From pub at goldshmidt.org  Sun Nov  2 10:08:59 2014
From: pub at goldshmidt.org (Oleg Goldshmidt)
Date: Sun, 2 Nov 2014 10:08:59 +0200
Subject: Fwd: preventing dhclient from running under certain conditions
In-Reply-To: <CAM+3FtTYReitrVwkr1UMwirniDFu80yGYXme8inxfz6Cc2pk9g@mail.gmail.com>
References: <CAM+3FtRCiNJmfr4rmt6DOZAkCxqs6zdMpWy29yLih-CF+aDY-A@mail.gmail.com>
 <CAKnt4U92PoNhpUxfiy5=tMorN7wCqFT6UqbWngYV1VGno=p=Pg@mail.gmail.com>
 <CAM+3FtTYReitrVwkr1UMwirniDFu80yGYXme8inxfz6Cc2pk9g@mail.gmail.com>
Message-ID: <CAM+3FtR9ho8TMxj2wPnsQrkopy6pytWYVgOubGBYci3LxCcQKA@mail.gmail.com>

?I noticed that I had responded only to shimi and not to the list?
?...?



On Thu, Oct 30, 2014 at 12:10 AM, shimi <linux-il at shimi.net> wrote:

> ?
> What about allow-hotplug?
>
> http://www.debian.org/doc/manuals/debian-reference/ch05.en.html#_the_basic_syntax_of_etc_network_interfaces
>
?
I tested allow-hotplug. Frankly, it does not seem to do anything useful.
E.g., ifup vlanXX sends out DHCP whether or not the Ethernel cable is
plugged in or not. Besides, it is only good for fiddling with cables[*],
and even in that limited scenario we do not necessarily want hotplug
action. Rather, we want to control when interfaces are brought up or down
*and* whether or not to request settings from DHCP.

[*] It is not clear to me that allow-hotplug actually does what it says on
the tin (as I understand it). I don't see anything happening when I fiddle
with cables. It is not clear to me what it does or what it is supposed to
do, and I would be quite uncomfortable switching to allow-hotplug without
really comprehensive retesting of *everything* (as opposed to testing
starting/stopping DHCP interfaces).

Thanks,

-- 
Oleg Goldshmidt | pub at goldshmidt.org
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From mordbe0 at gmail.com  Sun Nov  2 11:18:37 2014
From: mordbe0 at gmail.com (Mord Behar)
Date: Sun, 2 Nov 2014 11:18:37 +0200
Subject: OT: video capture
Message-ID: <CAJzkJxEP2rctS4wH0kpsGo1GZxhPjFnoL+J8HpAwTfiwFmZskA@mail.gmail.com>

We have a lot of VHS tapes that we want to digitize.
Anybody out there have a video capture card?
What kind?
Where did you buy it?
How much?
What sort of software do you use?
Are you satisfied with the results?
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From const at makelinux.co.il  Sun Nov  2 11:41:48 2014
From: const at makelinux.co.il (Constantine Shulyupin)
Date: Sun, 2 Nov 2014 11:41:48 +0200
Subject: OT: video capture
In-Reply-To: <CAJzkJxEP2rctS4wH0kpsGo1GZxhPjFnoL+J8HpAwTfiwFmZskA@mail.gmail.com>
References: <CAJzkJxEP2rctS4wH0kpsGo1GZxhPjFnoL+J8HpAwTfiwFmZskA@mail.gmail.com>
Message-ID: <CAE7jHC93rT=SL2OGswUPNDSB12iyuUHEP22QQY0SYAox4Yq80A@mail.gmail.com>

http://www.ebay.com/bhp/usb-video-capture-device

On Sun, Nov 2, 2014 at 11:18 AM, Mord Behar <mordbe0 at gmail.com> wrote:
> We have a lot of VHS tapes that we want to digitize.
> Anybody out there have a video capture card?
> What kind?
> Where did you buy it?
> How much?
> What sort of software do you use?
> Are you satisfied with the results?
>
> _______________________________________________
> Linux-il mailing list
> Linux-il at cs.huji.ac.il
> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>



-- 
Constantine Shulyupin
http://www.MakeLinux.co.il/
Embedded Linux Systems
Tel Aviv


From mordbe0 at gmail.com  Sun Nov  2 11:51:45 2014
From: mordbe0 at gmail.com (Mord Behar)
Date: Sun, 2 Nov 2014 11:51:45 +0200
Subject: OT: video capture
In-Reply-To: <CAE7jHC93rT=SL2OGswUPNDSB12iyuUHEP22QQY0SYAox4Yq80A@mail.gmail.com>
References: <CAJzkJxEP2rctS4wH0kpsGo1GZxhPjFnoL+J8HpAwTfiwFmZskA@mail.gmail.com>
 <CAE7jHC93rT=SL2OGswUPNDSB12iyuUHEP22QQY0SYAox4Yq80A@mail.gmail.com>
Message-ID: <CAJzkJxGcxf+WPOMVi_zjGpsnypUGwU_vSaT5MCBCrVq2C=VqOQ@mail.gmail.com>

On Sun, Nov 2, 2014 at 11:41 AM, Constantine Shulyupin <
const at makelinux.co.il> wrote:

> http://www.ebay.com/bhp/usb-video-capture-device
>
>
Thanks, but I was looking for a more personal experience. I found devices
as cheap as $5 on Chinese sites, some of them with free shipping. I'm
looking for success or failure stories. What the setup was, how easy or
hard it was to use, what the final results are like.


> On Sun, Nov 2, 2014 at 11:18 AM, Mord Behar <mordbe0 at gmail.com> wrote:
> > We have a lot of VHS tapes that we want to digitize.
> > Anybody out there have a video capture card?
> > What kind?
> > Where did you buy it?
> > How much?
> > What sort of software do you use?
> > Are you satisfied with the results?
> >
> > _______________________________________________
> > Linux-il mailing list
> > Linux-il at cs.huji.ac.il
> > http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
> >
>
>
>
> --
> Constantine Shulyupin
> http://www.MakeLinux.co.il/
> Embedded Linux Systems
> Tel Aviv
>
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From const at makelinux.co.il  Sun Nov  2 11:53:32 2014
From: const at makelinux.co.il (Constantine Shulyupin)
Date: Sun, 2 Nov 2014 11:53:32 +0200
Subject: OT: video capture
In-Reply-To: <CAJzkJxGcxf+WPOMVi_zjGpsnypUGwU_vSaT5MCBCrVq2C=VqOQ@mail.gmail.com>
References: <CAJzkJxEP2rctS4wH0kpsGo1GZxhPjFnoL+J8HpAwTfiwFmZskA@mail.gmail.com>
 <CAE7jHC93rT=SL2OGswUPNDSB12iyuUHEP22QQY0SYAox4Yq80A@mail.gmail.com>
 <CAJzkJxGcxf+WPOMVi_zjGpsnypUGwU_vSaT5MCBCrVq2C=VqOQ@mail.gmail.com>
Message-ID: <CAE7jHC9MtXpOGp+LZdyB0UPg=_VGZ5ccX-yO+R8bBC3YRrOdQA@mail.gmail.com>

I've used EasyCAP. I satisfied.

On Sun, Nov 2, 2014 at 11:51 AM, Mord Behar <mordbe0 at gmail.com> wrote:
>
>
> On Sun, Nov 2, 2014 at 11:41 AM, Constantine Shulyupin
> <const at makelinux.co.il> wrote:
>>
>> http://www.ebay.com/bhp/usb-video-capture-device
>>
>
> Thanks, but I was looking for a more personal experience. I found devices as
> cheap as $5 on Chinese sites, some of them with free shipping. I'm looking
> for success or failure stories. What the setup was, how easy or hard it was
> to use, what the final results are like.
>
>>
>> On Sun, Nov 2, 2014 at 11:18 AM, Mord Behar <mordbe0 at gmail.com> wrote:
>> > We have a lot of VHS tapes that we want to digitize.
>> > Anybody out there have a video capture card?
>> > What kind?
>> > Where did you buy it?
>> > How much?
>> > What sort of software do you use?
>> > Are you satisfied with the results?
>> >
>> > _______________________________________________
>> > Linux-il mailing list
>> > Linux-il at cs.huji.ac.il
>> > http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>> >
>>
>>
>>
>> --
>> Constantine Shulyupin
>> http://www.MakeLinux.co.il/
>> Embedded Linux Systems
>> Tel Aviv
>
>



-- 
Constantine Shulyupin
http://www.MakeLinux.co.il/
Embedded Linux Systems
Tel Aviv


From rabin at rabin.io  Sun Nov  2 13:50:27 2014
From: rabin at rabin.io (Rabin Yasharzadehe)
Date: Sun, 2 Nov 2014 13:50:27 +0200
Subject: OT: video capture
In-Reply-To: <CAJzkJxGcxf+WPOMVi_zjGpsnypUGwU_vSaT5MCBCrVq2C=VqOQ@mail.gmail.com>
References: <CAJzkJxEP2rctS4wH0kpsGo1GZxhPjFnoL+J8HpAwTfiwFmZskA@mail.gmail.com>
 <CAE7jHC93rT=SL2OGswUPNDSB12iyuUHEP22QQY0SYAox4Yq80A@mail.gmail.com>
 <CAJzkJxGcxf+WPOMVi_zjGpsnypUGwU_vSaT5MCBCrVq2C=VqOQ@mail.gmail.com>
Message-ID: <CABKuJEASo27v1As2uj15+82LsriVOCO3bs5-i_vQfbTGoHyiTg@mail.gmail.com>

My experience with them is mixed,

the first device i bought (easyCAP from DX) didn't work well, and i got
many segfault with it, don't remember the chip-set that was use in that
device back then (2.5/3 years ago), had to compile the module from source
(not a very active community around this device driver/module) many bad
experience.

Then i borrowed a slimier device from my collage and test it on windows
(finding drivers for Win7 64bit was a bitch back then), anyway, at the end
it worked i preferred to record the caste to a uncompressed AVI file (~20G
per 3 hours) and not use the direct MPEG2 encoder.

Then I use VirtualDub to apply some filters to optimize the picture quality
(CROP few lines the bottom, some soft bluing i think and one more for the
"lines" which i can't recall right now), and used DivX for compressing the
video and mp3 for the audio (and I used a single pass compression).

then i used the device on my Linux machine (F17 i think back then), and it
worked, seems like my first device had a hardware problem.

Bottom line (for me) was, not all silicon chips created the same, and be
careful when buying cheap converters.



--
Rabin

On Sun, Nov 2, 2014 at 11:51 AM, Mord Behar <mordbe0 at gmail.com> wrote:

>
>
> On Sun, Nov 2, 2014 at 11:41 AM, Constantine Shulyupin <
> const at makelinux.co.il> wrote:
>
>> http://www.ebay.com/bhp/usb-video-capture-device
>>
>>
> Thanks, but I was looking for a more personal experience. I found devices
> as cheap as $5 on Chinese sites, some of them with free shipping. I'm
> looking for success or failure stories. What the setup was, how easy or
> hard it was to use, what the final results are like.
>
>
>> On Sun, Nov 2, 2014 at 11:18 AM, Mord Behar <mordbe0 at gmail.com> wrote:
>> > We have a lot of VHS tapes that we want to digitize.
>> > Anybody out there have a video capture card?
>> > What kind?
>> > Where did you buy it?
>> > How much?
>> > What sort of software do you use?
>> > Are you satisfied with the results?
>> >
>> > _______________________________________________
>> > Linux-il mailing list
>> > Linux-il at cs.huji.ac.il
>> > http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>> >
>>
>>
>>
>> --
>> Constantine Shulyupin
>> http://www.MakeLinux.co.il/
>> Embedded Linux Systems
>> Tel Aviv
>>
>
>
> _______________________________________________
> Linux-il mailing list
> Linux-il at cs.huji.ac.il
> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>
>
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From dronkin at gmail.com  Sun Nov  2 17:09:11 2014
From: dronkin at gmail.com (David Ronkin)
Date: Sun, 2 Nov 2014 17:09:11 +0200
Subject: phonegap developer freelance needed
Message-ID: <CAGq1vfE5vo+yKtdHXN9X00iOPq=KgRFJxq2sb_Tob32RF1+Uag@mail.gmail.com>

Hi all,
Sorry not 100% linux, but related.. (backend is linux )

I have a vacancy  in my team at Ok2go.co.il for a mid-term project for
experienced freelance app developer (Phonegap framework only).


Please contact off the list.

Thanks!
David




-- 
?????,
??? ??????

*?? ???? ????? ??*?: http://dronkin.blogspot.com
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From vordoo at yahoo.com  Sun Nov  2 17:26:47 2014
From: vordoo at yahoo.com (vordoo)
Date: Sun, 02 Nov 2014 17:26:47 +0200
Subject: OT: video capture
In-Reply-To: <CAJzkJxEP2rctS4wH0kpsGo1GZxhPjFnoL+J8HpAwTfiwFmZskA@mail.gmail.com>
References: <CAJzkJxEP2rctS4wH0kpsGo1GZxhPjFnoL+J8HpAwTfiwFmZskA@mail.gmail.com>
Message-ID: <54564D37.4050701@yahoo.com>

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From vordoo at yahoo.com  Sun Nov  2 17:29:51 2014
From: vordoo at yahoo.com (vordoo)
Date: Sun, 02 Nov 2014 17:29:51 +0200
Subject: OT: video capture
In-Reply-To: <CAJzkJxEP2rctS4wH0kpsGo1GZxhPjFnoL+J8HpAwTfiwFmZskA@mail.gmail.com>
References: <CAJzkJxEP2rctS4wH0kpsGo1GZxhPjFnoL+J8HpAwTfiwFmZskA@mail.gmail.com>
Message-ID: <54564DEF.6050609@yahoo.com>

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From sara.fink at gmail.com  Mon Nov  3 00:15:07 2014
From: sara.fink at gmail.com (sara fink)
Date: Mon, 3 Nov 2014 00:15:07 +0200
Subject: OT: video capture
In-Reply-To: <CAJzkJxEP2rctS4wH0kpsGo1GZxhPjFnoL+J8HpAwTfiwFmZskA@mail.gmail.com>
References: <CAJzkJxEP2rctS4wH0kpsGo1GZxhPjFnoL+J8HpAwTfiwFmZskA@mail.gmail.com>
Message-ID: <CAKsgyTaWmkv+sLibkR8mAwCAzbSuUCEQUvqEvoUXQyyc7uXTxg@mail.gmail.com>

Hauppauge is a serious company. They have professional equipment.

There is support in linux as well.

http://hauppage.com/site/products/prods.html

On Sun, Nov 2, 2014 at 11:18 AM, Mord Behar <mordbe0 at gmail.com> wrote:

> We have a lot of VHS tapes that we want to digitize.
> Anybody out there have a video capture card?
> What kind?
> Where did you buy it?
> How much?
> What sort of software do you use?
> Are you satisfied with the results?
>
> _______________________________________________
> Linux-il mailing list
> Linux-il at cs.huji.ac.il
> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>
>
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From erez0001 at gmail.com  Sun Nov  9 10:29:36 2014
From: erez0001 at gmail.com (Erez D)
Date: Sun, 9 Nov 2014 11:29:36 +0300
Subject: good free dynamic dns server ?
Message-ID: <CAMUp3wnkTk8PWdGb1V6KkxrjoATw6K_PTcq27fhVWj2Qt==X8w@mail.gmail.com>

hi

i am currently using no-ip.org as a free dynamic dns server for my home.
however it has the annoying feature of sending me the following emails:
"Please confirm your hostname now or it will be deleted"

anyone knows of a good free dyndns server ?
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From amos.shapira at gmail.com  Sun Nov  9 14:14:55 2014
From: amos.shapira at gmail.com (Amos Shapira)
Date: Sun, 9 Nov 2014 14:14:55 +0200
Subject: good free dynamic dns server ?
In-Reply-To: <CAMUp3wnkTk8PWdGb1V6KkxrjoATw6K_PTcq27fhVWj2Qt==X8w@mail.gmail.com>
References: <CAMUp3wnkTk8PWdGb1V6KkxrjoATw6K_PTcq27fhVWj2Qt==X8w@mail.gmail.com>
Message-ID: <CAF9n_WVOnnLz0NKvSe9UX86-o3R4YgVXXFLfroNobJEqH_aE0g@mail.gmail.com>

I did this for years until I "broke down" and paid the $16 for a year of
avoiding these.
On 9 Nov 2014 10:31, "Erez D" <erez0001 at gmail.com> wrote:

> hi
>
> i am currently using no-ip.org as a free dynamic dns server for my home.
> however it has the annoying feature of sending me the following emails:
> "Please confirm your hostname now or it will be deleted"
>
> anyone knows of a good free dyndns server ?
>
> _______________________________________________
> Linux-il mailing list
> Linux-il at cs.huji.ac.il
> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>
>
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From rabin at rabin.io  Sun Nov  9 14:54:52 2014
From: rabin at rabin.io (Rabin Yasharzadehe)
Date: Sun, 9 Nov 2014 14:54:52 +0200
Subject: good free dynamic dns server ?
In-Reply-To: <CAMUp3wnkTk8PWdGb1V6KkxrjoATw6K_PTcq27fhVWj2Qt==X8w@mail.gmail.com>
References: <CAMUp3wnkTk8PWdGb1V6KkxrjoATw6K_PTcq27fhVWj2Qt==X8w@mail.gmail.com>
Message-ID: <CABKuJECvnnneNiN2Gh==G0ThwJrW2siYJ2c7JgrkVFiHNp2sTA@mail.gmail.com>

If you have your own domain, you can manage it using CloudFlare and use
there API <https://www.cloudflare.com/docs/client-api.html> to edit the zone
<https://www.cloudflare.com/docs/client-api.html#s5.2> file and update the
IP address each time it change.

--
Rabin

On Sun, Nov 9, 2014 at 10:29 AM, Erez D <erez0001 at gmail.com> wrote:

> hi
>
> i am currently using no-ip.org as a free dynamic dns server for my home.
> however it has the annoying feature of sending me the following emails:
> "Please confirm your hostname now or it will be deleted"
>
> anyone knows of a good free dyndns server ?
>
> _______________________________________________
> Linux-il mailing list
> Linux-il at cs.huji.ac.il
> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>
>
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From vordoo at yahoo.com  Sun Nov  9 15:00:29 2014
From: vordoo at yahoo.com (vordoo)
Date: Sun, 09 Nov 2014 15:00:29 +0200
Subject: good free dynamic dns server ?
In-Reply-To: <CAMUp3wnkTk8PWdGb1V6KkxrjoATw6K_PTcq27fhVWj2Qt==X8w@mail.gmail.com>
References: <CAMUp3wnkTk8PWdGb1V6KkxrjoATw6K_PTcq27fhVWj2Qt==X8w@mail.gmail.com>
Message-ID: <545F656D.7010007@yahoo.com>

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From erez0001 at gmail.com  Sun Nov  9 19:56:44 2014
From: erez0001 at gmail.com (Erez D)
Date: Sun, 9 Nov 2014 19:56:44 +0200
Subject: Xml grabber for hot
Message-ID: <CAMUp3w=7Q9V=rFS2oKpYbeXbVAqYy4q2UMz-kYcsOdUi+M5S9w@mail.gmail.com>

I had an xml grabber for hot (someone wrote it for .net few years ago and i
ran it with mono but it stopped working)
Anyone knows of a working one ?
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From slitt at troubleshooters.com  Sun Nov  9 19:48:33 2014
From: slitt at troubleshooters.com (Steve Litt)
Date: Sun, 9 Nov 2014 12:48:33 -0500
Subject: good free dynamic dns server ?
In-Reply-To: <CAMUp3wnkTk8PWdGb1V6KkxrjoATw6K_PTcq27fhVWj2Qt==X8w@mail.gmail.com>
References: <CAMUp3wnkTk8PWdGb1V6KkxrjoATw6K_PTcq27fhVWj2Qt==X8w@mail.gmail.com>
Message-ID: <20141109124833.7c858765@mydesq2.domain.cxm>

On Sun, 9 Nov 2014 11:29:36 +0300
Erez D <erez0001 at gmail.com> wrote:

> hi
> 
> i am currently using no-ip.org as a free dynamic dns server for my
> home. however it has the annoying feature of sending me the following
> emails: "Please confirm your hostname now or it will be deleted"
> 
> anyone knows of a good free dyndns server ?

Afraid.org has been maintaining my dynamic dns for years. One thing I
like about it is it's "client" is an easy to understand shellscript.

SteveT

Steve Litt                *  http://www.troubleshooters.com/
Troubleshooting Training  *  Human Performance



From mordbe0 at gmail.com  Mon Nov 10 11:51:32 2014
From: mordbe0 at gmail.com (Mord Behar)
Date: Mon, 10 Nov 2014 11:51:32 +0200
Subject: OT: Moto X 2014
Message-ID: <CAJzkJxEy3rwgCMCDnK6B7bx76tV7uVQfRgBF7yJD_Fb9Dq=xxA@mail.gmail.com>

I originally sent this to the Android ML, but it doesn't have the same
readership as this list, and I got no answers.
Apparently there is a way to buy an unlocked Moto X from Motorola, provided
you have a US billing and shipping address.
Looking at the specs it appears as if it would work here with Cellcom's and
Orange's infrastructure (and maybe Pelephone?).
Has anybody bought one and used it here?
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From esr+linux-il at g.jct.ac.il  Mon Nov 10 12:06:41 2014
From: esr+linux-il at g.jct.ac.il (E.S. Rosenberg)
Date: Mon, 10 Nov 2014 12:06:41 +0200
Subject: OT: Jolla phone
Message-ID: <CAHTx_BOxL4EaHRT6xX4_-v5mTtp-29xdmOTrWoDYm7GQM3neag@mail.gmail.com>

Mords' mail reminded me that I should have sent this earlier:
If there is anyone on the list interested in getting the Jolla phone
('grandson' of the nokia n900/'son' of the n9) I have a 100E discount code
that is valid until midnight today (I assume midnight Finland time, but
it's not specified).

You do need an address in the EU to ship to, the phone is 249E after
discount and shipping is another 15 I think...

Hope someont finds this useful.
Eliyahu - ?????
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From vordoo at yahoo.com  Mon Nov 10 12:19:40 2014
From: vordoo at yahoo.com (vordoo)
Date: Mon, 10 Nov 2014 12:19:40 +0200
Subject: good free dynamic dns server ?
In-Reply-To: <20141109124833.7c858765@mydesq2.domain.cxm>
References: <CAMUp3wnkTk8PWdGb1V6KkxrjoATw6K_PTcq27fhVWj2Qt==X8w@mail.gmail.com>
 <20141109124833.7c858765@mydesq2.domain.cxm>
Message-ID: <5460913C.7050509@yahoo.com>

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From slitt at troubleshooters.com  Mon Nov 10 19:34:52 2014
From: slitt at troubleshooters.com (Steve Litt)
Date: Mon, 10 Nov 2014 12:34:52 -0500
Subject: good free dynamic dns server ?
In-Reply-To: <5460913C.7050509@yahoo.com>
References: <CAMUp3wnkTk8PWdGb1V6KkxrjoATw6K_PTcq27fhVWj2Qt==X8w@mail.gmail.com>
 <20141109124833.7c858765@mydesq2.domain.cxm>
 <5460913C.7050509@yahoo.com>
Message-ID: <20141110123452.469f0317@mydesq2.domain.cxm>

It's similar.

On Mon, 10 Nov 2014 12:19:40 +0200
vordoo <vordoo at yahoo.com> wrote:

> Can it beat this:
> echo url="https://www.duckdns.org/update?domains=XYZ&token=NJK&ip=" |
> curl -k -o ~/duckdns/duck.log -K -
> 
> ;-)
> 
> On 11/09/2014 07:48 PM, Steve Litt wrote:
> On Sun, 9 Nov 2014 11:29:36 +0300
> Erez D <erez0001 at gmail.com> wrote:
> 
> hi
> 
> i am currently using no-ip.org as a free dynamic dns server for my
> home. however it has the annoying feature of sending me the following
> emails: "Please confirm your hostname now or it will be deleted"
> 
> anyone knows of a good free dyndns server ?
> 
> Afraid.org has been maintaining my dynamic dns for years. One thing I
> like about it is it's "client" is an easy to understand shellscript.
> 
> SteveT
> 
> Steve Litt                *  http://www.troubleshooters.com/
> Troubleshooting Training  *  Human Performance


From const at makelinux.co.il  Tue Nov 11 19:17:27 2014
From: const at makelinux.co.il (Constantine Shulyupin)
Date: Tue, 11 Nov 2014 19:17:27 +0200
Subject: OCF CESA
Message-ID: <CAE7jHC8U64Jk5WW4i56bvwJtAAYY1khNaf-O0ZQUa4Dmc613OA@mail.gmail.com>

Hi friends,

Has anybody experience with  openssl, ocf-linux and CESA on ARM Armaga 370?

Thanks
-- 
Constantine Shulyupin
http://www.MakeLinux.co.il/
Embedded Linux Systems
Tel Aviv


From amichai at iglu.org.il  Thu Nov 13 14:33:35 2014
From: amichai at iglu.org.il (Amichai Rotman)
Date: Thu, 13 Nov 2014 14:33:35 +0200
Subject: LibraOffice and Language Switching
Message-ID: <CAD_ZK65DQjNDbYjCmfDJ9DH1hWrSn-FvcX1oBKP+V+NcS3iv9A@mail.gmail.com>

Hi all,

Since upgrading to LibraOffice 4.2 on my Ubuntu 14.04, I can?t use the
CTRL-C and such if I am writing a document in Hebrew.

On previous versions I could copy text using the keyboard regardless of the
language I was using at the time.

Any ideas how to get that back?

Thanks!

Amichai.
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From mordbe0 at gmail.com  Thu Nov 13 16:49:13 2014
From: mordbe0 at gmail.com (Mord Behar)
Date: Thu, 13 Nov 2014 16:49:13 +0200
Subject: LibraOffice and Language Switching
In-Reply-To: <CAD_ZK65DQjNDbYjCmfDJ9DH1hWrSn-FvcX1oBKP+V+NcS3iv9A@mail.gmail.com>
References: <CAD_ZK65DQjNDbYjCmfDJ9DH1hWrSn-FvcX1oBKP+V+NcS3iv9A@mail.gmail.com>
Message-ID: <CAJzkJxGdrAuoL9SuXNHASg7XTgY4BMnXo4s0JsDb1k4kcd5Apw@mail.gmail.com>

I recall some kind of issue like this in past Libre Office versions. There
was a setting that allowed command shortcuts to be language-independent. I
can't remember where it was. Obviously you looked in the LO settings. Try
the global DE settings...

On Thu, Nov 13, 2014 at 2:33 PM, Amichai Rotman <amichai at iglu.org.il> wrote:

> Hi all,
>
> Since upgrading to LibraOffice 4.2 on my Ubuntu 14.04, I can?t use the
> CTRL-C and such if I am writing a document in Hebrew.
>
> On previous versions I could copy text using the keyboard regardless of
> the language I was using at the time.
>
> Any ideas how to get that back?
>
> Thanks!
>
> Amichai.
>
> _______________________________________________
> Linux-il mailing list
> Linux-il at cs.huji.ac.il
> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>
>
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From esr+linux-il at g.jct.ac.il  Thu Nov 13 19:02:01 2014
From: esr+linux-il at g.jct.ac.il (E.S. Rosenberg)
Date: Thu, 13 Nov 2014 19:02:01 +0200
Subject: LibraOffice and Language Switching
In-Reply-To: <CAJzkJxGdrAuoL9SuXNHASg7XTgY4BMnXo4s0JsDb1k4kcd5Apw@mail.gmail.com>
References: <CAD_ZK65DQjNDbYjCmfDJ9DH1hWrSn-FvcX1oBKP+V+NcS3iv9A@mail.gmail.com>
 <CAJzkJxGdrAuoL9SuXNHASg7XTgY4BMnXo4s0JsDb1k4kcd5Apw@mail.gmail.com>
Message-ID: <CAHTx_BPNTCSmfXVf0bjTROUHL6taGR-0xpy_vTAfTcbFav5muw@mail.gmail.com>

IIRC this behavior doesn't happen on a machine I use xfce on instead of
gnome3/unity so it may very well be DE dependent....

Regards,
Eliyahu - ?????

2014-11-13 16:49 GMT+02:00 Mord Behar <mordbe0 at gmail.com>:

> I recall some kind of issue like this in past Libre Office versions. There
> was a setting that allowed command shortcuts to be language-independent. I
> can't remember where it was. Obviously you looked in the LO settings. Try
> the global DE settings...
>
> On Thu, Nov 13, 2014 at 2:33 PM, Amichai Rotman <amichai at iglu.org.il>
> wrote:
>
>> Hi all,
>>
>> Since upgrading to LibraOffice 4.2 on my Ubuntu 14.04, I can?t use the
>> CTRL-C and such if I am writing a document in Hebrew.
>>
>> On previous versions I could copy text using the keyboard regardless of
>> the language I was using at the time.
>>
>> Any ideas how to get that back?
>>
>> Thanks!
>>
>> Amichai.
>>
>> _______________________________________________
>> Linux-il mailing list
>> Linux-il at cs.huji.ac.il
>> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>>
>>
>
> _______________________________________________
> Linux-il mailing list
> Linux-il at cs.huji.ac.il
> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>
>
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From eli at billauer.co.il  Sat Nov 15 18:56:12 2014
From: eli at billauer.co.il (Eli Billauer)
Date: Sat, 15 Nov 2014 18:56:12 +0200
Subject: [HAIFUX LECTURE] CiviCRM Meetup -- Xavier Dutoit
Message-ID: <546785AC.5090609@billauer.co.il>

On Monday, November 17th at 18:30, Haifux will gather to hear a talk by Xavier Dutoit:

    CiviCRM Meetup

Abstract


CiviCRM is a free and open source software constituent relationship 
management solution. CiviCRM is web-based, internationalized, and 
designed specifically to meet the needs of advocacy and non-profit 
groups to manage their contacts, membership, donations & newsletter.

At this meeting you can learn more about what CiviCRM can do for your 
organisation, with examples of other NGOs, trade unions and 
associations. Meet others who are also interested in CiviCRM or who are 
already using it in their organisation. Talk to developers who know all 
about CiviCRM.

Note that the meeting will be held in *English*

    * Introduction to CiviCRM. What does it offer NGOs?
          o What's planned for the next version & info about CiviCon in
            San Francisco
    * Some examples of NGOs using CiviCRM
    * Possible uses of CiviCRM as seen in other NGOs:
          o Organising events
          o Doing emailings to the press/members...
          o Tracking advocacy actions, petitions & surveys
          o Membership & donations

=================================================================

We meet in Taub building, room 6. For instructions see:
http://www.haifux.org/where.html

Attendance is free, and you are all invited!

==================================================================
Future lectures:

01/12/14 Topics in advanced Python: Hai Zaar


==================================================================

We are always interested in hearing your talks and ideas. If you wish to give a talk, hold a discussion, or just plan some event haifux might be interested in, please contact us at webmaster at haifux.org

-- 
Web: http://www.billauer.co.il



From oron at actcom.co.il  Sun Nov 16 11:14:59 2014
From: oron at actcom.co.il (Oron Peled)
Date: Sun, 16 Nov 2014 11:14:59 +0200
Subject: [JOB-OFFER] Linux devops people for embedded
Message-ID: <6161209.BNHLTv93pv@neon.home.il>

Hi,

Below is a verbatim copy forwarded directly from the related company
please answer directly to them.

----------  Forwarded Message  ----------

Do you breath, eat and drink LINUX?
If the answer is yes, HARMONIC IS LOOKING FOR YOU!
HARMONIC, the worldwide leader in video delivery infrastructure solutions
is offering a challenging position in DEVOPS development in our site in Caesarea.

So if you got passion to LINUX and want to specialize in a great atmosphere
and you answer the below requirements, please send us your CV to:
     Jobs at harmonicinc.com<mailto:Jobs at harmonicinc.com>

* B.Sc in Computer science from a known university
* 0-3 years of experience in SW development
* 2-3 years of extensive experience in a LINUX environment and with C / C++ Programming
* Experience in DEVOPS development, Configuration Management (e.g. SVN), Scripting languages (e.g. Bash, Python) ? advantage

For more information about Harmonic: http://www.harmonicinc.com/content/your-career-here

-- 
Oron Peled                                 Voice: +972-4-8228492
oron at actcom.co.il                  http://users.actcom.co.il/~oron

Linux lasts longer!
                        -- "Kim J. Brand" <kim at kimbrand.com>

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From shlomif at gmail.com  Mon Nov 17 18:42:55 2014
From: shlomif at gmail.com (Shlomi Fish)
Date: Mon, 17 Nov 2014 18:42:55 +0200
Subject: Fwd: Fw: [Qt-israel] Qt talk at the next FOSS Monthly meetup
In-Reply-To: <20141117184016.7b575c3b@telaviv1.shlomifish.org>
References: <20141117184016.7b575c3b@telaviv1.shlomifish.org>
Message-ID: <CANy4znV35sQFSb-7A1a79sFUeV_=amYppyz21WQV9dKib98wGQ@mail.gmail.com>

Hi all,

we are going to have a monthly meetup about open source technologies on
Wednesday, November 26, 2014

in 18:30 at
 Google Campus Tel Aviv, Electra Tower
<http://maps.google.com/maps?f=q&hl=en&q=Yigal+Alon+98%2C+Tel+Aviv-Yafo%2C+il>

Yigal Alon 98, Tel Aviv-Yafo (edit map
<http://www.meetup.com/Open-Source-and-Free-Software-in-Israel/events/218634223/>
)
More details below and at the link. Hope to see you there.

Regards,

-- Shlomi Fish

---------- Forwarded message ----------
From: Shlomi Fish <shlomif at shlomifish.org>
Date: Mon, Nov 17, 2014 at 6:40 PM
Subject: Fw: [Qt-israel] Qt talk at the next FOSS Monthly meetup
To: Shlomi Fish <shlomif at gmail.com>




Begin forwarded message:

Date: Mon, 17 Nov 2014 07:12:12 +0200
From: ynon perek <ynonperek at gmail.com>
To: Local Qt community <qt-israel at hamakor.org.il>
Subject: [Qt-israel] Qt talk at the next FOSS Monthly meetup


Hi All,

In the next FOSS monthly meet up I'll talk about how to write multi
threaded code in Qt, and share some tips to make your life easier while
doing so.

Ido will give the second talk about development Anti-Patterns.

For details and registration please visit the event page:
http://www.meetup.com/Open-Source-and-Free-Software-in-Israel/events/218634223/

Regards,
  Ynon


--
-----------------------------------------------------------------
Shlomi Fish       http://www.shlomifish.org/
Humanity - Parody of Modern Life - http://shlom.in/humanity

I figured wrong (with a capital R).
    ? Harvey Danger: ?Wine, Women and Song?.

Please reply to list if it's a mailing list post - http://shlom.in/reply .

_______________________________________________
Qt-israel mailing list
Qt-israel at hamakor.org.il
http://hamakor.org.il/cgi-bin/mailman/listinfo/qt-israel




-- 
------------------------------------------
Shlomi Fish http://www.shlomifish.org/

Chuck Norris helps the gods that help themselves.

Please reply to list if it's a mailing list post - http://shlom.in/reply .
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From gabor at szabgab.com  Wed Nov 19 11:38:20 2014
From: gabor at szabgab.com (Gabor Szabo)
Date: Wed, 19 Nov 2014 11:38:20 +0200
Subject: BYOD in schools
Message-ID: <CABe4FJC2dC+DaH2S5-tXjht9kkm8cB1F-aYeExmGTGCWi6VUHg@mail.gmail.com>

In our school the management is trying to implement BYOD = Bring Your Own
Device

Some details here:

http://schooly.co.il/rabin-modiin/page.asp?page_parent=105646

First they talked about tablets but now it seems they talk about making us
buy
notebooks.
Among many other issues, please note the technical requirements that gives
us a choice of operating system:
Windows 7 or Windows 8

OTOH I could not find any information regarding the applications they want
to run.

Do you have any information about similar projects in other schools in
Israel?
What kind of devices have they used? What kind of applications do they
install?

Gabor
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From mordbe0 at gmail.com  Wed Nov 19 13:53:45 2014
From: mordbe0 at gmail.com (Mord Behar)
Date: Wed, 19 Nov 2014 13:53:45 +0200
Subject: BYOD in schools
In-Reply-To: <CABe4FJC2dC+DaH2S5-tXjht9kkm8cB1F-aYeExmGTGCWi6VUHg@mail.gmail.com>
References: <CABe4FJC2dC+DaH2S5-tXjht9kkm8cB1F-aYeExmGTGCWi6VUHg@mail.gmail.com>
Message-ID: <CAJzkJxEge67AhFcXNwiztNKfkWv=rHEhE7sWF++fam7n5UKusw@mail.gmail.com>

I don't know about students, but my mother is a teacher and she has to use
some legacy software that was written for Windows XP and fails on Win 7
about 70% of the time. It's proprietary software written by the ministry
for education and could not be easily ported to Linux.

On Wed, Nov 19, 2014 at 11:38 AM, Gabor Szabo <gabor at szabgab.com> wrote:

> In our school the management is trying to implement BYOD = Bring Your Own
> Device
>
> Some details here:
>
> http://schooly.co.il/rabin-modiin/page.asp?page_parent=105646
>
> First they talked about tablets but now it seems they talk about making us
> buy
> notebooks.
> Among many other issues, please note the technical requirements that gives
> us a choice of operating system:
> Windows 7 or Windows 8
>
> OTOH I could not find any information regarding the applications they want
> to run.
>
> Do you have any information about similar projects in other schools in
> Israel?
> What kind of devices have they used? What kind of applications do they
> install?
>
> Gabor
>
>
> _______________________________________________
> Linux-il mailing list
> Linux-il at cs.huji.ac.il
> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>
>
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From mordbe0 at gmail.com  Wed Nov 19 20:22:13 2014
From: mordbe0 at gmail.com (Mord Behar)
Date: Wed, 19 Nov 2014 20:22:13 +0200
Subject: Fw: [Qt-israel] Qt talk at the next FOSS Monthly meetup
In-Reply-To: <CANy4znV35sQFSb-7A1a79sFUeV_=amYppyz21WQV9dKib98wGQ@mail.gmail.com>
References: <20141117184016.7b575c3b@telaviv1.shlomifish.org>
 <CANy4znV35sQFSb-7A1a79sFUeV_=amYppyz21WQV9dKib98wGQ@mail.gmail.com>
Message-ID: <CAJzkJxFEndWV5WK=tqH6bPUFM9xZEhCu7X0qZe7qBaPTbK+o=g@mail.gmail.com>

Is anybody planning on driving from Yerushalayim?

On Mon, Nov 17, 2014 at 6:42 PM, Shlomi Fish <shlomif at gmail.com> wrote:

> Hi all,
>
> we are going to have a monthly meetup about open source technologies on
> Wednesday, November 26, 2014
>
> in 18:30 at
>  Google Campus Tel Aviv, Electra Tower
> <http://maps.google.com/maps?f=q&hl=en&q=Yigal+Alon+98%2C+Tel+Aviv-Yafo%2C+il>
>
> Yigal Alon 98, Tel Aviv-Yafo (edit map
> <http://www.meetup.com/Open-Source-and-Free-Software-in-Israel/events/218634223/>
> )
> More details below and at the link. Hope to see you there.
>
> Regards,
>
> -- Shlomi Fish
>
> ---------- Forwarded message ----------
> From: Shlomi Fish <shlomif at shlomifish.org>
> Date: Mon, Nov 17, 2014 at 6:40 PM
> Subject: Fw: [Qt-israel] Qt talk at the next FOSS Monthly meetup
> To: Shlomi Fish <shlomif at gmail.com>
>
>
>
>
> Begin forwarded message:
>
> Date: Mon, 17 Nov 2014 07:12:12 +0200
> From: ynon perek <ynonperek at gmail.com>
> To: Local Qt community <qt-israel at hamakor.org.il>
> Subject: [Qt-israel] Qt talk at the next FOSS Monthly meetup
>
>
> Hi All,
>
> In the next FOSS monthly meet up I'll talk about how to write multi
> threaded code in Qt, and share some tips to make your life easier while
> doing so.
>
> Ido will give the second talk about development Anti-Patterns.
>
> For details and registration please visit the event page:
>
> http://www.meetup.com/Open-Source-and-Free-Software-in-Israel/events/218634223/
>
> Regards,
>   Ynon
>
>
> --
> -----------------------------------------------------------------
> Shlomi Fish       http://www.shlomifish.org/
> Humanity - Parody of Modern Life - http://shlom.in/humanity
>
> I figured wrong (with a capital R).
>     ? Harvey Danger: ?Wine, Women and Song?.
>
> Please reply to list if it's a mailing list post - http://shlom.in/reply .
>
> _______________________________________________
> Qt-israel mailing list
> Qt-israel at hamakor.org.il
> http://hamakor.org.il/cgi-bin/mailman/listinfo/qt-israel
>
>
>
>
> --
> ------------------------------------------
> Shlomi Fish http://www.shlomifish.org/
>
> Chuck Norris helps the gods that help themselves.
>
> Please reply to list if it's a mailing list post - http://shlom.in/reply .
>
> _______________________________________________
> Linux-il mailing list
> Linux-il at cs.huji.ac.il
> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>
>
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From amichai at iglu.org.il  Sun Nov 23 22:45:59 2014
From: amichai at iglu.org.il (Amichai Rotman)
Date: Sun, 23 Nov 2014 22:45:59 +0200
Subject: Backdoor?
Message-ID: <CAD_ZK65OUd4Kun4nVW54jS4OnPHnRvT6dKkJaDsqfpdQLNPuDg@mail.gmail.com>

Hi All,

I am trying to troubleshoot a bottleneck in my internet connection.

I came across a few lines like these ones when I run 'netstat -ptW':

tcp        0      0 10.0.0.3:42239
82-166-201-152.barak-online.net:http
ESTABLISHED 5881/chrome
tcp        0      0 10.0.0.3:55224
 bzq-179-180-121.static.bezeqint.net:https ESTABLISHED 5881/chrome

I was once connected to these ISPs, but not for some time....

I have Netgear DGN2200 v2 provided by Bezeq, running firmware
 V1.0.8.31_1.8.31.

Does Bezeq and the ISPs open a backdoor in my router somehow?

How can I find out exactly where I am connected and why?

Thanks!

Amichai
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From amos.shapira at gmail.com  Sun Nov 23 23:02:11 2014
From: amos.shapira at gmail.com (Amos Shapira)
Date: Mon, 24 Nov 2014 08:02:11 +1100
Subject: Backdoor?
In-Reply-To: <CAD_ZK65OUd4Kun4nVW54jS4OnPHnRvT6dKkJaDsqfpdQLNPuDg@mail.gmail.com>
References: <CAD_ZK65OUd4Kun4nVW54jS4OnPHnRvT6dKkJaDsqfpdQLNPuDg@mail.gmail.com>
Message-ID: <CAF9n_WVhrp6kFrS4Je6YxypOydXVgr4CTJO08Wh=KRnS=gzh-w@mail.gmail.com>

There are various chrome tools, e.g. the Task Manager.

On 24 November 2014 at 07:45, Amichai Rotman <amichai at iglu.org.il> wrote:

> Hi All,
>
> I am trying to troubleshoot a bottleneck in my internet connection.
>
> I came across a few lines like these ones when I run 'netstat -ptW':
>
> tcp        0      0 10.0.0.3:42239
>  82-166-201-152.barak-online.net:http ESTABLISHED 5881/chrome
> tcp        0      0 10.0.0.3:55224
>  bzq-179-180-121.static.bezeqint.net:https ESTABLISHED 5881/chrome
>
> I was once connected to these ISPs, but not for some time....
>
> I have Netgear DGN2200 v2 provided by Bezeq, running firmware
>  V1.0.8.31_1.8.31.
>
> Does Bezeq and the ISPs open a backdoor in my router somehow?
>
> How can I find out exactly where I am connected and why?
>
> Thanks!
>
> Amichai
>
>
> _______________________________________________
> Linux-il mailing list
> Linux-il at cs.huji.ac.il
> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>
>


-- 
<http://au.linkedin.com/in/gliderflyer>
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From esr+linux-il at g.jct.ac.il  Mon Nov 24 00:26:21 2014
From: esr+linux-il at g.jct.ac.il (E.S. Rosenberg)
Date: Mon, 24 Nov 2014 00:26:21 +0200
Subject: Backdoor?
In-Reply-To: <CAF9n_WVhrp6kFrS4Je6YxypOydXVgr4CTJO08Wh=KRnS=gzh-w@mail.gmail.com>
References: <CAD_ZK65OUd4Kun4nVW54jS4OnPHnRvT6dKkJaDsqfpdQLNPuDg@mail.gmail.com>
 <CAF9n_WVhrp6kFrS4Je6YxypOydXVgr4CTJO08Wh=KRnS=gzh-w@mail.gmail.com>
Message-ID: <CAHTx_BP9_BjfH-br5y9TYzvbY=PcZjCn9wbmSmax9Bk7SOYT=w@mail.gmail.com>

Bezeq can replace the firmware without talking to you without being onsite,
so yes they have a backdoor in your router.

Personally I prefer using a decent wireless router of my own (running
openwrt preferably) and having a simple bezeq box connected to it's WAN
port, like that bezeq stays outside my network, and if they only had a
wireless bezeq box for whatever reason the Bezeq_free is guaranteed to be
100% separate from my network.

HTH,
Eliyahu - ?????

2014-11-23 23:02 GMT+02:00 Amos Shapira <amos.shapira at gmail.com>:

> There are various chrome tools, e.g. the Task Manager.
>
> On 24 November 2014 at 07:45, Amichai Rotman <amichai at iglu.org.il> wrote:
>
>> Hi All,
>>
>> I am trying to troubleshoot a bottleneck in my internet connection.
>>
>> I came across a few lines like these ones when I run 'netstat -ptW':
>>
>> tcp        0      0 10.0.0.3:42239
>>  82-166-201-152.barak-online.net:http ESTABLISHED 5881/chrome
>> tcp        0      0 10.0.0.3:55224
>>  bzq-179-180-121.static.bezeqint.net:https ESTABLISHED 5881/chrome
>>
>> I was once connected to these ISPs, but not for some time....
>>
>> I have Netgear DGN2200 v2 provided by Bezeq, running firmware
>>  V1.0.8.31_1.8.31.
>>
>> Does Bezeq and the ISPs open a backdoor in my router somehow?
>>
>> How can I find out exactly where I am connected and why?
>>
>> Thanks!
>>
>> Amichai
>>
>>
>> _______________________________________________
>> Linux-il mailing list
>> Linux-il at cs.huji.ac.il
>> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>>
>>
>
>
> --
> <http://au.linkedin.com/in/gliderflyer>
>
> _______________________________________________
> Linux-il mailing list
> Linux-il at cs.huji.ac.il
> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>
>
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From linux-il at shimi.net  Mon Nov 24 00:53:50 2014
From: linux-il at shimi.net (shimi)
Date: Mon, 24 Nov 2014 00:53:50 +0200
Subject: Backdoor?
In-Reply-To: <CAD_ZK65OUd4Kun4nVW54jS4OnPHnRvT6dKkJaDsqfpdQLNPuDg@mail.gmail.com>
References: <CAD_ZK65OUd4Kun4nVW54jS4OnPHnRvT6dKkJaDsqfpdQLNPuDg@mail.gmail.com>
Message-ID: <CAKnt4U_CJZYJ41CSwPsLg=OB06rPVDowhS7KKZDFKH8UX-RUnQ@mail.gmail.com>

On Sun, Nov 23, 2014 at 10:45 PM, Amichai Rotman <amichai at iglu.org.il>
wrote:

> Hi All,
>
> I am trying to troubleshoot a bottleneck in my internet connection.
>
> I came across a few lines like these ones when I run 'netstat -ptW':
>
> tcp        0      0 10.0.0.3:42239
>  82-166-201-152.barak-online.net:http ESTABLISHED 5881/chrome
>

This is a server on the Akamai CDN. Could be any website using Akamai. Use
a sniffer instead of netstat if you want to know what's going on.


> tcp        0      0 10.0.0.3:55224
>  bzq-179-180-121.static.bezeqint.net:https ESTABLISHED 5881/chrome
>
>
Using -n in netstat is advised; Some IPs have a reverse DNS without a
matching forward DNS. Anyways, this is likely 212.179.180.121.

Also known as:

$ host www.google.com | grep 212.179.180.121
www.google.com has address 212.179.180.121


> Does Bezeq and the ISPs open a backdoor in my router somehow?
>
> They could be, but this log is probably not showing the case.

-- Shimi
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From amichai at iglu.org.il  Mon Nov 24 16:27:08 2014
From: amichai at iglu.org.il (Amichai Rotman)
Date: Mon, 24 Nov 2014 16:27:08 +0200
Subject: Recommended Router w/ADSL Modem
Message-ID: <CAD_ZK66hvR19Q5XcZ16CdZKPmPP5CnMr9Wzp5UNX1A1_M5e88w@mail.gmail.com>

Can any of you recommend an off-the-shelf ADSL modem/router I can install
OpenWRT on?

My current router is a Netgear DGN2200 by Bezezeq.

Thanks!

Amichai

Sent from my Galaxy S3
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From esr+linux-il at g.jct.ac.il  Mon Nov 24 21:57:57 2014
From: esr+linux-il at g.jct.ac.il (E.S. Rosenberg)
Date: Mon, 24 Nov 2014 21:57:57 +0200
Subject: Linux install party @ HUJI
Message-ID: <CAHTx_BPceND_VNAQN+NeZOqU+9sTHRmeu7nxeoUE-xgrWi=RdA@mail.gmail.com>

There is currently some low key talk of arranging a linux install party for
new students (and others interested) at Givat Ram.

Nothing specific as yet, the TA still needs to get back to us whether or
not there is enough interest.

But I want to ask already if there is is enough interest are there people
on the list interested in helping out?

Thanks,
Eliyahu - ?????
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From dimidd at gmail.com  Mon Nov 24 22:32:33 2014
From: dimidd at gmail.com (Dimid Duchovny)
Date: Mon, 24 Nov 2014 22:32:33 +0200
Subject: Linux install party @ HUJI
In-Reply-To: <CAHTx_BPceND_VNAQN+NeZOqU+9sTHRmeu7nxeoUE-xgrWi=RdA@mail.gmail.com>
References: <CAHTx_BPceND_VNAQN+NeZOqU+9sTHRmeu7nxeoUE-xgrWi=RdA@mail.gmail.com>
Message-ID: <CANKvuDef_SKxpDErupMBVx-+FFw5VOOVhz8BNTw478-jrTiLgw@mail.gmail.com>

I'll be glad to help.

2014-11-24 21:57 GMT+02:00 E.S. Rosenberg <esr+linux-il at g.jct.ac.il>:

> There is currently some low key talk of arranging a linux install party
> for new students (and others interested) at Givat Ram.
>
> Nothing specific as yet, the TA still needs to get back to us whether or
> not there is enough interest.
>
> But I want to ask already if there is is enough interest are there people
> on the list interested in helping out?
>
> Thanks,
> Eliyahu - ?????
>
> _______________________________________________
> Linux-il mailing list
> Linux-il at cs.huji.ac.il
> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>
>
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From ladypine at gmail.com  Tue Nov 25 09:53:55 2014
From: ladypine at gmail.com (Orna Agmon Ben-Yehuda)
Date: Tue, 25 Nov 2014 09:53:55 +0200
Subject: Linux install party @ HUJI
In-Reply-To: <CAHTx_BPceND_VNAQN+NeZOqU+9sTHRmeu7nxeoUE-xgrWi=RdA@mail.gmail.com>
References: <CAHTx_BPceND_VNAQN+NeZOqU+9sTHRmeu7nxeoUE-xgrWi=RdA@mail.gmail.com>
Message-ID: <CAA8-RXhEpsRpNJDfw1dPdDKjwWhO3G7REjnP96UZTUOyHGV7xw@mail.gmail.com>

1. Good luck!
2. The last time we did an installation party, we actually did a
configuration party: people find it easy to install, but they sometimes
need special software, or have a problem installing it - that killer app
for which they set up linux to begin with.  It is also more interesting for
the volunteers. I suggest considering.

On Mon, Nov 24, 2014 at 9:57 PM, E.S. Rosenberg <esr+linux-il at g.jct.ac.il>
wrote:

> There is currently some low key talk of arranging a linux install party
> for new students (and others interested) at Givat Ram.
>
> Nothing specific as yet, the TA still needs to get back to us whether or
> not there is enough interest.
>
> But I want to ask already if there is is enough interest are there people
> on the list interested in helping out?
>
> Thanks,
> Eliyahu - ?????
>
> _______________________________________________
> Linux-il mailing list
> Linux-il at cs.huji.ac.il
> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>
>


-- 
Orna Agmon Ben-Yehuda.
http://ladypine.org
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From mordbe0 at gmail.com  Tue Nov 25 10:19:02 2014
From: mordbe0 at gmail.com (Mord Behar)
Date: Tue, 25 Nov 2014 10:19:02 +0200
Subject: Linux install party @ HUJI
In-Reply-To: <CAA8-RXhEpsRpNJDfw1dPdDKjwWhO3G7REjnP96UZTUOyHGV7xw@mail.gmail.com>
References: <CAHTx_BPceND_VNAQN+NeZOqU+9sTHRmeu7nxeoUE-xgrWi=RdA@mail.gmail.com>
 <CAA8-RXhEpsRpNJDfw1dPdDKjwWhO3G7REjnP96UZTUOyHGV7xw@mail.gmail.com>
Message-ID: <CAJzkJxH+JgdySybRx2JxuKa__AE8sNaZoO-n=rkMfhKvkVyVgg@mail.gmail.com>

On Tue, Nov 25, 2014 at 9:53 AM, Orna Agmon Ben-Yehuda <ladypine at gmail.com>
wrote:

> 1. Good luck!
> 2. The last time we did an installation party, we actually did a
> configuration party: people find it easy to install, but they sometimes
> need special software, or have a problem installing it - that killer app
> for which they set up linux to begin with.  It is also more interesting for
> the volunteers. I suggest considering.
>

I remember that. I think the last time there was an installation party (6
years ago?) was when I installed Linux on my laptop. And that introduced me
to the community...


>
> On Mon, Nov 24, 2014 at 9:57 PM, E.S. Rosenberg <esr+linux-il at g.jct.ac.il>
> wrote:
>
>> There is currently some low key talk of arranging a linux install party
>> for new students (and others interested) at Givat Ram.
>>
>> Nothing specific as yet, the TA still needs to get back to us whether or
>> not there is enough interest.
>>
>> But I want to ask already if there is is enough interest are there people
>> on the list interested in helping out?
>>
>> Thanks,
>> Eliyahu - ?????
>>
>> _______________________________________________
>> Linux-il mailing list
>> Linux-il at cs.huji.ac.il
>> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>>
>>
>
>
> --
> Orna Agmon Ben-Yehuda.
> http://ladypine.org
>
> _______________________________________________
> Linux-il mailing list
> Linux-il at cs.huji.ac.il
> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>
>
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From rabin at rabin.io  Tue Nov 25 16:28:09 2014
From: rabin at rabin.io (Rabin Yasharzadehe)
Date: Tue, 25 Nov 2014 16:28:09 +0200
Subject: Linux install party @ HUJI
In-Reply-To: <CAHTx_BPceND_VNAQN+NeZOqU+9sTHRmeu7nxeoUE-xgrWi=RdA@mail.gmail.com>
References: <CAHTx_BPceND_VNAQN+NeZOqU+9sTHRmeu7nxeoUE-xgrWi=RdA@mail.gmail.com>
Message-ID: <CABKuJEDDLYOn7uN-oXDeeF0-eUFw68k+4=+pmt_uK+XuJTrKCQ@mail.gmail.com>

I'm limited to only Sundays & Thursdays

but +1 for helping,


--
Rabin

On Mon, Nov 24, 2014 at 9:57 PM, E.S. Rosenberg <esr+linux-il at g.jct.ac.il>
wrote:

> There is currently some low key talk of arranging a linux install party
> for new students (and others interested) at Givat Ram.
>
> Nothing specific as yet, the TA still needs to get back to us whether or
> not there is enough interest.
>
> But I want to ask already if there is is enough interest are there people
> on the list interested in helping out?
>
> Thanks,
> Eliyahu - ?????
>
> _______________________________________________
> Linux-il mailing list
> Linux-il at cs.huji.ac.il
> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>
>
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From sara.fink at gmail.com  Tue Nov 25 18:44:54 2014
From: sara.fink at gmail.com (sara fink)
Date: Tue, 25 Nov 2014 18:44:54 +0200
Subject: BYOD in schools
In-Reply-To: <CAJzkJxEge67AhFcXNwiztNKfkWv=rHEhE7sWF++fam7n5UKusw@mail.gmail.com>
References: <CABe4FJC2dC+DaH2S5-tXjht9kkm8cB1F-aYeExmGTGCWi6VUHg@mail.gmail.com>
 <CAJzkJxEge67AhFcXNwiztNKfkWv=rHEhE7sWF++fam7n5UKusw@mail.gmail.com>
Message-ID: <CAKsgyTbDqBXxCNn278t39R_z6afQMDS=PUOsp+jd-vWzcK62aQ@mail.gmail.com>

Gabor, it's worse than that. I don't know what programs they want to
install, but I heard a talk on reshet bet few days ago (program of keren
noibach).

 First, they mentioned that it's not legal to ask the parents to buy
notebooks/tablets etc due to discrimination. There are parents who can't
afford it. So the ministry of education understood they made a mistake and
started to drop off the idea.

Second, technically they started to install some programs (before they
understood that their actions are not legal) and couldn't install
everything, because they are not well prepared. They have a mess there.

https://www.youtube.com/watch?v=H6NfZMlZoQ8
https://www.youtube.com/watch?v=fVfHaRNQD2A
http://www.ifat.com/VT/Trans.aspx?ID=6010393&CID=100456 ?????



On Wed, Nov 19, 2014 at 1:53 PM, Mord Behar <mordbe0 at gmail.com> wrote:

> I don't know about students, but my mother is a teacher and she has to use
> some legacy software that was written for Windows XP and fails on Win 7
> about 70% of the time. It's proprietary software written by the ministry
> for education and could not be easily ported to Linux.
>
> On Wed, Nov 19, 2014 at 11:38 AM, Gabor Szabo <gabor at szabgab.com> wrote:
>
>> In our school the management is trying to implement BYOD = Bring Your Own
>> Device
>>
>> Some details here:
>>
>> http://schooly.co.il/rabin-modiin/page.asp?page_parent=105646
>>
>> First they talked about tablets but now it seems they talk about making
>> us buy
>> notebooks.
>> Among many other issues, please note the technical requirements that
>> gives us a choice of operating system:
>> Windows 7 or Windows 8
>>
>> OTOH I could not find any information regarding the applications they
>> want to run.
>>
>> Do you have any information about similar projects in other schools in
>> Israel?
>> What kind of devices have they used? What kind of applications do they
>> install?
>>
>> Gabor
>>
>>
>> _______________________________________________
>> Linux-il mailing list
>> Linux-il at cs.huji.ac.il
>> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>>
>>
>
> _______________________________________________
> Linux-il mailing list
> Linux-il at cs.huji.ac.il
> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>
>
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From wickedpheonix at gmail.com  Tue Nov 25 22:10:34 2014
From: wickedpheonix at gmail.com (Ari Becker)
Date: Tue, 25 Nov 2014 20:10:34 +0000
Subject: Linux install party @ HUJI
References: <CAHTx_BPceND_VNAQN+NeZOqU+9sTHRmeu7nxeoUE-xgrWi=RdA@mail.gmail.com>
 <CABKuJEDDLYOn7uN-oXDeeF0-eUFw68k+4=+pmt_uK+XuJTrKCQ@mail.gmail.com>
Message-ID: <CAK2xwafk8C-KiKPFvYadJJbSY26zD2mRoeB+yagamiU5M6jZfA@mail.gmail.com>

Yeah, I'm also a weekends-only kinda guy, but if it fit with my schedule
then I could help.

On Tue, Nov 25, 2014, 16:29 Rabin Yasharzadehe <rabin at rabin.io> wrote:

> I'm limited to only Sundays & Thursdays
>
> but +1 for helping,
>
>
> --
> Rabin
>
> On Mon, Nov 24, 2014 at 9:57 PM, E.S. Rosenberg <esr+linux-il at g.jct.ac.il>
> wrote:
>
>> There is currently some low key talk of arranging a linux install party
>> for new students (and others interested) at Givat Ram.
>>
>> Nothing specific as yet, the TA still needs to get back to us whether or
>> not there is enough interest.
>>
>> But I want to ask already if there is is enough interest are there people
>> on the list interested in helping out?
>>
>> Thanks,
>> Eliyahu - ?????
>>
>> _______________________________________________
>> Linux-il mailing list
>> Linux-il at cs.huji.ac.il
>> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>>
>> _______________________________________________
> Linux-il mailing list
> Linux-il at cs.huji.ac.il
> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>
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From amichai at iglu.org.il  Tue Nov 25 22:36:06 2014
From: amichai at iglu.org.il (Amichai Rotman)
Date: Tue, 25 Nov 2014 22:36:06 +0200
Subject: Linux install party @ HUJI
In-Reply-To: <CAK2xwafk8C-KiKPFvYadJJbSY26zD2mRoeB+yagamiU5M6jZfA@mail.gmail.com>
References: <CAHTx_BPceND_VNAQN+NeZOqU+9sTHRmeu7nxeoUE-xgrWi=RdA@mail.gmail.com>
 <CABKuJEDDLYOn7uN-oXDeeF0-eUFw68k+4=+pmt_uK+XuJTrKCQ@mail.gmail.com>
 <CAK2xwafk8C-KiKPFvYadJJbSY26zD2mRoeB+yagamiU5M6jZfA@mail.gmail.com>
Message-ID: <CAD_ZK66_y6Y_B5fWs90MBxO5xV8XjxBC6eMhnRJ-M92fr+=DDQ@mail.gmail.com>

I'd be glad to help too.





2014-11-25 22:10 GMT+02:00 Ari Becker <wickedpheonix at gmail.com>:

> Yeah, I'm also a weekends-only kinda guy, but if it fit with my schedule
> then I could help.
>
>
> On Tue, Nov 25, 2014, 16:29 Rabin Yasharzadehe <rabin at rabin.io> wrote:
>
>> I'm limited to only Sundays & Thursdays
>>
>> but +1 for helping,
>>
>>
>> --
>> Rabin
>>
>> On Mon, Nov 24, 2014 at 9:57 PM, E.S. Rosenberg <esr+linux-il at g.jct.ac.il
>> > wrote:
>>
>>> There is currently some low key talk of arranging a linux install party
>>> for new students (and others interested) at Givat Ram.
>>>
>>> Nothing specific as yet, the TA still needs to get back to us whether or
>>> not there is enough interest.
>>>
>>> But I want to ask already if there is is enough interest are there
>>> people on the list interested in helping out?
>>>
>>> Thanks,
>>> Eliyahu - ?????
>>>
>>> _______________________________________________
>>> Linux-il mailing list
>>> Linux-il at cs.huji.ac.il
>>> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>>>
>>> _______________________________________________
>> Linux-il mailing list
>> Linux-il at cs.huji.ac.il
>> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>>
>
> _______________________________________________
> Linux-il mailing list
> Linux-il at cs.huji.ac.il
> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>
>
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From elazarl at gmail.com  Tue Nov 25 22:56:01 2014
From: elazarl at gmail.com (Elazar Leibovich)
Date: Tue, 25 Nov 2014 20:56:01 +0000
Subject: How do I benchmark a spin lock?
Message-ID: <CAHNTFmLapPm4dakZUpua0DPgpoAJ5CiO5dOpcxMpitBCRPyupw@mail.gmail.com>

The first question I have in mind, is, how do you define a lock benchmark?
Is your goal to minimize overhead? Is your goal to minimize the latency of
a successful uncontended acquire? Is your goal to minimize bus load for
other CPU when three CPUs are waiting for the spin lock?

What we're measuring is not well defined.

Looking at [0] (wow, So little have changed in SMP architectures since
1990!) and [1], gives a few options:

1) Measure the time it takes to perform a critical section *N* times
by *n *CPUs
concurrently.
2) Measure overhead. Compare the time it takes to a single CPU to do a task
*N* times with no locks. Do that with *n* CPUs, where the task is protected
by a spin lock. The time it took to do the task with spinlock, minus the
time it took to do it alone is the overhead.
3) Measure the overhead of other *m* CPUs doing a different task,
while *n* CPUs
are contending over a critical section.
4) Measure latency. This is a bit tricky to measure. What [1] suggests is,
measure the average time between two spin locks read. If I understand that
correctly, they measure the time it took to just check if the spinlock is
taken.
5) What I had in mind, is measuring how much time did it took from the time
a CPU released the lock, to the time another CPU held it. This is tricky to
do, since CPUs clocks are not always synchronized or cheap enough to check.

The devil's in the details, so even though [1] have a bird's eye view
description of the methodology, there are still missing details (e.g., did
they measure time or cycles?).

I'm far from expert on this matters, so I wonder:

Is there an industry standard for benchmarking a spinlock? Something like
JS octane. A benchmark which should mimic many real world scenarios?

If indeed there is, is there an open source implementation?

If there isn't, are there better papers describing spinlock benchmarking
methodology?

[0] http://homes.cs.washington.edu/~tom/pubs/spinlock.pdf
[1] http://www.ideal.ece.ufl.edu/workshops/wiosca08/paper2.pdf
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From mulix at mulix.org  Wed Nov 26 10:43:39 2014
From: mulix at mulix.org (Muli Ben-Yehuda)
Date: Wed, 26 Nov 2014 10:43:39 +0200
Subject: How do I benchmark a spin lock?
In-Reply-To: <CAHNTFmLapPm4dakZUpua0DPgpoAJ5CiO5dOpcxMpitBCRPyupw@mail.gmail.com>
References: <CAHNTFmLapPm4dakZUpua0DPgpoAJ5CiO5dOpcxMpitBCRPyupw@mail.gmail.com>
Message-ID: <20141126084339.GB2798@needle>

On Tue, Nov 25, 2014 at 08:56:01PM +0000, Elazar Leibovich wrote:

> The first question I have in mind, is, how do you define a lock
> benchmark?  Is your goal to minimize overhead? Is your goal to
> minimize the latency of a successful uncontended acquire? Is your
> goal to minimize bus load for other CPU when three CPUs are waiting
> for the spin lock?

Good questions all, but usually you want to focus on the important
case first. I would argue that for a spinlock, the most important case
is an uncontended acquire, since if most acquires are contended, then
you should redesign the code that uses the lock. The second most
important case is the contended acquire/contended release.

> What we're measuring is not well defined.
> 
> Looking at [0] (wow, So little have changed in SMP architectures since
> 1990!) and [1], gives a few options:
> 
> 1) Measure the time it takes to perform a critical section *N* times
> by *n *CPUs
> concurrently.

This is measuring the contended acquire/contended release.

> 2) Measure overhead. Compare the time it takes to a single CPU to do a task
> *N* times with no locks. Do that with *n* CPUs, where the task is protected
> by a spin lock. The time it took to do the task with spinlock, minus the
> time it took to do it alone is the overhead.

... is the overhead for *N* CPUs on this architecture. This is again
measuring the contended case.

> 3) Measure the overhead of other *m* CPUs doing a different task,
> while *n* CPUs are contending over a critical section.

This is measuring the interference caused by the bus traffic due to
the contention. It's interesting, but it's hard to know just form this
benchmark what is reasonable and what isn't, and how to improve the
results. A benchmark whose results aren't actionable is not as useful
as a benchmark where it's immediately obvious what you need to fix.

> Is there an industry standard for benchmarking a spinlock? Something
> like JS octane. A benchmark which should mimic many real world
> scenarios?

Not as far as I know. Locks are usually benchmarked using a
micro-benchmark that performs many acquires/releases in a loop with
exact details depending on how the lock is likely to be used "in
anger". Before benchmarking, you should first ask yourself
(1) how is this lock implementation likely to be used? (2) what are
the fast-path, common operations, and what are the slow-paths,
uncommon operations? And then benchmark the fast-path operations in a
setup that mimics how the implementation is likely to be used.

Cheers,
Muli


From elazarl at gmail.com  Wed Nov 26 18:22:23 2014
From: elazarl at gmail.com (Elazar Leibovich)
Date: Wed, 26 Nov 2014 16:22:23 +0000
Subject: How do I benchmark a spin lock?
References: <CAHNTFmLapPm4dakZUpua0DPgpoAJ5CiO5dOpcxMpitBCRPyupw@mail.gmail.com>
 <20141126084339.GB2798@needle>
Message-ID: <CAHNTFmKeQrT7QJPJMYuZ4KCK9cDeomgqz-a9V=ebRT3PP2ZVDg@mail.gmail.com>

Thanks! Great feedback.

I just want to quickly reference two points:

1) In a good designed systems, most of the times, the lock would be held
uncontended.
>From [0]: "it might seem that the behavior of multiprocessors when there is
contention for a spin lock is not important. A highly parallel application
will by definition have no lock with significant amount of contention,
since that would imply a sequential component. If an application has a lock
that is a bottleneck, the best alternative would be to redesign the
application's algorithms to eliminate the contention. In no case does it
make sense to add processors to an application if the end up only
spin-waiting.
There are, however, several situations where spin lock performance when
there is contention is important. Poor contention performance may prevent
an application with a heavily utilized lock from reaching its peak
performance, because the average number of spin-waiting processors will
become nontrivial as the lock approaches saturation. Furthermore, if
processors arrive at a lock in a burst, queue lengths can be temporarily
long, resulting in bad short-term performance, without the lock being a
long-term bottleneck.
alternately, it may not always be possible to tune a program to use the
optimal number of processors. An Operating system, for instance, has little
control over the rate at which users make operating system calls. At high
load, locks that are normally not a problem could become source of
contention. "

Measuring the uncontended case is a very good idea, but is not too
problematic.

2) The best benchmarking is performed by a looking at a real world use case
and simplifying it.

Agreed. This is the motherhood and apple pie of all benchmark. It is
however not always evident how the lock would be used exactly, even if you
are the one intending to use it. True, it'll be used to protect a short
critical section, where the cost of waiting is lower than the cost of a
context switch, but this is hardly enough to specify the use cases.

Instead of further discussion, I'd like to propose a simple practical
spinlock benchmark, which I think could be useful as a general measure, and
could be the baseline of more specific tests. I'll be grateful for any
feedback.

Design goals:
1) Benchmark should run on a reasonable OS. Requiring a special purpose
hardware would increase benchmark accuracy, but would make running it much
more difficult.
2) Running with an OS might distort the benchmark with context switches or
interrupt. To solve that, you can repeat the test multiple times and remove
outliers.
3) Should give a few simple outputs, so that lock designer could use the
results as a proxy for how to optimize the lock for his use case.
4) Initial design assumes x86 for brevity, but changes to other
architecture should be trivial.

Implementation:
Input parameters:
LENGTH estimated # cycles that the lock would be held.
N number of CPUs contending for the lock
1) Count cycles (e.g., r for uncontended acquire and release - that would
be the first output.
2) Measure the memory footprint of uncontended acquire and release - that
would be the second output. This can be done by invalidating the cache,
running lock acquire release, and reading cache misses from performance
counters. To eliminate other overhead, do the same with a NOP lock - this
would be the overhead.
That would be the second output.
3) Pin N threads to N different logical CPUs. We can afford ignoring
logical CPUs, since in most use cases you cannot ensure two threads would
run on different hardware cpus. Each CPU would pause for LENGTH cycles, by
running commands that do NOT use the memory bus.
4) Count time (e.g., rdtsc) from the time the first CPU acquired the lock,
to the time the last one did.
Do that by acquiring the lock, keeping the timestamp in a register,
releasing the lock, and then after a 1ms pause, writing this value to a
known location, so that writing the timestamp won't interfere with the
test. after 10ms, when all CPUS are definitely done with the benchmark.
The problem here is, the timestamps between CPUs might not be synchronized.
Possible solutions are:
4.a. Use HPET instead, than again the HPET overhead might distort the test
case.
4.b On newer Intel HW, I understand there's invariant tsc which can be a
solution. Not sure how portable would that be.
4.c Assuming the time drift is small, averaging over multiple experiments
might give a small enough standard deviation.
I'm not sure how much problematic would that be in practice.
5?) I'm not sure its possible, or meaningful, but one measure the memory
bus utilization during the lock contention. Maybe counting the total cache
misses for all CPUs while contending over the lock.

You'll end up with four actionable parameters:
CPU usage for the uncontended case.
Memory footprint for the uncontended case.
CPU overhead for the contended case
Memory bus usage (or a close proxy of it) in the contended case.

Then the user can choose what to optimize according to his use case.

I'll be glad for any feedback.

Thanks again.


On Wed Nov 26 2014 at 10:43:43 AM Muli Ben-Yehuda <mulix at mulix.org> wrote:

> On Tue, Nov 25, 2014 at 08:56:01PM +0000, Elazar Leibovich wrote:
>
> > The first question I have in mind, is, how do you define a lock
> > benchmark?  Is your goal to minimize overhead? Is your goal to
> > minimize the latency of a successful uncontended acquire? Is your
> > goal to minimize bus load for other CPU when three CPUs are waiting
> > for the spin lock?
>
> Good questions all, but usually you want to focus on the important
> case first. I would argue that for a spinlock, the most important case
> is an uncontended acquire, since if most acquires are contended, then
> you should redesign the code that uses the lock. The second most
> important case is the contended acquire/contended release.
>
> > What we're measuring is not well defined.
> >
> > Looking at [0] (wow, So little have changed in SMP architectures since
> > 1990!) and [1], gives a few options:
> >
> > 1) Measure the time it takes to perform a critical section *N* times
> > by *n *CPUs
> > concurrently.
>
> This is measuring the contended acquire/contended release.
>
> > 2) Measure overhead. Compare the time it takes to a single CPU to do a
> task
> > *N* times with no locks. Do that with *n* CPUs, where the task is
> protected
> > by a spin lock. The time it took to do the task with spinlock, minus the
> > time it took to do it alone is the overhead.
>
> ... is the overhead for *N* CPUs on this architecture. This is again
> measuring the contended case.
>
> > 3) Measure the overhead of other *m* CPUs doing a different task,
> > while *n* CPUs are contending over a critical section.
>
> This is measuring the interference caused by the bus traffic due to
> the contention. It's interesting, but it's hard to know just form this
> benchmark what is reasonable and what isn't, and how to improve the
> results. A benchmark whose results aren't actionable is not as useful
> as a benchmark where it's immediately obvious what you need to fix.
>
> > Is there an industry standard for benchmarking a spinlock? Something
> > like JS octane. A benchmark which should mimic many real world
> > scenarios?
>
> Not as far as I know. Locks are usually benchmarked using a
> micro-benchmark that performs many acquires/releases in a loop with
> exact details depending on how the lock is likely to be used "in
> anger". Before benchmarking, you should first ask yourself
> (1) how is this lock implementation likely to be used? (2) what are
> the fast-path, common operations, and what are the slow-paths,
> uncommon operations? And then benchmark the fast-path operations in a
> setup that mimics how the implementation is likely to be used.
>
> Cheers,
> Muli
>
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From guysoft42 at gmail.com  Sat Nov 29 12:52:36 2014
From: guysoft42 at gmail.com (Guy Sheffer)
Date: Sat, 29 Nov 2014 12:52:36 +0200
Subject: Linux install party @ HUJI
In-Reply-To: <CAHTx_BPceND_VNAQN+NeZOqU+9sTHRmeu7nxeoUE-xgrWi=RdA@mail.gmail.com>
References: <CAHTx_BPceND_VNAQN+NeZOqU+9sTHRmeu7nxeoUE-xgrWi=RdA@mail.gmail.com>
Message-ID: <CAPuudXggj6iuEnz=kH7LJvN3okFcSpBxh8hYLiJD=wFqw+ASxw@mail.gmail.com>

Hey Guys,
If you need any help I can do my best. I am busy as hell these days but
would love to come and help for old times sake :)

Guy Sheffer
On Nov 24, 2014 9:58 PM, "E.S. Rosenberg" <esr+linux-il at g.jct.ac.il> wrote:

> There is currently some low key talk of arranging a linux install party
> for new students (and others interested) at Givat Ram.
>
> Nothing specific as yet, the TA still needs to get back to us whether or
> not there is enough interest.
>
> But I want to ask already if there is is enough interest are there people
> on the list interested in helping out?
>
> Thanks,
> Eliyahu - ?????
>
> _______________________________________________
> Linux-il mailing list
> Linux-il at cs.huji.ac.il
> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>
>
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From eli at billauer.co.il  Sat Nov 29 17:35:17 2014
From: eli at billauer.co.il (Eli Billauer)
Date: Sat, 29 Nov 2014 17:35:17 +0200
Subject: [HAIFUX LECTURE] Topics in advanced Python -- Hai Zaar
Message-ID: <5479E7B5.6030507@billauer.co.il>

On Monday, December 1st at 18:30, Haifux will gather to hear a talk by Hai Zaar:

    Topics in advanced Python

Abstract

    * (Advanced) decorators
    * Descriptors
    * Multiple inheritance
    * The magic of "type"
    * Metaclasses
    * Slots vs dictionaries
    * Generators in depth
    * Async programming

=================================================================

We meet in Taub building, room 6. For instructions see:
http://www.haifux.org/where.html

Attendance is free, and you are all invited!

==================================================================
Future lectures:

There are no scheduled lectures.


==================================================================

We are always interested in hearing your talks and ideas. If you wish to give a talk, hold a discussion, or just plan some event haifux might be interested in, please contact us atwebmaster at haifux.org

-- 
Web:http://www.billauer.co.il