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Date: Tue, 07 Jul 2009 19:41:53 +0200
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Xenomai-help] pthread_create memory size
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To: Yigal Goldberger <yigal_gold@domain.hid>
Cc: Xenomai help <xenomai@xenomai.org>

Yigal Goldberger wrote:
> Hi Gilles,
> Thanks for your quick reply.
> I'd like to give some more details based on some expirements I've made .
> I tried an older version of linux and xenomai (linux 2.6.14.7 ) and when I enlarged the requested stack size to 32KB instead of 8KB I saw a **dramatic** reduction in memory consumption per thread (~30MB less!!!).
> I saw that there is some minimum stack size that if trying to create a thread with a smaller value will end up with the default (2MB ?) .
> This improved to some extent the memory usage of my application also in the new version (linux 2.6.29 + new xenoami - recently ported to mpc8272ads by DENX ) , but I am getting the following :
> 
> 2.6.14.7 :
> application usage :  ~31MB
> 
> 
> 2.6.29.4
> application usage : ~180MB 
> 
> The application is the same in both versions , so I can't think of where ~150MB are comming from ?

As I told you in the previous mail, see /proc/pid/maps to see how the
memory is spent.

-- 
					    Gilles.