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Date: Mon, 25 Mar 2002 10:10:49 +0100
From: Peter =?ISO-8859-1?Q?W=E4chtler?= <pwaechtler@loewe-komp.de>
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To: Bill Davidsen <davidsen@tmr.com>
CC: James Bourne <jbourne@MtRoyal.AB.CA>,
        Davide Libenzi <davidel@xmailserver.org>,
        David Schwartz <davids@webmaster.com>, joeja@mindspring.com,
        "linux-kernel@vger.redhat.com" <linux-kernel@vger.kernel.org>
Subject: Re: max number of threads on a system
In-Reply-To: <Pine.LNX.4.44.0203220840280.14699-100000@skuld.mtroyal.ab.ca> <Pine.LNX.3.96.1020322221213.24536A-100000@gatekeeper.tmr.com>
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Bill Davidsen wrote:

> On Fri, 22 Mar 2002, James Bourne wrote:
> 
> 
>>One thing to note here, using pthreads there is a limit of 1024
>>threads per process.  There are patches to glibc to increase this
>>to a larger number (4096 or 8192).
>>
> 
>   Haven't checked to see the limit in NGPT, but I haven't hit it ;-)
> 

There is another limit creeping in: pthread mmap()s 2 MB
of stack for each thread. So you run out of address space
on 32 bit systems with threads > 1024 (and smaller)





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