Messages in this thread | | | Date | Tue, 15 Aug 2006 20:22:19 +0200 | From | Willy Tarreau <> | Subject | Re: Maximum number of processes in Linux |
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On Tue, Aug 15, 2006 at 02:22:02PM -0400, linux-os (Dick Johnson) wrote: > > On Tue, 15 Aug 2006, Irfan Habib wrote: > > > Hi, > > > > What is the maximum number of process which can run simultaneously in > > linux? I need to create an application which requires 40,000 threads. > > I was testing with far fewer numbers than that, I was getting > > exceptions in pthread_create > > > > Regards > > Irfan > > #include <stdio.h> > int main(){ > unsigned long i; ^^^^^^^^^^^^^^^^
> while(fork() != -1) > i++; > printf("%u\n", i); > return 0; > } > $ gcc -o xxx xxx.c > $ ./xxx > > 1251392833 <<---- At least this number
Dick, would you please initialize your local variables when you send examples like this ? You should have been amazed by one billion processes on your box, at least.
> 1251392834 > 1251392834 > 1251392834 > 1251392834 > 1251392833 > 1251392833 > 1251392834 > 1251392834 > 1251392834 > ^C > $ killall xxx > > BYW 40,000 threads? 40,000 tasks all sharing the same address space? > Hopefully this is just a training exercise to see if it's possible. > > Cheers, > Dick Johnson > Penguin : Linux version 2.6.16.24 on an i686 machine (5592.62 BogoMips). > New book: http://www.AbominableFirebug.com/
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