Messages in this thread | | | Date | Tue, 15 Aug 2006 21:13:57 +0200 | From | Willy Tarreau <> | Subject | Re: Maximum number of processes in Linux |
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On Tue, Aug 15, 2006 at 03:13:35PM -0400, linux-os (Dick Johnson) wrote: > > On Tue, 15 Aug 2006, Willy Tarreau wrote: > > > 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 > > [SNIPPED bad stuff] > > > > > 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. > > > > > Yep.... > > #include <stdio.h> > #include <signal.h> > int main() > { > unsigned long i; > for(i = 0; ; i++) > { > switch(fork()) > { > case 0: // kid > pause(); > break; > case -1: // Failed > printf("%lu\n", i); > kill(0, SIGTERM); > exit(0); > default: > break; > } > } > return 0; > } > > Shows a consistent 6140.
Better ! :-)
1) how much memory do you have ? 2) Would you try with clone() instead of fork(), you should get more because everything will be shared.
Regards, Willy
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