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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