Re: Maximum number of processes in Linux

["linux-os \(Dick Johnson\)" <linux-os@analogic.com>]

On Tue, 15 Aug 2006, 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
> 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/
> _
> 


I blew it here...
     unsigned long i = 0;
...required.



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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