Very Computer

It looks like LinuxThreads package is not allowing more than
1024 pthread_create calls, even if the earlier threads are
detached. Probably the detach functionality is not working
properly. Trying this with DETACH attributes does not help
either. The following program is not able to create threads
after the 1022nd call. This works fine Solaris 2.6.

Huseyin

RedHat Linux 5.1
glibc 2.0.7 (with LinuxThreads)

/* gcc -g -O -Wall  -D_REENTRANT  -o ex ex.c -lpthread */

#include <stdio.h>
#include <unistd.h>
#include <pthread.h>

void * process(void * arg)
{
  int rv;
  rv = pthread_detach(pthread_self());
  fprintf(stderr, "Starting process %d detach rv %d \n", (int) arg, rv);
  return NULL;

Quote:}

int main()
{
  int retcode;
  pthread_t ths[1040];
  int i;

  for(i=0; i < 1040; i++) {
    retcode = pthread_create(&ths[i], NULL, process, (void*) i);
    if (retcode != 0)
      fprintf(stderr, "create failed for %d %d\n", i, retcode);
    usleep(10000);
  }

  return 0;

Quote:}

They've probably added one of the patches floating around for glibc
2.1 added to the 2.0.7 version for LinuxThreads.  The patched turned
out to be buggy.  I've not yet backported the solution to 2.0.7 but
will do sometime soon and the Debian/RedHat guys will make new
versions available shortly after this (presumably).

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