Problems with threads limit.

I'm making multithread server on Linux. Everything works fine, but
server reaches threads limint and cannot create any one more. I've
wrote simple test code to test this problem.

#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>

using namespace std;

>
Every time around 380 thread my program fails creating threads. How fix
it?

I'm making multithread server on Linux.

I'm making multithread server on Linux. Everything works fine, but
server reaches threads limint and cannot create any one more. I've
wrote simple test code to test this problem.

#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>

using namespace std;
pthread_mutex_t mutex1 = PTHREAD_MUTEX_I NITIALIZER;
int counter = 0;

void *print_message_ function( void *ptr )
{
char *message;
message = (char *) ptr;
pthread_mutex_l ock( &mutex1 );
counter++;
int nr = counter;
printf("Thread ID: %d \n", nr);
pthread_mutex_u nlock( &mutex1 );
}

main()
{
char *message1 = "Thread";
int iret1;

for (int i = 0; i < 400; i++)
{
pthread_t *thread1 = new pthread_t;

if (iret1 = pthread_create( thread1, NULL,
print_message_f unction, (void *) message1))
{
printf("Thread creation failed: %d\n", iret1);
}
}

exit(0);
}

Got results like this:

pawka@pawka-desktop:~/Darbai$ g++ -lpthread test.cpp -o test
pawka@pawka-desktop:~/Darbai$ ./test
Thread ID: 1
Thread ID: 2
Thread ID: 3
<...>
Thread ID: 378
Thread ID: 379
Thread ID: 380
Thread creation failed: 12
Thread creation failed: 12
Thread creation failed: 12
<...>

Every time around 380 thread my program fails creating threads. How fix
it?

>
Every time around 380 thread my program fails creating threads. How fix
it?

pa****@gmail.co m wrote:

>>
Every time around 380 thread my program fails creating threads. How fix
it?

Linux doesn't run on anything big enough to justify 380 threads!

I'm making multithread server on Linux. Everything works fine, but
server reaches threads limint and cannot create any one more. I've
wrote simple test code to test this problem.

Ian Collins wrote:

>>pa****@gmail. com wrote:

>>>Every time around 380 thread my program fails creating threads. How fix
it?

Linux doesn't run on anything big enough to justify 380 threads!

Well... it runs on mainframes with thousands of CPUs. But I doubt the OP is
using one of those.

>>>Linux doesn't run on anything big enough to justify 380 threads!

Well... it runs on mainframes with thousands of CPUs. But I doubt the OP
is using one of those.

With a single kernel instance?