Package: procps Version: 1:3.2.7-8 The top command show used memory size incorrectly if an application use threads.
There is a test c-file in the attachment which runs 350 threads. The top command on my system shows that compiled from this file 'test' application used in 2 times more memory than it is. And if you apply ps command to detect used memory size then you will see that really used just 0.1% of memory from available size. The top command in the %MEM field show the size correctly (0.1%), but the value in the DATA field is wrong. It's obvious that the problem is that the top command get the wrong value by the following way. It's multiply the one thread size on the threads quantity. -- ... mpd is off . ''`. Dmitry E. Oboukhov : :’ : [EMAIL PROTECTED] `. `~’ GPGKey: 1024D / F8E26537 2006-11-21 `- 1B23 D4F8 8EC0 D902 0555 E438 AB8C 00CF F8E2 6537
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
void thread_foo(void * data)
{
int num=*(int *)data;
int i;
int pause=100+random()%10000;
while(1)
{
for (i=0; i<num+10; i++) usleep(pause);
}
}
int main(void)
{
int i;
pthread_t h;
for (i=0; i<350; i++)
{
pthread_create (&h, NULL, (void *)&thread_foo, &i);
usleep(500);
}
thread_foo(&i);
}
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