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Hi
This is my example of pthread not releasing memory resources when the thread
function exits (I would REALLY like to have that memory back).
I have written (copied and modified...) a small program that creates 200
threads which exit after 10 seconds.
The main function then sleeps for 20 seconds, allowing me/you to ps aux |
grep <progname> to see the big vsize increase.
You can clearly see (below the source) that even though the functions exit,
memory is not released. Both the vsize and the rss stay the same.
I am supposed to call a certain function to have the memory released?
This is my example of pthread not releasing memory resources when the thread
function exits (I would REALLY like to have that memory back).
I have written (copied and modified...) a small program that creates 200
threads which exit after 10 seconds.
The main function then sleeps for 20 seconds, allowing me/you to ps aux |
grep <progname> to see the big vsize increase.
You can clearly see (below the source) that even though the functions exit,
memory is not released. Both the vsize and the rss stay the same.
I am supposed to call a certain function to have the memory released?
Isaac (Itzik) Aaron
Quality Bytes
TEL: +972-3-952 3175
FAX: +972-3-952
3176
---- Snip, paste,
compile and watch...
#include <pthread.h>
void first_function(int *);
void second_function(int *);
int j;
main()
{
int i;
pthread_t thread1, thread2;
for (i=0;i<100; i++) {
pthread_create(&thread1, NULL, (void*) first_function, (void*)&i);
pthread_create(&thread2, NULL, (void*) second_function, (void*)&i);
usleep(100);
}
sleep(20);
}
void first_function(int *num)
{
int x,y,z;
printf("Entered first_function %d\n", *num);
sleep(10);
printf("Exited first_function\n", *num);
}
void second_function(int *num)
{
int x,y,z;
printf("Entered second_function %d\n", *num);
sleep(10);
printf("Exited second_function %d\n", *num);
}
[e-tsik@qbserv e-tsik]$ ps aux | grep pthread
e-tsik 25556 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25557 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25682 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25683 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25684 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25685 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25686 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25687 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25688 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25689 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25690 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25691 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25692 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25693 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25694 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25695 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25696 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25697 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25704 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25705 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25706 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25707 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25708 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25709 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25710 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25711 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25712 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25713 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25714 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25715 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25716 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25717 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25718 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25719 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25720 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25721 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25722 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25723 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25730 0.0 0.9 411052 1256 pts/4 S 07:34 0:00 /pthread
e-tsik 25731 0.0 0.9 411052 1256 pts/4 S 07:34 0:00 /pthread
e-tsik 25732 0.0 0.9 411052 1256 pts/4 S 07:34 0:00 /pthread
e-tsik 25733 0.0 0.9 411052 1256 pts/4 S 07:34 0:00 /pthread
e-tsik 25734 0.0 0.9 411052 1256 pts/4 S 07:34 0:00 /pthread
e-tsik 25735 0.0 0.9 411052 1256 pts/4 S 07:34 0:00 /pthread
e-tsik 25736 0.0 0.9 411052 1256 pts/4 S 07:34 0:00 /pthread
e-tsik 25737 0.0 0.9 411052 1256 pts/4 S 07:34 0:00 /pthread
e-tsik 25738 0.0 0.9 411052 1256 pts/4 S 07:34 0:00 /pthread
e-tsik 25739 0.0 0.9 411052 1256 pts/4 S 07:34 0:00 /pthread
e-tsik 25740 0.0 0.9 411052 1256 pts/4 S 07:34 0:00 /pthread
e-tsik 25741 0.0 0.9 411052 1256 pts/4 S 07:34 0:00 /pthread
e-tsik 25742 0.0 0.9 411052 1256 pts/4 S 07:34 0:00 /pthread
e-tsik 25743 0.0 0.9 411052 1256 pts/4 S 07:34 0:00 /pthread
e-tsik 25744 0.0 0.9 411052 1256 pts/4 S 07:34 0:00 /pthread
e-tsik 25745 0.0 0.9 411052 1256 pts/4 S 07:34 0:00 /pthread
e-tsik 25746 0.0 0.9 411052 1256 pts/4 S 07:34 0:00 /pthread
e-tsik 25747 0.0 0.9 411052 1256 pts/4 S 07:34 0:00 /pthread
e-tsik 25748 0.0 0.9 411052 1256 pts/4 S 07:34 0:00 /pthread
e-tsik 25749 0.0 0.9 411052 1256 pts/4 S 07:34 0:00 /pthread
[e-tsik@qbserv e-tsik]$ ps aux | grep pthread
e-tsik 25556 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 ./pthread
e-tsik 25557 0.0 0.9 411052 1256 pts/4 S 07:33 0:00 /pthread
e-tsik 25769 0.0 0.4 1708 596 pts/7 R 07:34 0:00 grep pthread
BEGIN:VCARD VERSION:2.1 N:Aaron;Isaac (Itzik) FN:Isaac (Itzik) Aaron ORG:Quality Bytes Software LTD TITLE:Head of Development TEL;WORK;VOICE:+972 (3) 952 3175 TEL;CELL;VOICE:+972 (53) 33 22 14 TEL;WORK;FAX:+972 (3) 952 3176 ADR;WORK:;;10 Moshe Levi st.;Rishon Lezziyon;;;Israel LABEL;WORK;ENCODING=QUOTED-PRINTABLE:10 Moshe Levi st.=0D=0ARishon Lezziyon=0D=0AIsrael URL: URL:http://www.q-bytes.com EMAIL;PREF;INTERNET:[EMAIL PROTECTED] REV:20010814T082349Z END:VCARD
