Hi,
I am trying to programatically determine the heap usage of a process.
The idea is that when the heap grows beyond a point, the process gives
up some of the memory it has allocated.
Looks like getrusage() won't help.
I tried reading /proc/$$/psinfo. But that does not seem to be useful.
This is what I tried:
prpsinfo_t ps;
sprintf(proc,"/proc/%d/psinfo", getpid());
for(i = 0; i < 100; i++) {
if ((fd = open(proc, O_RDONLY)) == -1) {
perror("open");
exit(1);
}
if(read(fd, &ps, sizeof(ps)) == -1) {
perror("read");
exit(2);
}
close(fd);
if( i == 0 || i == 99)
printf("%lu, %lu\n", ps.pr_rssize, ps.pr_byrssize);
malloc(1024 * (i+1));
}
The output is like this:
bash-3.00# ./rss
3561889832, 134509752
3561889832, 134509752
It does not show a change in pr_rssize. Is my understanding of pr_rssize
wrong? Any clue as to what might be wrong?
Regards,
Manoj
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