getrusage(3) works just fine. However, it returned 0 for memory usage. A quote from the man page:"The above struct was taken from BSD 4.3 Reno. Not all fields are meaningful under Linux. Right now (Linux 2.4, 2.6) only the fields ru_utime, ru_stime, ru_minflt, ru_majflt, and ru_nswap are maintained."
(This refers to
struct rusage, filled in by the getrusage() function.)The question is why? At least some of memory statistics that should be returned by
getrusage() can already be obtained through /proc/*/stat.Tags: kernel linux
2 comments:
Hi. Excellent question -- why can't I get a process' memory usage (RSS, code/text size, stack/data size, etc) by calling getrusage() in Linux? If anyone out there knows of an equivalent system call, PLEASE tell me. And no, I don't want to dig it out of /proc... that is slow and hoakey. There should be a system call for this...
I agree. I'd like to see a working getrusage for process memory consumption. Why, I needed it just today ...
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