Bug 168666

Summary:	sys-process/time: Monitoring memory usage does not work
Product:	Gentoo Linux	Reporter:	Christian Schlotter <again>
Component:	Current packages	Assignee:	Gentoo's Team for Core System packages <base-system>
Status:	RESOLVED INVALID
Severity:	normal
Priority:	High
Version:	2006.1
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description Christian Schlotter 2007-02-28 00:23:24 UTC

Hi!

GNU Time has the advantage of being able to monitor more than just execution times.  However, if I try to monitor the maximum memory used by some program, it always shows that as zero.

Example:
$ /usr/bin/time --format="maxmem %MkB" thunderbird
No running windows found
maxmem 0kB

Best regards
Christian

Comment 1 SpanKY gentoo-dev

2007-02-28 14:57:33 UTC

prob best if you try reporting to these guys:
http://directory.fsf.org/time.html

Comment 2 Christian Schlotter 2007-02-28 15:41:14 UTC

OK, I took a look at the code and -- most importantly -- at the getrusage manpage:
"Not all fields are meaningful under Linux.  In linux 2.4 only the fields  ru_utime, ru_stime, ru_minflt, and ru_majflt are maintained.  Since Linux 2.6, ru_nvcsw and ru_nivcsw are also maintained"

%M would require the ru_maxrss field to be maintained.  Resolving this bug as invalid.