* [RFC,PATCH 0/2] cputimers/proc: can't we make /proc/pid/stat less accurate?
@ 2010-03-24 20:45 Oleg Nesterov
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From: Oleg Nesterov @ 2010-03-24 20:45 UTC (permalink / raw)
To: Andrew Morton, Americo Wang, Balbir Singh, Eric W. Biederman,
Hidetoshi Seto, Ingo Molnar, Peter Zijlstra, Roland McGrath,
Spencer Candland, Stanislaw Gruszka
Cc: linux-kernel
Mostly to provoke the discussion and untested, please comment.
In short: I do not actually know if /proc/pid/stat should be "really"
accurate wrt cpu accounting. I mean, I don't know how much /bin/top
and friends depend on xtime monotonicity.
However, it is sad that /proc/pid/stat iterates over ->thread_group
_twice_ under ->siglock.
Any thoughts?
Oleg.
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2010-03-24 20:45 [RFC,PATCH 0/2] cputimers/proc: can't we make /proc/pid/stat less accurate? Oleg Nesterov
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