Re: [PATCH 0/3] [PATCH] more sched_clock updates

From: Ingo Molnar
Date: Fri Jul 11 2008 - 09:59:25 EST



* Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:

> ftrace is still seeing jumps in the sched_clock.c code that is not
> seen in using sched_clock() function itself. The following patches fix
> some of the issues that I've seen. There is still a slight drift but
> all my attempts to remove it completely have failed. Patch 3 does the
> best sofar at keeping the jumps to a minimum.

cool stuff! I've created a new -tip topic branch for your sched-clock
fixes and enhancements, under tip/sched/clock, and have picked up your
patches:

Steven Rostedt (7):
sched_clock: record from last tick
sched_clock: widen the max and min time
sched_clock: stop maximum check on NO HZ
sched_clock: fix calculation of other CPU
sched_clock: only update deltas with local reads.
sched_clock: record TSC after gtod
sched_clock: and multiplier for TSC to gtod drift

thanks,

Ingo
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