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| author | Ingo Molnar <mingo@elte.hu> | 2007-08-23 15:18:02 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2007-08-23 15:18:02 +0200 |
| commit | 2aa44d0567ed21b47b87d68819415d48194cb923 (patch) | |
| tree | 7be2a8a30a23b363e1e2aecd41934e75f581e115 /kernel/sched_debug.c | |
| parent | b377fd3982ad957c796758a90e2988401a884241 (diff) | |
| download | lwn-2aa44d0567ed21b47b87d68819415d48194cb923.tar.gz lwn-2aa44d0567ed21b47b87d68819415d48194cb923.zip | |
sched: sched_clock_idle_[sleep|wakeup]_event()
construct a more or less wall-clock time out of sched_clock(), by
using ACPI-idle's existing knowledge about how much time we spent
idling. This allows the rq clock to work around TSC-stops-in-C2,
TSC-gets-corrupted-in-C3 type of problems.
( Besides the scheduler's statistics this also benefits blktrace and
printk-timestamps as well. )
Furthermore, the precise before-C2/C3-sleep and after-C2/C3-wakeup
callbacks allow the scheduler to get out the most of the period where
the CPU has a reliable TSC. This results in slightly more precise
task statistics.
the ACPI bits were acked by Len.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'kernel/sched_debug.c')
| -rw-r--r-- | kernel/sched_debug.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/sched_debug.c b/kernel/sched_debug.c index 87e524762b85..ab18f45f2ab2 100644 --- a/kernel/sched_debug.c +++ b/kernel/sched_debug.c @@ -154,10 +154,11 @@ static void print_cpu(struct seq_file *m, int cpu) P(next_balance); P(curr->pid); P(clock); + P(idle_clock); P(prev_clock_raw); P(clock_warps); P(clock_overflows); - P(clock_unstable_events); + P(clock_deep_idle_events); P(clock_max_delta); P(cpu_load[0]); P(cpu_load[1]); |