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| author | Arjan van de Ven <arjan@linux.intel.com> | 2010-05-09 08:25:23 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-05-09 19:35:27 +0200 |
| commit | 0224cf4c5ee0d7faec83956b8e21f7d89e3df3bd (patch) | |
| tree | daac87f9766d1a6c71bcff021414d3deaae40da1 /kernel/time/timer_list.c | |
| parent | e0e37c200f1357db0dd986edb359c41c57d24f6e (diff) | |
| download | lwn-0224cf4c5ee0d7faec83956b8e21f7d89e3df3bd.tar.gz lwn-0224cf4c5ee0d7faec83956b8e21f7d89e3df3bd.zip | |
sched: Intoduce get_cpu_iowait_time_us()
For the ondemand cpufreq governor, it is desired that the iowait
time is microaccounted in a similar way as idle time is.
This patch introduces the infrastructure to account and expose
this information via the get_cpu_iowait_time_us() function.
[akpm@linux-foundation.org: fix CONFIG_NO_HZ=n build]
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Rik van Riel <riel@redhat.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: davej@redhat.com
LKML-Reference: <20100509082523.284feab6@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/time/timer_list.c')
| -rw-r--r-- | kernel/time/timer_list.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/time/timer_list.c b/kernel/time/timer_list.c index 1a4a7dd78777..ab8f5e33fa92 100644 --- a/kernel/time/timer_list.c +++ b/kernel/time/timer_list.c @@ -176,6 +176,7 @@ static void print_cpu(struct seq_file *m, int cpu, u64 now) P_ns(idle_waketime); P_ns(idle_exittime); P_ns(idle_sleeptime); + P_ns(iowait_sleeptime); P(last_jiffies); P(next_jiffies); P_ns(idle_expires); |