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authorArjan van de Ven <arjan@linux.intel.com>2010-05-09 08:25:23 -0700
committerIngo Molnar <mingo@elte.hu>2010-05-09 19:35:27 +0200
commit0224cf4c5ee0d7faec83956b8e21f7d89e3df3bd (patch)
treedaac87f9766d1a6c71bcff021414d3deaae40da1 /kernel/time/timer_list.c
parente0e37c200f1357db0dd986edb359c41c57d24f6e (diff)
downloadlinaro-lsk-0224cf4c5ee0d7faec83956b8e21f7d89e3df3bd.tar.gz
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.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/time/timer_list.c b/kernel/time/timer_list.c
index 1a4a7dd7877..ab8f5e33fa9 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);