Messages in this thread Patch in this message | | | Date | Sun, 9 May 2010 08:24:03 -0700 | From | Arjan van de Ven <> | Subject | [PATCH v2 4/8] sched: Fold updating of the last_update_time_info into update_ts_time_stats() |
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From: Arjan van de Ven <arjan@linux.intel.com>
This patch folds the updating of the last_update_time into the update_ts_time_stats() function, and updates the callers.
This allows for further cleanups that are done in the next patch.
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> ---
kernel/time/tick-sched.c | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-)
diff -puN kernel/time/tick-sched.c~sched-fold-updating-of-the-last-update-time-into-update_ts_time_stats kernel/time/tick-sched.c --- a/kernel/time/tick-sched.c~sched-fold-updating-of-the-last-update-time-into-update_ts_time_stats +++ a/kernel/time/tick-sched.c @@ -153,7 +153,8 @@ static void tick_nohz_update_jiffies(kti /* * Updates the per cpu time idle statistics counters */ -static void update_ts_time_stats(struct tick_sched *ts, ktime_t now) +static void +update_ts_time_stats(struct tick_sched *ts, ktime_t now, u64 *last_update_time) { ktime_t delta; @@ -163,13 +164,19 @@ static void update_ts_time_stats(struct ts->idle_sleeptime = ktime_add(ts->idle_sleeptime, delta); ts->idle_entrytime = now; } + + if (ts->idle_active && last_update_time) + *last_update_time = ktime_to_us(ts->idle_lastupdate); + else + *last_update_time = ktime_to_us(now); + } static void tick_nohz_stop_idle(int cpu, ktime_t now) { struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu); - update_ts_time_stats(ts, now); + update_ts_time_stats(ts, now, NULL); ts->idle_active = 0; sched_clock_idle_wakeup_event(0); @@ -181,7 +188,7 @@ static ktime_t tick_nohz_start_idle(stru now = ktime_get(); - update_ts_time_stats(ts, now); + update_ts_time_stats(ts, now, NULL); ts->idle_entrytime = now; ts->idle_active = 1; @@ -206,18 +213,11 @@ static ktime_t tick_nohz_start_idle(stru u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time) { struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu); - ktime_t now; if (!tick_nohz_enabled) return -1; - now = ktime_get(); - update_ts_time_stats(ts, now); - - if (ts->idle_active) - *last_update_time = ktime_to_us(ts->idle_lastupdate); - else - *last_update_time = ktime_to_us(now); + update_ts_time_stats(ts, ktime_get(), last_update_time); return ktime_to_us(ts->idle_sleeptime); } _
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