diff options
| author | Junjie Wu <junjiew@codeaurora.org> | 2014-08-15 16:34:37 -0700 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2016-02-16 13:53:06 -0800 |
| commit | 4db1f0ac8761fc30d4e1230939d623a52517bdcc (patch) | |
| tree | c497d951b8c7c5cb58c111a2080297eb346a7d3e | |
| parent | 16e989d788451c5ed3fb0e0a4dd9ee84de23d616 (diff) | |
cpufreq: interactive: Round up timer_rate to match jiffy
Timers are scheduled in unit of jiffies. Round up timer_rate so that
it matches the actual sampling period.
Change-Id: I88386a5a448e40333f9a9b9f0cf72af58cb54656
Signed-off-by: Junjie Wu <junjiew@codeaurora.org>
| -rw-r--r-- | drivers/cpufreq/cpufreq_interactive.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/cpufreq/cpufreq_interactive.c b/drivers/cpufreq/cpufreq_interactive.c index 49f206e48aa3..6bbcc905bb3e 100644 --- a/drivers/cpufreq/cpufreq_interactive.c +++ b/drivers/cpufreq/cpufreq_interactive.c @@ -855,12 +855,18 @@ static ssize_t store_timer_rate(struct cpufreq_interactive_tunables *tunables, const char *buf, size_t count) { int ret; - unsigned long val; + unsigned long val, val_round; ret = strict_strtoul(buf, 0, &val); if (ret < 0) return ret; - tunables->timer_rate = val; + + val_round = jiffies_to_usecs(usecs_to_jiffies(val)); + if (val != val_round) + pr_warn("timer_rate not aligned to jiffy. Rounded up to %lu\n", + val_round); + + tunables->timer_rate = val_round; return count; } |