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| author | Joel Fernandes <joelaf@google.com> | 2017-12-21 04:22:45 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-01-02 22:31:05 +0300 |
| commit | 0c688c288f8e82fdb5f3e0d0f3b2b1f3498ad187 (patch) | |
| tree | cfb6dda7923c3f7fc61de8cc00f9b7303e66a1d5 /include | |
| parent | 9c5ee053a67eb374878b20eab7d16feb2a87a851 (diff) | |
| download | linux-0c688c288f8e82fdb5f3e0d0f3b2b1f3498ad187.tar.xz | |
cpufreq: schedutil: Use idle_calls counter of the remote CPU
commit 466a2b42d67644447a1765276259a3ea5531ddff upstream.
Since the recent remote cpufreq callback work, its possible that a cpufreq
update is triggered from a remote CPU. For single policies however, the current
code uses the local CPU when trying to determine if the remote sg_cpu entered
idle or is busy. This is incorrect. To remedy this, compare with the nohz tick
idle_calls counter of the remote CPU.
Fixes: 674e75411fc2 (sched: cpufreq: Allow remote cpufreq callbacks)
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Joel Fernandes <joelaf@google.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/tick.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/tick.h b/include/linux/tick.h index cf413b344ddb..5cdac11dd317 100644 --- a/include/linux/tick.h +++ b/include/linux/tick.h @@ -119,6 +119,7 @@ extern void tick_nohz_idle_exit(void); extern void tick_nohz_irq_exit(void); extern ktime_t tick_nohz_get_sleep_length(void); extern unsigned long tick_nohz_get_idle_calls(void); +extern unsigned long tick_nohz_get_idle_calls_cpu(int cpu); extern u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time); extern u64 get_cpu_iowait_time_us(int cpu, u64 *last_update_time); #else /* !CONFIG_NO_HZ_COMMON */ |