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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-02-10 16:53:50 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-03-09 14:40:53 +0100 |
| commit | 9be4fd2c7723a3057b0b39676fe4c8d5fd7118a4 (patch) | |
| tree | 22a2bc3fe8bcaba486f16739788d5e1bf3bcfdb7 /drivers/cpufreq/Kconfig | |
| parent | a4675fbc4a7abe072ac6ba38c252f22a91ebcd94 (diff) | |
cpufreq: governor: Replace timers with utilization update callbacks
Instead of using a per-CPU deferrable timer for queuing up governor
work items, register a utilization update callback that will be
invoked from the scheduler on utilization changes.
The sampling rate is still the same as what was used for the
deferrable timers and the added irq_work overhead should be offset by
the eliminated timers overhead, so in theory the functional impact of
this patch should not be significant.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Tested-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Diffstat (limited to 'drivers/cpufreq/Kconfig')
| -rw-r--r-- | drivers/cpufreq/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig index 659879a56dba..dcb972a38fbc 100644 --- a/drivers/cpufreq/Kconfig +++ b/drivers/cpufreq/Kconfig @@ -3,6 +3,7 @@ menu "CPU Frequency scaling" config CPU_FREQ bool "CPU Frequency scaling" select SRCU + select IRQ_WORK help CPU Frequency scaling allows you to change the clock speed of CPUs on the fly. This is a nice method to save power, because |