Currently MIN_LATENCY_MULTIPLIER is set defined as 100 and so on a system with transition latency of 1 ms, the minimum sampling time comes to be around 100 ms. That is quite big if you want to get better performance for your system.
Redefine MIN_LATENCY_MULTIPLIER to 20 so that we can support 20ms sampling rate for such platforms.
Signed-off-by: Viresh Kumar viresh.kumar@linaro.org ---
Hi Guys,
I really don't know how this figure (100) came initially, but we really need to have 20ms support for my platform: ARM TC2.
Pushed here:
http://git.linaro.org/gitweb?p=people/vireshk/linux.git%3Ba=shortlog%3Bh=ref...
drivers/cpufreq/cpufreq_governor.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/cpufreq/cpufreq_governor.h b/drivers/cpufreq/cpufreq_governor.h index d2ac911..adb8e30 100644 --- a/drivers/cpufreq/cpufreq_governor.h +++ b/drivers/cpufreq/cpufreq_governor.h @@ -34,7 +34,7 @@ */ #define MIN_SAMPLING_RATE_RATIO (2) #define LATENCY_MULTIPLIER (1000) -#define MIN_LATENCY_MULTIPLIER (100) +#define MIN_LATENCY_MULTIPLIER (20) #define TRANSITION_LATENCY_LIMIT (10 * 1000 * 1000)
/* Ondemand Sampling types */