02.11.2019 00:58, Michał Mirosław пишет: > On Wed, Oct 30, 2019 at 01:00:17AM +0300, Dmitry Osipenko wrote: >> The ACTMON governor is interrupt-driven and currently hardware's polling >> interval is fixed to 16ms in the driver. Devfreq supports variable polling >> interval by the generic governors, let's re-use the generic interface for >> changing of the polling interval. Now the polling interval can be changed >> dynamically via /sys/class/devfreq/devfreq0/polling_interval. > [...] >> @@ -308,7 +308,7 @@ static unsigned long actmon_device_target_freq(struct tegra_devfreq *tegra, >> unsigned int avg_sustain_coef; >> unsigned long target_freq; >> >> - target_freq = dev->avg_count / ACTMON_SAMPLING_PERIOD; >> + target_freq = dev->avg_count / tegra->devfreq->profile->polling_ms; >> avg_sustain_coef = 100 * 100 / dev->config->boost_up_threshold; >> target_freq = do_percent(target_freq, avg_sustain_coef); >> target_freq += dev->boost_freq; > > Noting a comment in patch 13, if this is hot path you could try reciprocal_divide(). Hello Michał, This not really a hot path, I just wanted to optimize that case to keep things a bit nicer. Please take a look at the arch/arm/boot/compressed/lib1funcs.S, firstly it checks whether divisor is a power of 2 value and then takes optimized code path that uses a single shift. Hence the patch 13 still applies here.
