diff options
| author | Todd Poynor <toddpoynor@google.com> | 2012-10-03 00:39:56 -0700 |
|---|---|---|
| committer | Nitin Garg <nitin.garg@freescale.com> | 2014-04-21 22:35:02 -0500 |
| commit | ebce520aa704b7d8030f06e50b7bfbee1a36dc05 (patch) | |
| tree | 69694787efc4802acf0080906271dd93cdde4171 /drivers/cpufreq | |
| parent | 1a5bb46b96ed38cdf07d0191077823e67a8da5bd (diff) | |
cpufreq: interactive: run at fraction of hispeed_freq when load is low
When load is below go_hispeed_load, apply the percentage of CPU load to
a max frequency of hispeed_freq instead of the max speed. This avoids
jumping too quickly to hispeed_freq when it is a relatively low
percentage of max speed. This also allows go_hispeed_load to be set to
a high percentage relative to hispeed_freq (as a percentage of max speed,
again useful when hispeed_freq is a low fraction of max speed), to cap
larger loads at hispeed_freq. For example, a load of 60% will typically
move to 60% of hispeed_freq, not 60% of max speed. This causes the
governor to apply two different speed caps, depending on whether load is
below or above go_hispeed_load.
Also fix the type of hispeed_freq, which was u64, to match other
speed data types (and avoid overhead and allow division).
Change-Id: Ie2d0668be161c074aaad77db2037505431457b3a
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Diffstat (limited to 'drivers/cpufreq')
| -rw-r--r-- | drivers/cpufreq/cpufreq_interactive.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/cpufreq/cpufreq_interactive.c b/drivers/cpufreq/cpufreq_interactive.c index f85fbbd6cb7b..16bd23be2495 100644 --- a/drivers/cpufreq/cpufreq_interactive.c +++ b/drivers/cpufreq/cpufreq_interactive.c @@ -63,7 +63,7 @@ static cpumask_t speedchange_cpumask; static spinlock_t speedchange_cpumask_lock; /* Hi speed to bump to from lo speed when load burst (default max) */ -static u64 hispeed_freq; +static unsigned int hispeed_freq; /* Go to hi speed when CPU load at or above this value. */ #define DEFAULT_GO_HISPEED_LOAD 85 @@ -198,7 +198,7 @@ static void cpufreq_interactive_timer(unsigned long data) } } } else { - new_freq = pcpu->policy->max * cpu_load / 100; + new_freq = hispeed_freq * cpu_load / 100; } if (new_freq <= hispeed_freq) @@ -465,7 +465,7 @@ static void cpufreq_interactive_boost(void) static ssize_t show_hispeed_freq(struct kobject *kobj, struct attribute *attr, char *buf) { - return sprintf(buf, "%llu\n", hispeed_freq); + return sprintf(buf, "%u\n", hispeed_freq); } static ssize_t store_hispeed_freq(struct kobject *kobj, @@ -473,9 +473,9 @@ static ssize_t store_hispeed_freq(struct kobject *kobj, size_t count) { int ret; - u64 val; + long unsigned int val; - ret = strict_strtoull(buf, 0, &val); + ret = strict_strtoul(buf, 0, &val); if (ret < 0) return ret; hispeed_freq = val; |