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cpuquiet: Adding runnable thread knobs

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Ported the knobs that select runnable thread profiles from autohotplug
into cpuquiet.

Change-Id: I6858731e238404d33c772767d066cd6d467267a8
Signed-off-by: Xiao Bo Zhao <xiaoboz@nvidia.com>
Reviewed-on: http://git-master/r/123852
Reviewed-by: Sai Gurrappadi <sgurrappadi@nvidia.com>
Tested-by: Sai Gurrappadi <sgurrappadi@nvidia.com>
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Diwakar Tundlam <dtundlam@nvidia.com>

Rebase-Id: R640f1619f85fbf52701b39f5649c950f0d2bf9a0
This commit is contained in:
Xiao Bo Zhao
2012-08-02 16:33:51 -07:00
committed by Huang, Tao
parent c35afbfcbe
commit a6b43f380d
1 changed files with 48 additions and 4 deletions
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52
drivers/cpuquiet/governors/balanced.c
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@@ -170,10 +170,37 @@ static unsigned int count_slow_cpus(unsigned int limit)
}
#define NR_FSHIFT 2
static unsigned int nr_run_thresholds[] = {
static unsigned int rt_profile_sel;
static unsigned int core_bias; //Dummy variable exposed to userspace
static unsigned int rt_profile_default[] = {
/* 1, 2, 3, 4 - on-line cpus target */
5, 9, 10, UINT_MAX /* avg run threads * 4 (e.g., 9 = 2.25 threads) */
5, 9, 10, UINT_MAX
};
static unsigned int rt_profile_1[] = {
/* 1, 2, 3, 4 - on-line cpus target */
8, 9, 10, UINT_MAX
};
static unsigned int rt_profile_2[] = {
/* 1, 2, 3, 4 - on-line cpus target */
5, 13, 14, UINT_MAX
};
static unsigned int rt_profile_disable[] = {
/* 1, 2, 3, 4 - on-line cpus target */
0, 0, 0, UINT_MAX
};
static unsigned int *rt_profiles[] = {
rt_profile_default,
rt_profile_1,
rt_profile_2,
rt_profile_disable
};
static unsigned int nr_run_hysteresis = 2; /* 0.5 thread */
static unsigned int nr_run_last;
@@ -186,12 +213,13 @@ static CPU_SPEED_BALANCE balanced_speed_balance(void)
unsigned int max_cpus = pm_qos_request(PM_QOS_MAX_ONLINE_CPUS) ? : 4;
unsigned int avg_nr_run = avg_nr_running();
unsigned int nr_run;
unsigned int *current_profile = rt_profiles[rt_profile_sel];
/* balanced: freq targets for all CPUs are above 50% of highest speed
biased: freq target for at least one CPU is below 50% threshold
skewed: freq targets for at least 2 CPUs are below 25% threshold */
for (nr_run = 1; nr_run < ARRAY_SIZE(nr_run_thresholds); nr_run++) {
unsigned int nr_threshold = nr_run_thresholds[nr_run - 1];
for (nr_run = 1; nr_run < ARRAY_SIZE(rt_profile_default); nr_run++) {
unsigned int nr_threshold = current_profile[nr_run - 1];
if (nr_run_last <= nr_run)
nr_threshold += nr_run_hysteresis;
if (avg_nr_run <= (nr_threshold << (FSHIFT - NR_FSHIFT)))
@@ -334,10 +362,25 @@ static void delay_callback(struct cpuquiet_attribute *attr)
}
}
static void core_bias_callback (struct cpuquiet_attribute *attr)
{
unsigned long val;
if (attr) {
val = (*((unsigned int*)(attr->param)));
if (val < ARRAY_SIZE(rt_profiles)) {
rt_profile_sel = val;
}
else { //Revert the change due to invalid range
core_bias = rt_profile_sel;
}
}
}
CPQ_BASIC_ATTRIBUTE(balance_level, 0644, uint);
CPQ_BASIC_ATTRIBUTE(idle_bottom_freq, 0644, uint);
CPQ_BASIC_ATTRIBUTE(idle_top_freq, 0644, uint);
CPQ_BASIC_ATTRIBUTE(load_sample_rate, 0644, uint);
CPQ_ATTRIBUTE(core_bias, 0644, uint, core_bias_callback);
CPQ_ATTRIBUTE(up_delay, 0644, ulong, delay_callback);
CPQ_ATTRIBUTE(down_delay, 0644, ulong, delay_callback);
@@ -348,6 +391,7 @@ static struct attribute *balanced_attributes[] = {
&up_delay_attr.attr,
&down_delay_attr.attr,
&load_sample_rate_attr.attr,
&core_bias_attr.attr,
NULL,
};