diff options
| author | Syed Rameez Mustafa <rameezmustafa@codeaurora.org> | 2017-01-04 15:56:51 -0800 |
|---|---|---|
| committer | Syed Rameez Mustafa <rameezmustafa@codeaurora.org> | 2017-01-10 11:01:52 -0800 |
| commit | 47f7e0415af9fd1078b51a45a7b18701eb7d5177 (patch) | |
| tree | 3cc1dc68321f14a7b2e520ec02bbacc9a6452383 /drivers/base | |
| parent | a6d83d2e8ed916c5a097c7c047dc39cb9183b0e9 (diff) | |
sched: Convert the global wake_up_idle flag to a per cluster flag
Since clusters can vary significantly in the power and performance
characteristics, there may be a need to have different CPU selection
policies based on which cluster a task is being placed on. For example
the placement policy can be more aggressive in using idle CPUs on
cluster that are power efficient and less aggressive on clusters
that are geared towards performance. Add support for per cluster
wake_up_idle flag to allow greater flexibility in placement policies.
Change-Id: I18cd3d907cd965db03a13f4655870dc10c07acfe
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/cpu.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c index c8bfb6077224..118a4f245ad1 100644 --- a/drivers/base/cpu.c +++ b/drivers/base/cpu.c @@ -306,16 +306,56 @@ static ssize_t __ref store_sched_static_cluster_pwr_cost(struct device *dev, return err; } +static ssize_t show_sched_cluser_wake_idle(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct cpu *cpu = container_of(dev, struct cpu, dev); + ssize_t rc; + int cpuid = cpu->dev.id; + unsigned int wake_up_idle; + + wake_up_idle = sched_get_cluster_wake_idle(cpuid); + + rc = scnprintf(buf, PAGE_SIZE-2, "%d\n", wake_up_idle); + + return rc; +} + +static ssize_t __ref store_sched_cluster_wake_idle(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct cpu *cpu = container_of(dev, struct cpu, dev); + int err; + int cpuid = cpu->dev.id; + unsigned int wake_up_idle; + + err = kstrtouint(strstrip((char *)buf), 0, &wake_up_idle); + if (err) + return err; + + err = sched_set_cluster_wake_idle(cpuid, wake_up_idle); + + if (err >= 0) + err = count; + + return err; +} + static DEVICE_ATTR(sched_static_cpu_pwr_cost, 0644, show_sched_static_cpu_pwr_cost, store_sched_static_cpu_pwr_cost); static DEVICE_ATTR(sched_static_cluster_pwr_cost, 0644, show_sched_static_cluster_pwr_cost, store_sched_static_cluster_pwr_cost); +static DEVICE_ATTR(sched_cluster_wake_up_idle, 0644, + show_sched_cluser_wake_idle, + store_sched_cluster_wake_idle); static struct attribute *hmp_sched_cpu_attrs[] = { &dev_attr_sched_static_cpu_pwr_cost.attr, &dev_attr_sched_static_cluster_pwr_cost.attr, + &dev_attr_sched_cluster_wake_up_idle.attr, NULL }; |