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Subject[PATCH 8/15] sched: Add parameter sched_mn_power_savings to control MN domain sched policy

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
---
include/linux/sched.h | 4 +++-
kernel/sched.c | 38 ++++++++++++++++++++++++++++++++------
2 files changed, 35 insertions(+), 7 deletions(-)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 3a1f8db..5755643 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -832,7 +832,9 @@ enum powersavings_balance_level {
MAX_POWERSAVINGS_BALANCE_LEVELS
};

-extern int sched_mc_power_savings, sched_smt_power_savings;
+extern int sched_mn_power_savings;
+extern int sched_mc_power_savings;
+extern int sched_smt_power_savings;

static inline int sd_balance_for_mc_power(void)
{
diff --git a/kernel/sched.c b/kernel/sched.c
index 6cfc840..ebcda58 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -8179,7 +8179,9 @@ static void sched_domain_node_span(int node, struct cpumask *span)
}
#endif /* CONFIG_NUMA */

-int sched_smt_power_savings = 0, sched_mc_power_savings = 0;
+int sched_mn_power_savings = 0;
+int sched_mc_power_savings = 0;
+int sched_smt_power_savings = 0;

/*
* The cpus mask in sched_group and sched_domain hangs off the end.
@@ -9135,7 +9137,8 @@ static void arch_reinit_sched_domains(void)
put_online_cpus();
}

-static ssize_t sched_power_savings_store(const char *buf, size_t count, int smt)
+static ssize_t sched_power_savings_store(const char *buf, size_t count,
+ enum sched_domain_level dl)
{
unsigned int level = 0;

@@ -9152,16 +9155,34 @@ static ssize_t sched_power_savings_store(const char *buf, size_t count, int smt)
if (level >= MAX_POWERSAVINGS_BALANCE_LEVELS)
return -EINVAL;

- if (smt)
+ if (dl == SD_LV_SIBLING)
sched_smt_power_savings = level;
- else
+ else if (dl == SD_LV_MC)
sched_mc_power_savings = level;
+ else if (dl == SD_LV_MN)
+ sched_mn_power_savings = level;

arch_reinit_sched_domains();

return count;
}

+#ifdef CONFIG_SCHED_MN
+static ssize_t sched_mn_power_savings_show(struct sysdev_class *class,
+ char *page)
+{
+ return sprintf(page, "%u\n", sched_mn_power_savings);
+}
+static ssize_t sched_mn_power_savings_store(struct sysdev_class *class,
+ const char *buf, size_t count)
+{
+ return sched_power_savings_store(buf, count, SD_LV_MN);
+}
+static SYSDEV_CLASS_ATTR(sched_mn_power_savings, 0644,
+ sched_mn_power_savings_show,
+ sched_mn_power_savings_store);
+#endif
+
#ifdef CONFIG_SCHED_MC
static ssize_t sched_mc_power_savings_show(struct sysdev_class *class,
char *page)
@@ -9171,7 +9192,7 @@ static ssize_t sched_mc_power_savings_show(struct sysdev_class *class,
static ssize_t sched_mc_power_savings_store(struct sysdev_class *class,
const char *buf, size_t count)
{
- return sched_power_savings_store(buf, count, 0);
+ return sched_power_savings_store(buf, count, SD_LV_MC);
}
static SYSDEV_CLASS_ATTR(sched_mc_power_savings, 0644,
sched_mc_power_savings_show,
@@ -9187,7 +9208,7 @@ static ssize_t sched_smt_power_savings_show(struct sysdev_class *dev,
static ssize_t sched_smt_power_savings_store(struct sysdev_class *dev,
const char *buf, size_t count)
{
- return sched_power_savings_store(buf, count, 1);
+ return sched_power_savings_store(buf, count, SD_LV_SIBLING);
}
static SYSDEV_CLASS_ATTR(sched_smt_power_savings, 0644,
sched_smt_power_savings_show,
@@ -9208,6 +9229,11 @@ int __init sched_create_sysfs_power_savings_entries(struct sysdev_class *cls)
err = sysfs_create_file(&cls->kset.kobj,
&attr_sched_mc_power_savings.attr);
#endif
+#ifdef CONFIG_SCHED_MN
+ if (!err && mc_capable())
+ err = sysfs_create_file(&cls->kset.kobj,
+ &attr_sched_mn_power_savings.attr);
+#endif
return err;
}
#endif /* CONFIG_SCHED_MC || CONFIG_SCHED_SMT */
--
1.6.0.4




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