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| author | Tim Chen <tim.c.chen@linux.intel.com> | 2016-11-22 12:23:53 -0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2016-11-24 14:09:46 +0100 |
| commit | afe06efdf07c12fd9370d5cce5383398cedf6c90 (patch) | |
| tree | 3219592dcafbd67be8cbb5b97315f2f25fb5c617 /kernel/sched/sched.h | |
| parent | 2b4d5b2582deffb77b3b4b48a59cd36e9e1e14d9 (diff) | |
| download | linux-afe06efdf07c12fd9370d5cce5383398cedf6c90.tar.gz linux-afe06efdf07c12fd9370d5cce5383398cedf6c90.tar.bz2 linux-afe06efdf07c12fd9370d5cce5383398cedf6c90.zip | |
sched: Extend scheduler's asym packing
We generalize the scheduler's asym packing to provide an ordering
of the cpu beyond just the cpu number. This allows the use of the
ASYM_PACKING scheduler machinery to move loads to preferred CPU in a
sched domain. The preference is defined with the cpu priority
given by arch_asym_cpu_priority(cpu).
We also record the most preferred cpu in a sched group when
we build the cpu's capacity for fast lookup of preferred cpu
during load balancing.
Co-developed-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: linux-pm@vger.kernel.org
Cc: jolsa@redhat.com
Cc: rjw@rjwysocki.net
Cc: linux-acpi@vger.kernel.org
Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: bp@suse.de
Link: http://lkml.kernel.org/r/0e73ae12737dfaafa46c07066cc7c5d3f1675e46.1479844244.git.tim.c.chen@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/sched/sched.h')
| -rw-r--r-- | kernel/sched/sched.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index d7e39317d688..7b34c7826ca5 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -540,6 +540,11 @@ struct dl_rq { #ifdef CONFIG_SMP +static inline bool sched_asym_prefer(int a, int b) +{ + return arch_asym_cpu_priority(a) > arch_asym_cpu_priority(b); +} + /* * We add the notion of a root-domain which will be used to define per-domain * variables. Each exclusive cpuset essentially defines an island domain by @@ -908,6 +913,7 @@ struct sched_group { unsigned int group_weight; struct sched_group_capacity *sgc; + int asym_prefer_cpu; /* cpu of highest priority in group */ /* * The CPUs this group covers. |