sched: Final power vs. capacity cleanups
It is better not to think about compute capacity as being equivalent to "CPU power". The upcoming "power aware" scheduler work may create confusion with the notion of energy consumption if "power" is used too liberally. This contains the architecture visible changes. Incidentally, only ARM takes advantage of the available pow^H^H^Hcapacity scaling hooks and therefore those changes outside kernel/sched/ are confined to one ARM specific file. The default arch_scale_smt_power() hook is not overridden by anyone. Replacements are as follows: arch_scale_freq_power --> arch_scale_freq_capacity arch_scale_smt_power --> arch_scale_smt_capacity SCHED_POWER_SCALE --> SCHED_CAPACITY_SCALE SCHED_POWER_SHIFT --> SCHED_CAPACITY_SHIFT The local usage of "power" in arch/arm/kernel/topology.c is also changed to "capacity" as appropriate. Signed-off-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Vincent Guittot <vincent.guittot@linaro.org> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Morten Rasmussen <morten.rasmussen@arm.com> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: linaro-kernel@lists.linaro.org Cc: Arnd Bergmann <arnd@arndb.de> Cc: Dietmar Eggemann <dietmar.eggemann@arm.com> Cc: Grant Likely <grant.likely@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mark Brown <broonie@linaro.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com> Cc: Vincent Guittot <vincent.guittot@linaro.org> Cc: devicetree@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/n/tip-48zba9qbznvglwelgq2cfygh@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
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@ -26,30 +26,30 @@
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#include <asm/topology.h>
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#include <asm/topology.h>
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/*
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/*
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* cpu power scale management
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* cpu capacity scale management
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*/
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*/
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/*
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/*
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* cpu power table
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* cpu capacity table
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* This per cpu data structure describes the relative capacity of each core.
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* This per cpu data structure describes the relative capacity of each core.
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* On a heteregenous system, cores don't have the same computation capacity
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* On a heteregenous system, cores don't have the same computation capacity
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* and we reflect that difference in the cpu_power field so the scheduler can
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* and we reflect that difference in the cpu_capacity field so the scheduler
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* take this difference into account during load balance. A per cpu structure
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* can take this difference into account during load balance. A per cpu
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* is preferred because each CPU updates its own cpu_power field during the
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* structure is preferred because each CPU updates its own cpu_capacity field
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* load balance except for idle cores. One idle core is selected to run the
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* during the load balance except for idle cores. One idle core is selected
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* rebalance_domains for all idle cores and the cpu_power can be updated
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* to run the rebalance_domains for all idle cores and the cpu_capacity can be
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* during this sequence.
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* updated during this sequence.
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*/
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*/
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static DEFINE_PER_CPU(unsigned long, cpu_scale);
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static DEFINE_PER_CPU(unsigned long, cpu_scale);
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unsigned long arch_scale_freq_power(struct sched_domain *sd, int cpu)
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unsigned long arch_scale_freq_capacity(struct sched_domain *sd, int cpu)
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{
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{
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return per_cpu(cpu_scale, cpu);
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return per_cpu(cpu_scale, cpu);
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}
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}
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static void set_power_scale(unsigned int cpu, unsigned long power)
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static void set_capacity_scale(unsigned int cpu, unsigned long capacity)
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{
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{
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per_cpu(cpu_scale, cpu) = power;
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per_cpu(cpu_scale, cpu) = capacity;
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}
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}
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#ifdef CONFIG_OF
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#ifdef CONFIG_OF
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@ -62,11 +62,11 @@ struct cpu_efficiency {
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* Table of relative efficiency of each processors
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* Table of relative efficiency of each processors
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* The efficiency value must fit in 20bit and the final
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* The efficiency value must fit in 20bit and the final
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* cpu_scale value must be in the range
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* cpu_scale value must be in the range
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* 0 < cpu_scale < 3*SCHED_POWER_SCALE/2
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* 0 < cpu_scale < 3*SCHED_CAPACITY_SCALE/2
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* in order to return at most 1 when DIV_ROUND_CLOSEST
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* in order to return at most 1 when DIV_ROUND_CLOSEST
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* is used to compute the capacity of a CPU.
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* is used to compute the capacity of a CPU.
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* Processors that are not defined in the table,
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* Processors that are not defined in the table,
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* use the default SCHED_POWER_SCALE value for cpu_scale.
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* use the default SCHED_CAPACITY_SCALE value for cpu_scale.
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*/
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*/
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static const struct cpu_efficiency table_efficiency[] = {
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static const struct cpu_efficiency table_efficiency[] = {
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{"arm,cortex-a15", 3891},
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{"arm,cortex-a15", 3891},
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@ -83,9 +83,9 @@ static unsigned long middle_capacity = 1;
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* Iterate all CPUs' descriptor in DT and compute the efficiency
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* Iterate all CPUs' descriptor in DT and compute the efficiency
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* (as per table_efficiency). Also calculate a middle efficiency
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* (as per table_efficiency). Also calculate a middle efficiency
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* as close as possible to (max{eff_i} - min{eff_i}) / 2
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* as close as possible to (max{eff_i} - min{eff_i}) / 2
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* This is later used to scale the cpu_power field such that an
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* This is later used to scale the cpu_capacity field such that an
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* 'average' CPU is of middle power. Also see the comments near
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* 'average' CPU is of middle capacity. Also see the comments near
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* table_efficiency[] and update_cpu_power().
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* table_efficiency[] and update_cpu_capacity().
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*/
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*/
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static void __init parse_dt_topology(void)
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static void __init parse_dt_topology(void)
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{
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{
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@ -141,15 +141,15 @@ static void __init parse_dt_topology(void)
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* cpu_scale because all CPUs have the same capacity. Otherwise, we
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* cpu_scale because all CPUs have the same capacity. Otherwise, we
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* compute a middle_capacity factor that will ensure that the capacity
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* compute a middle_capacity factor that will ensure that the capacity
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* of an 'average' CPU of the system will be as close as possible to
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* of an 'average' CPU of the system will be as close as possible to
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* SCHED_POWER_SCALE, which is the default value, but with the
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* SCHED_CAPACITY_SCALE, which is the default value, but with the
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* constraint explained near table_efficiency[].
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* constraint explained near table_efficiency[].
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*/
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*/
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if (4*max_capacity < (3*(max_capacity + min_capacity)))
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if (4*max_capacity < (3*(max_capacity + min_capacity)))
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middle_capacity = (min_capacity + max_capacity)
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middle_capacity = (min_capacity + max_capacity)
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>> (SCHED_POWER_SHIFT+1);
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>> (SCHED_CAPACITY_SHIFT+1);
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else
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else
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middle_capacity = ((max_capacity / 3)
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middle_capacity = ((max_capacity / 3)
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>> (SCHED_POWER_SHIFT-1)) + 1;
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>> (SCHED_CAPACITY_SHIFT-1)) + 1;
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}
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}
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@ -158,20 +158,20 @@ static void __init parse_dt_topology(void)
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* boot. The update of all CPUs is in O(n^2) for heteregeneous system but the
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* boot. The update of all CPUs is in O(n^2) for heteregeneous system but the
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* function returns directly for SMP system.
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* function returns directly for SMP system.
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*/
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*/
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static void update_cpu_power(unsigned int cpu)
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static void update_cpu_capacity(unsigned int cpu)
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{
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{
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if (!cpu_capacity(cpu))
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if (!cpu_capacity(cpu))
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return;
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return;
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set_power_scale(cpu, cpu_capacity(cpu) / middle_capacity);
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set_capacity_scale(cpu, cpu_capacity(cpu) / middle_capacity);
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printk(KERN_INFO "CPU%u: update cpu_power %lu\n",
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printk(KERN_INFO "CPU%u: update cpu_capacity %lu\n",
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cpu, arch_scale_freq_power(NULL, cpu));
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cpu, arch_scale_freq_capacity(NULL, cpu));
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}
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}
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#else
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#else
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static inline void parse_dt_topology(void) {}
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static inline void parse_dt_topology(void) {}
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static inline void update_cpu_power(unsigned int cpuid) {}
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static inline void update_cpu_capacity(unsigned int cpuid) {}
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#endif
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#endif
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/*
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/*
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@ -267,7 +267,7 @@ void store_cpu_topology(unsigned int cpuid)
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update_siblings_masks(cpuid);
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update_siblings_masks(cpuid);
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update_cpu_power(cpuid);
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update_cpu_capacity(cpuid);
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printk(KERN_INFO "CPU%u: thread %d, cpu %d, socket %d, mpidr %x\n",
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printk(KERN_INFO "CPU%u: thread %d, cpu %d, socket %d, mpidr %x\n",
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cpuid, cpu_topology[cpuid].thread_id,
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cpuid, cpu_topology[cpuid].thread_id,
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{
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{
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unsigned int cpu;
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unsigned int cpu;
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/* init core mask and power*/
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/* init core mask and capacity */
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for_each_possible_cpu(cpu) {
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for_each_possible_cpu(cpu) {
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struct cputopo_arm *cpu_topo = &(cpu_topology[cpu]);
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struct cputopo_arm *cpu_topo = &(cpu_topology[cpu]);
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@ -307,7 +307,7 @@ void __init init_cpu_topology(void)
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cpumask_clear(&cpu_topo->core_sibling);
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cpumask_clear(&cpu_topo->core_sibling);
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cpumask_clear(&cpu_topo->thread_sibling);
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cpumask_clear(&cpu_topo->thread_sibling);
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set_power_scale(cpu, SCHED_POWER_SCALE);
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set_capacity_scale(cpu, SCHED_CAPACITY_SCALE);
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}
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}
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smp_wmb();
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smp_wmb();
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};
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};
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/*
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/*
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* Increase resolution of cpu_power calculations
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* Increase resolution of cpu_capacity calculations
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*/
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*/
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#define SCHED_POWER_SHIFT 10
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#define SCHED_CAPACITY_SHIFT 10
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#define SCHED_POWER_SCALE (1L << SCHED_POWER_SHIFT)
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#define SCHED_CAPACITY_SCALE (1L << SCHED_CAPACITY_SHIFT)
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/*
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/*
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* sched-domains (multiprocessor balancing) declarations:
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* sched-domains (multiprocessor balancing) declarations:
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cpulist_scnprintf(str, sizeof(str), sched_group_cpus(group));
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cpulist_scnprintf(str, sizeof(str), sched_group_cpus(group));
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printk(KERN_CONT " %s", str);
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printk(KERN_CONT " %s", str);
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if (group->sgc->capacity != SCHED_POWER_SCALE) {
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if (group->sgc->capacity != SCHED_CAPACITY_SCALE) {
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printk(KERN_CONT " (cpu_capacity = %d)",
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printk(KERN_CONT " (cpu_capacity = %d)",
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group->sgc->capacity);
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group->sgc->capacity);
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}
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}
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* domains and no possible iteration will get us here, we won't
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* domains and no possible iteration will get us here, we won't
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* die on a /0 trap.
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* die on a /0 trap.
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*/
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*/
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sg->sgc->capacity = SCHED_POWER_SCALE * cpumask_weight(sg_span);
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sg->sgc->capacity = SCHED_CAPACITY_SCALE * cpumask_weight(sg_span);
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sg->sgc->capacity_orig = sg->sgc->capacity;
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sg->sgc->capacity_orig = sg->sgc->capacity;
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/*
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/*
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#ifdef CONFIG_SMP
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#ifdef CONFIG_SMP
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rq->sd = NULL;
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rq->sd = NULL;
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rq->rd = NULL;
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rq->rd = NULL;
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rq->cpu_capacity = SCHED_POWER_SCALE;
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rq->cpu_capacity = SCHED_CAPACITY_SCALE;
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rq->post_schedule = 0;
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rq->post_schedule = 0;
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rq->active_balance = 0;
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rq->active_balance = 0;
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rq->next_balance = jiffies;
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rq->next_balance = jiffies;
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if (!cpus)
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if (!cpus)
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return;
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return;
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ns->load = (ns->load * SCHED_POWER_SCALE) / ns->compute_capacity;
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ns->load = (ns->load * SCHED_CAPACITY_SCALE) / ns->compute_capacity;
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ns->task_capacity =
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ns->task_capacity =
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DIV_ROUND_CLOSEST(ns->compute_capacity, SCHED_POWER_SCALE);
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DIV_ROUND_CLOSEST(ns->compute_capacity, SCHED_CAPACITY_SCALE);
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ns->has_free_capacity = (ns->nr_running < ns->task_capacity);
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ns->has_free_capacity = (ns->nr_running < ns->task_capacity);
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}
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}
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}
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}
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/* Adjust by relative CPU capacity of the group */
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/* Adjust by relative CPU capacity of the group */
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avg_load = (avg_load * SCHED_POWER_SCALE) / group->sgc->capacity;
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avg_load = (avg_load * SCHED_CAPACITY_SCALE) / group->sgc->capacity;
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if (local_group) {
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if (local_group) {
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this_load = avg_load;
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this_load = avg_load;
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static unsigned long default_scale_capacity(struct sched_domain *sd, int cpu)
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static unsigned long default_scale_capacity(struct sched_domain *sd, int cpu)
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{
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{
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return SCHED_POWER_SCALE;
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return SCHED_CAPACITY_SCALE;
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}
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}
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unsigned long __weak arch_scale_freq_power(struct sched_domain *sd, int cpu)
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unsigned long __weak arch_scale_freq_capacity(struct sched_domain *sd, int cpu)
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{
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{
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return default_scale_capacity(sd, cpu);
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return default_scale_capacity(sd, cpu);
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}
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}
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return smt_gain;
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return smt_gain;
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}
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}
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unsigned long __weak arch_scale_smt_power(struct sched_domain *sd, int cpu)
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unsigned long __weak arch_scale_smt_capacity(struct sched_domain *sd, int cpu)
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{
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{
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return default_scale_smt_capacity(sd, cpu);
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return default_scale_smt_capacity(sd, cpu);
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}
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}
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@ -5658,10 +5658,10 @@ static unsigned long scale_rt_capacity(int cpu)
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available = total - avg;
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available = total - avg;
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}
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}
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if (unlikely((s64)total < SCHED_POWER_SCALE))
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if (unlikely((s64)total < SCHED_CAPACITY_SCALE))
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total = SCHED_POWER_SCALE;
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total = SCHED_CAPACITY_SCALE;
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total >>= SCHED_POWER_SHIFT;
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total >>= SCHED_CAPACITY_SHIFT;
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return div_u64(available, total);
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return div_u64(available, total);
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}
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}
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static void update_cpu_capacity(struct sched_domain *sd, int cpu)
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static void update_cpu_capacity(struct sched_domain *sd, int cpu)
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{
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{
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unsigned long weight = sd->span_weight;
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unsigned long weight = sd->span_weight;
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unsigned long capacity = SCHED_POWER_SCALE;
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unsigned long capacity = SCHED_CAPACITY_SCALE;
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struct sched_group *sdg = sd->groups;
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struct sched_group *sdg = sd->groups;
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if ((sd->flags & SD_SHARE_CPUPOWER) && weight > 1) {
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if ((sd->flags & SD_SHARE_CPUPOWER) && weight > 1) {
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if (sched_feat(ARCH_POWER))
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if (sched_feat(ARCH_POWER))
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capacity *= arch_scale_smt_power(sd, cpu);
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capacity *= arch_scale_smt_capacity(sd, cpu);
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else
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else
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capacity *= default_scale_smt_capacity(sd, cpu);
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capacity *= default_scale_smt_capacity(sd, cpu);
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capacity >>= SCHED_POWER_SHIFT;
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capacity >>= SCHED_CAPACITY_SHIFT;
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}
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}
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sdg->sgc->capacity_orig = capacity;
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sdg->sgc->capacity_orig = capacity;
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if (sched_feat(ARCH_POWER))
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if (sched_feat(ARCH_POWER))
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capacity *= arch_scale_freq_power(sd, cpu);
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capacity *= arch_scale_freq_capacity(sd, cpu);
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else
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else
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capacity *= default_scale_capacity(sd, cpu);
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capacity *= default_scale_capacity(sd, cpu);
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capacity >>= SCHED_POWER_SHIFT;
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capacity >>= SCHED_CAPACITY_SHIFT;
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capacity *= scale_rt_capacity(cpu);
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capacity *= scale_rt_capacity(cpu);
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capacity >>= SCHED_POWER_SHIFT;
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capacity >>= SCHED_CAPACITY_SHIFT;
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if (!capacity)
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if (!capacity)
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capacity = 1;
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capacity = 1;
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@ -5780,7 +5780,7 @@ static inline int
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fix_small_capacity(struct sched_domain *sd, struct sched_group *group)
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fix_small_capacity(struct sched_domain *sd, struct sched_group *group)
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{
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{
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/*
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/*
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* Only siblings can have significantly less than SCHED_POWER_SCALE
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* Only siblings can have significantly less than SCHED_CAPACITY_SCALE
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*/
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*/
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if (!(sd->flags & SD_SHARE_CPUPOWER))
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if (!(sd->flags & SD_SHARE_CPUPOWER))
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return 0;
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return 0;
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@ -5845,11 +5845,11 @@ static inline int sg_capacity_factor(struct lb_env *env, struct sched_group *gro
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cpus = group->group_weight;
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cpus = group->group_weight;
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/* smt := ceil(cpus / capacity), assumes: 1 < smt_capacity < 2 */
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/* smt := ceil(cpus / capacity), assumes: 1 < smt_capacity < 2 */
|
||||||
smt = DIV_ROUND_UP(SCHED_POWER_SCALE * cpus, capacity_orig);
|
smt = DIV_ROUND_UP(SCHED_CAPACITY_SCALE * cpus, capacity_orig);
|
||||||
capacity_factor = cpus / smt; /* cores */
|
capacity_factor = cpus / smt; /* cores */
|
||||||
|
|
||||||
capacity_factor = min_t(unsigned,
|
capacity_factor = min_t(unsigned,
|
||||||
capacity_factor, DIV_ROUND_CLOSEST(capacity, SCHED_POWER_SCALE));
|
capacity_factor, DIV_ROUND_CLOSEST(capacity, SCHED_CAPACITY_SCALE));
|
||||||
if (!capacity_factor)
|
if (!capacity_factor)
|
||||||
capacity_factor = fix_small_capacity(env->sd, group);
|
capacity_factor = fix_small_capacity(env->sd, group);
|
||||||
|
|
||||||
|
@ -5895,7 +5895,7 @@ static inline void update_sg_lb_stats(struct lb_env *env,
|
||||||
|
|
||||||
/* Adjust by relative CPU capacity of the group */
|
/* Adjust by relative CPU capacity of the group */
|
||||||
sgs->group_capacity = group->sgc->capacity;
|
sgs->group_capacity = group->sgc->capacity;
|
||||||
sgs->avg_load = (sgs->group_load*SCHED_POWER_SCALE) / sgs->group_capacity;
|
sgs->avg_load = (sgs->group_load*SCHED_CAPACITY_SCALE) / sgs->group_capacity;
|
||||||
|
|
||||||
if (sgs->sum_nr_running)
|
if (sgs->sum_nr_running)
|
||||||
sgs->load_per_task = sgs->sum_weighted_load / sgs->sum_nr_running;
|
sgs->load_per_task = sgs->sum_weighted_load / sgs->sum_nr_running;
|
||||||
|
@ -6089,7 +6089,7 @@ static int check_asym_packing(struct lb_env *env, struct sd_lb_stats *sds)
|
||||||
|
|
||||||
env->imbalance = DIV_ROUND_CLOSEST(
|
env->imbalance = DIV_ROUND_CLOSEST(
|
||||||
sds->busiest_stat.avg_load * sds->busiest_stat.group_capacity,
|
sds->busiest_stat.avg_load * sds->busiest_stat.group_capacity,
|
||||||
SCHED_POWER_SCALE);
|
SCHED_CAPACITY_SCALE);
|
||||||
|
|
||||||
return 1;
|
return 1;
|
||||||
}
|
}
|
||||||
|
@ -6118,7 +6118,7 @@ void fix_small_imbalance(struct lb_env *env, struct sd_lb_stats *sds)
|
||||||
imbn = 1;
|
imbn = 1;
|
||||||
|
|
||||||
scaled_busy_load_per_task =
|
scaled_busy_load_per_task =
|
||||||
(busiest->load_per_task * SCHED_POWER_SCALE) /
|
(busiest->load_per_task * SCHED_CAPACITY_SCALE) /
|
||||||
busiest->group_capacity;
|
busiest->group_capacity;
|
||||||
|
|
||||||
if (busiest->avg_load + scaled_busy_load_per_task >=
|
if (busiest->avg_load + scaled_busy_load_per_task >=
|
||||||
|
@ -6137,7 +6137,7 @@ void fix_small_imbalance(struct lb_env *env, struct sd_lb_stats *sds)
|
||||||
min(busiest->load_per_task, busiest->avg_load);
|
min(busiest->load_per_task, busiest->avg_load);
|
||||||
capa_now += local->group_capacity *
|
capa_now += local->group_capacity *
|
||||||
min(local->load_per_task, local->avg_load);
|
min(local->load_per_task, local->avg_load);
|
||||||
capa_now /= SCHED_POWER_SCALE;
|
capa_now /= SCHED_CAPACITY_SCALE;
|
||||||
|
|
||||||
/* Amount of load we'd subtract */
|
/* Amount of load we'd subtract */
|
||||||
if (busiest->avg_load > scaled_busy_load_per_task) {
|
if (busiest->avg_load > scaled_busy_load_per_task) {
|
||||||
|
@ -6148,16 +6148,16 @@ void fix_small_imbalance(struct lb_env *env, struct sd_lb_stats *sds)
|
||||||
|
|
||||||
/* Amount of load we'd add */
|
/* Amount of load we'd add */
|
||||||
if (busiest->avg_load * busiest->group_capacity <
|
if (busiest->avg_load * busiest->group_capacity <
|
||||||
busiest->load_per_task * SCHED_POWER_SCALE) {
|
busiest->load_per_task * SCHED_CAPACITY_SCALE) {
|
||||||
tmp = (busiest->avg_load * busiest->group_capacity) /
|
tmp = (busiest->avg_load * busiest->group_capacity) /
|
||||||
local->group_capacity;
|
local->group_capacity;
|
||||||
} else {
|
} else {
|
||||||
tmp = (busiest->load_per_task * SCHED_POWER_SCALE) /
|
tmp = (busiest->load_per_task * SCHED_CAPACITY_SCALE) /
|
||||||
local->group_capacity;
|
local->group_capacity;
|
||||||
}
|
}
|
||||||
capa_move += local->group_capacity *
|
capa_move += local->group_capacity *
|
||||||
min(local->load_per_task, local->avg_load + tmp);
|
min(local->load_per_task, local->avg_load + tmp);
|
||||||
capa_move /= SCHED_POWER_SCALE;
|
capa_move /= SCHED_CAPACITY_SCALE;
|
||||||
|
|
||||||
/* Move if we gain throughput */
|
/* Move if we gain throughput */
|
||||||
if (capa_move > capa_now)
|
if (capa_move > capa_now)
|
||||||
|
@ -6207,7 +6207,7 @@ static inline void calculate_imbalance(struct lb_env *env, struct sd_lb_stats *s
|
||||||
load_above_capacity =
|
load_above_capacity =
|
||||||
(busiest->sum_nr_running - busiest->group_capacity_factor);
|
(busiest->sum_nr_running - busiest->group_capacity_factor);
|
||||||
|
|
||||||
load_above_capacity *= (SCHED_LOAD_SCALE * SCHED_POWER_SCALE);
|
load_above_capacity *= (SCHED_LOAD_SCALE * SCHED_CAPACITY_SCALE);
|
||||||
load_above_capacity /= busiest->group_capacity;
|
load_above_capacity /= busiest->group_capacity;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -6225,7 +6225,7 @@ static inline void calculate_imbalance(struct lb_env *env, struct sd_lb_stats *s
|
||||||
env->imbalance = min(
|
env->imbalance = min(
|
||||||
max_pull * busiest->group_capacity,
|
max_pull * busiest->group_capacity,
|
||||||
(sds->avg_load - local->avg_load) * local->group_capacity
|
(sds->avg_load - local->avg_load) * local->group_capacity
|
||||||
) / SCHED_POWER_SCALE;
|
) / SCHED_CAPACITY_SCALE;
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* if *imbalance is less than the average load per runnable task
|
* if *imbalance is less than the average load per runnable task
|
||||||
|
@ -6279,7 +6279,8 @@ static struct sched_group *find_busiest_group(struct lb_env *env)
|
||||||
if (!sds.busiest || busiest->sum_nr_running == 0)
|
if (!sds.busiest || busiest->sum_nr_running == 0)
|
||||||
goto out_balanced;
|
goto out_balanced;
|
||||||
|
|
||||||
sds.avg_load = (SCHED_POWER_SCALE * sds.total_load) / sds.total_capacity;
|
sds.avg_load = (SCHED_CAPACITY_SCALE * sds.total_load)
|
||||||
|
/ sds.total_capacity;
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* If the busiest group is imbalanced the below checks don't
|
* If the busiest group is imbalanced the below checks don't
|
||||||
|
@ -6378,7 +6379,7 @@ static struct rq *find_busiest_queue(struct lb_env *env,
|
||||||
continue;
|
continue;
|
||||||
|
|
||||||
capacity = capacity_of(i);
|
capacity = capacity_of(i);
|
||||||
capacity_factor = DIV_ROUND_CLOSEST(capacity, SCHED_POWER_SCALE);
|
capacity_factor = DIV_ROUND_CLOSEST(capacity, SCHED_CAPACITY_SCALE);
|
||||||
if (!capacity_factor)
|
if (!capacity_factor)
|
||||||
capacity_factor = fix_small_capacity(env->sd, group);
|
capacity_factor = fix_small_capacity(env->sd, group);
|
||||||
|
|
||||||
|
|
Loading…
Reference in New Issue