sched/numa: Remove unused task_capacity from 'struct numa_stats'
The task_capacity field in 'struct numa_stats' is redundant. Also move nr_running for better packing within the struct. No functional changes. Running SPECjbb2005 on a 4 node machine and comparing bops/JVM JVMS LAST_PATCH WITH_PATCH %CHANGE 16 25308.6 25377.3 0.271 1 72964 72287 -0.92 Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Mel Gorman <mgorman@techsingularity.net> Acked-by: Rik van Riel <riel@surriel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1529514181-9842-9-git-send-email-srikar@linux.vnet.ibm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
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@ -1450,14 +1450,12 @@ static unsigned long capacity_of(int cpu);
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/* Cached statistics for all CPUs within a node */
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/* Cached statistics for all CPUs within a node */
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struct numa_stats {
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struct numa_stats {
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unsigned long nr_running;
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unsigned long load;
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unsigned long load;
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/* Total compute capacity of CPUs on a node */
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/* Total compute capacity of CPUs on a node */
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unsigned long compute_capacity;
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unsigned long compute_capacity;
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/* Approximate capacity in terms of runnable tasks on a node */
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unsigned int nr_running;
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unsigned long task_capacity;
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int has_free_capacity;
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int has_free_capacity;
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};
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};
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@ -1495,9 +1493,9 @@ static void update_numa_stats(struct numa_stats *ns, int nid)
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smt = DIV_ROUND_UP(SCHED_CAPACITY_SCALE * cpus, ns->compute_capacity);
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smt = DIV_ROUND_UP(SCHED_CAPACITY_SCALE * cpus, ns->compute_capacity);
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capacity = cpus / smt; /* cores */
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capacity = cpus / smt; /* cores */
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ns->task_capacity = min_t(unsigned, capacity,
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capacity = min_t(unsigned, capacity,
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DIV_ROUND_CLOSEST(ns->compute_capacity, SCHED_CAPACITY_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 < capacity);
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}
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}
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struct task_numa_env {
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struct task_numa_env {
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