Thread (66 messages) 66 messages, 8 authors, 2014-07-18

[PATCH v3 08/12] sched: move cfs task on a CPU with higher capacity

From: peterz@infradead.org (Peter Zijlstra)
Date: 2014-07-10 11:18:41
Also in: lkml

On Mon, Jun 30, 2014 at 06:05:39PM +0200, Vincent Guittot wrote:
+		/*
+		 * If the CPUs share their cache and the src_cpu's capacity is
+		 * reduced because of other sched_class or IRQs, we trig an
+		 * active balance to move the task
+		 */
+		if ((sd->flags & SD_SHARE_PKG_RESOURCES)
+		 && ((capacity_orig_of(src_cpu) * 100) > (capacity_of(src_cpu) *
+							sd->imbalance_pct)))
 			return 1;
Why is this tied to shared caches?
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