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It turns out that a few workloads (easyWave, fio) have a fairly low success rate on newidle balance, but still benefit greatly from having it anyway. Luckliky these workloads have a faily low newidle rate, so the cost if doing the newidle is relatively low, even if unsuccessfull. Add a simple rate based part to the newidle ratio compute, such that low rate newidle will still have a high newidle ratio. This cures the easyWave and fio workloads while not affecting the schbench numbers either (which have a very high newidle rate). Reported-by: Mario Roy <marioeroy@gmail.com> Reported-by: "Mohamed Abuelfotoh, Hazem" <abuehaze@amazon.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Mario Roy <marioeroy@gmail.com> Tested-by: "Mohamed Abuelfotoh, Hazem" <abuehaze@amazon.com> Link: https://patch.msgid.link/20260127151748.GA1079264@noisy.programming.kicks-ass.net |
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