Re: [PATCH v4 4/4] powerpc/64s: enable MMU_LAZY_TLB_SHOOTDOWN
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From: Andrew Morton <akpm@linux-foundation.org>
Date: 2021-06-07 23:52:59
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linux-arch, linux-mm, lkml
On Sat, 5 Jun 2021 11:42:16 +1000 Nicholas Piggin [off-list ref] wrote:
On a 16-socket 192-core POWER8 system, a context switching benchmark with as many software threads as CPUs (so each switch will go in and out of idle), upstream can achieve a rate of about 1 million context switches per second. After this patch it goes up to 118 million.
Nice. Do we have a feel for the benefit on any real-world workloads? Could any other architectures benefit from these changes?