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Date: Thu, 11 Apr 2019 15:10:28 +0100 From: Julien Grall <julien.grall@....com> To: Dave Martin <Dave.Martin@....com> Cc: linux-arm-kernel@...ts.infradead.org, bigeasy@...utronix.de, linux-rt-users@...r.kernel.org, catalin.marinas@....com, will.deacon@....com, ard.biesheuvel@...aro.org, linux-kernel@...r.kernel.org Subject: Re: [RFC PATCH] arm64/fpsimd: Don't disable softirq when touching FPSIMD/SVE state Hi Dave, On 4/4/19 11:52 AM, Dave Martin wrote: > On Fri, Feb 08, 2019 at 04:55:13PM +0000, Julien Grall wrote: > I'm not sure how this patch will affect context switch overhead, so it > would be good to see hackbench numbers (or similar). I finally have some numbers for this patch. The benchmark was ran using Linux 5.1-rc4 and defconfig. On Juno2: * hackbench 100 process 1000 (10 times) * .7% quicker On ThunderX 2: * hackbench 1000 process 1000 (20 times) * 3.4% quicker I am happy to try other benchmark if you think it is useful. Anyway, I will resend the series with the comments addressed. Cheers, -- Julien Grall
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