From: Julien Grall <julien.grall@arm.com>
To: Dave Martin <Dave.Martin@arm.com>
Cc: linux-arm-kernel@lists.infradead.org, bigeasy@linutronix.de,
linux-rt-users@vger.kernel.org, catalin.marinas@arm.com,
will.deacon@arm.com, ard.biesheuvel@linaro.org,
linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH] arm64/fpsimd: Don't disable softirq when touching FPSIMD/SVE state
Date: Thu, 11 Apr 2019 15:10:28 +0100 [thread overview]
Message-ID: <0f8d6b53-6834-7363-03fc-6fd47ea49b80@arm.com> (raw)
In-Reply-To: <20190404105233.GD3567@e103592.cambridge.arm.com>
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
next prev parent reply other threads:[~2019-04-11 14:10 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-08 16:55 Julien Grall
2019-02-12 17:13 ` Julia Cartwright
2019-02-18 14:07 ` Julien Grall
2019-02-13 14:30 ` Sebastian Andrzej Siewior
2019-02-13 15:36 ` Dave Martin
2019-02-13 15:40 ` Ard Biesheuvel
2019-02-13 15:42 ` Dave Martin
2019-02-13 16:52 ` Sebastian Andrzej Siewior
2019-02-14 10:34 ` Dave Martin
2019-02-18 15:07 ` Julien Grall
2019-03-04 17:25 ` Sebastian Andrzej Siewior
2019-03-14 18:07 ` Julien Grall
2019-03-15 10:06 ` Dave Martin
2019-03-15 10:22 ` Julien Grall
2019-02-13 16:50 ` Sebastian Andrzej Siewior
2019-02-18 14:33 ` Julien Grall
2019-02-18 16:32 ` Julien Grall
2019-04-04 10:52 ` Dave Martin
2019-04-05 9:02 ` Julien Grall
2019-04-05 14:39 ` Sebastian Andrzej Siewior
2019-04-05 15:17 ` Julien Grall
2019-04-05 15:42 ` Sebastian Andrzej Siewior
2019-04-11 15:12 ` Julien Grall
2019-04-05 15:07 ` Dave Martin
2019-04-11 15:58 ` Julien Grall
2019-04-11 16:34 ` Dave Martin
2019-04-11 16:50 ` Julien Grall
2019-04-11 14:10 ` Julien Grall [this message]
2019-02-08 17:03 [PATCH 0/3] Remove reference of TIF_USEDFPU on arch not using it Julien Grall
2019-02-08 17:03 ` [RFC PATCH] arm64/fpsimd: Don't disable softirq when touching FPSIMD/SVE state Julien Grall
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