From: catalin.marinas@arm.com (Catalin Marinas)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/2] arm64:vdso: Rewrite gettimeofday into C.
Date: Mon, 24 Apr 2017 16:21:06 +0100 [thread overview]
Message-ID: <20170424152106.GG25449@e104818-lin.cambridge.arm.com> (raw)
In-Reply-To: <1492991221-5156-1-git-send-email-apinski@cavium.com>
On Sun, Apr 23, 2017 at 04:47:00PM -0700, Andrew Pinski wrote:
> This allows the compiler to optimize the divide by 1000.
> And remove the other divide.
>
> On ThunderX, gettimeofday improves by 32%. On ThunderX 2,
> gettimeofday improves by 18%.
Is this with or without the second patch (removing the ISB)?
--
Catalin
next prev parent reply other threads:[~2017-04-24 15:21 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-23 23:47 [PATCH 1/2] arm64:vdso: Rewrite gettimeofday into C Andrew Pinski
2017-04-23 23:47 ` [PATCH 2/2] arm64:vdso: Remove ISB from gettimeofday Andrew Pinski
2017-05-06 16:29 ` Jon Masters
[not found] ` <CY4PR07MB3415D0B108BE622CF94B205893E80@CY4PR07MB3415.namprd07.prod.outlook.com>
2017-05-06 17:38 ` Pinski, Andrew
2017-05-06 19:34 ` Jon Masters
2017-04-24 15:21 ` Catalin Marinas [this message]
2017-04-24 18:49 ` [PATCH 1/2] arm64:vdso: Rewrite gettimeofday into C Andrew Pinski
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