linux-kernel - Re: [PATCH 1/2] arm64:vdso: Rewrite gettimeofday into C.

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Message-ID: <20170424152106.GG25449@e104818-lin.cambridge.arm.com>
Date:   Mon, 24 Apr 2017 16:21:06 +0100
From:   Catalin Marinas <catalin.marinas@....com>
To:     Andrew Pinski <apinski@...ium.com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] arm64:vdso: Rewrite gettimeofday into C.

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