linux-kernel - Re: [PATCH v4.16-rc4 2/2] x86/vdso: on Intel, VDSO should handle CLOCK_MONOTONIC

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Message-ID: <20180312082741.GD4064@hirez.programming.kicks-ass.net>
Date:   Mon, 12 Mar 2018 09:27:41 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Jason Vas Dias <jason.vas.dias@...il.com>
Cc:     x86@...nel.org, LKML <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        andi <andi@...stfloor.org>
Subject: Re: [PATCH v4.16-rc4 2/2] x86/vdso: on Intel, VDSO should handle
 CLOCK_MONOTONIC_RAW

On Mon, Mar 12, 2018 at 07:01:20AM +0000, Jason Vas Dias wrote:
>   Sometimes, particularly when correlating elapsed time to performance
>   counter values, 

So what actual problem are you tring to solve here? Perf can already
give you sample time in various clocks, including MONOTONIC_RAW.