From: Florian Weimer <fweimer@redhat.com>
To: Andy Lutomirski <luto@kernel.org>, Matt Rickard <matt@softrans.com.au>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Stephen Boyd <sboyd@kernel.org>,
John Stultz <john.stultz@linaro.org>, X86 ML <x86@kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v3] x86/vdso: Handle clock_gettime(CLOCK_TAI) in vDSO
Date: Sat, 1 Sep 2018 11:33:38 +0200 [thread overview]
Message-ID: <0a94774a-6b8b-2014-93e6-131af9c319a6@redhat.com> (raw)
In-Reply-To: <CALCETrU4PzskO9pE6G4EkXNRRX3Mu7Vvjv1P8XgrfRMdgGDZSg@mail.gmail.com>
On 09/01/2018 05:39 AM, Andy Lutomirski wrote:
> Florian, do you think
> glibc would be willing to add some magic to turn
> clock_gettime(CLOCK_MONOTONIC, t) into
> __vdso_clock_gettime_monotonic(t) when CLOCK_MONOTONIC is a constant?
What's the goal here? Turn the indirect call/conditional jump/indirect
call sequence into a single indirect call, purely for performance reasons?
Thanks,
Florian
next prev parent reply other threads:[~2018-09-01 9:33 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-01 1:59 Matt Rickard
2018-09-01 3:39 ` Andy Lutomirski
2018-09-01 9:33 ` Florian Weimer [this message]
2018-09-01 17:37 ` Andy Lutomirski
2018-09-09 20:05 ` Thomas Gleixner
2018-09-10 10:38 ` Thomas Gleixner
2018-09-12 13:01 ` Florian Weimer
2018-09-12 14:17 ` Thomas Gleixner
2018-09-12 14:20 ` Florian Weimer
2018-09-12 14:29 ` Thomas Gleixner
2018-09-12 17:11 ` Andy Lutomirski
2018-09-13 8:07 ` Florian Weimer
2018-09-13 15:22 ` Andy Lutomirski
2018-09-13 19:07 ` Florian Weimer
2018-09-13 19:35 ` Andy Lutomirski
2018-09-13 19:53 ` Florian Weimer
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