linux-kernel - Re: [patch 0/3] do not raise timer softirq unconditionally (spinlockless version)

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Message-ID: <alpine.DEB.2.21.1905061121580.1637@nanos.tec.linutronix.de>
Date:   Mon, 6 May 2019 11:22:17 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Marcelo Tosatti <mtosatti@...hat.com>
cc:     linux-kernel@...r.kernel.org, linux-rt-users@...r.kernel.org,
        Anna-Maria Gleixner <anna-maria@...utronix.de>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Luiz Capitulino <lcapitulino@...hat.com>,
        Haris Okanovic <haris.okanovic@...com>
Subject: Re: [patch 0/3] do not raise timer softirq unconditionally (spinlockless
 version)

On Mon, 6 May 2019, Marcelo Tosatti wrote:
> On Mon, Apr 15, 2019 at 05:12:13PM -0300, Marcelo Tosatti wrote:
> > It handles the the race between timer addition and timer interrupt
> > execution by unconditionally (in case of isolated CPUs) raising the
> > timer softirq after making sure the updated bitmap is visible
> > on remote CPUs.
> > 
> > This patchset reduces cyclictest latency from 25us to 14us
> > on my testbox.
>
> Ping?

On my list ....