linux-kernel - Re: [PATCH 1/1] kernel/smp: Split call_single

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Message-ID: <YCI/ZrfkBOAHZyDF@hirez.programming.kicks-ass.net>
Date:   Tue, 9 Feb 2021 08:53:10 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Leonardo Bras <leobras.c@...il.com>
Cc:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Wei Yongjun <weiyongjun1@...wei.com>,
        Qais Yousef <qais.yousef@....com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] kernel/smp: Split call_single_queue into 3 queues

On Mon, Feb 08, 2021 at 02:03:47PM -0300, Leonardo Bras wrote:

> > with the patch at the bottom of the mail. This shows that in my
> > smoke test at least, the number of items in the individual list is low.
> 
> Yes, but depending on workload this list may get longer.

Get a median number of entries on the list, if you can get your median
anywhere near large enough to any of this to matter I'd be very
surprised.

This needs lots of numbers..