linux-kernel - Re: [PATCH v4 00/10] PCID and improved laziness

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Message-ID: <20170713193604.GA10316@codeblueprint.co.uk>
Date:   Thu, 13 Jul 2017 20:36:04 +0100
From:   Matt Fleming <matt@...eblueprint.co.uk>
To:     Andy Lutomirski <luto@...nel.org>
Cc:     X86 ML <x86@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Borislav Petkov <bp@...en8.de>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mel Gorman <mgorman@...e.de>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        Nadav Amit <nadav.amit@...il.com>,
        Rik van Riel <riel@...hat.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Arjan van de Ven <arjan@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH v4 00/10] PCID and improved laziness

On Tue, 11 Jul, at 08:00:47AM, Andy Lutomirski wrote:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/luto/misc-tests.git/
> 
> I did:
> 
> $ ./context_switch_latency_64 0 process same

Ah, that's better. I see about a 3.3% speedup with your patches when
running the context-switch benchmark.