linux-kernel - Re: [PATCH v2 0/5] Add NUMA-awareness to qspinlock

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Message-ID: <20190401090943.GG11158@hirez.programming.kicks-ass.net>
Date:   Mon, 1 Apr 2019 11:09:43 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Alex Kogan <alex.kogan@...cle.com>
Cc:     linux@...linux.org.uk, mingo@...hat.com, will.deacon@....com,
        arnd@...db.de, longman@...hat.com, linux-arch@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        tglx@...utronix.de, bp@...en8.de, hpa@...or.com, x86@...nel.org,
        steven.sistare@...cle.com, daniel.m.jordan@...cle.com,
        dave.dice@...cle.com, rahul.x.yadav@...cle.com
Subject: Re: [PATCH v2 0/5] Add NUMA-awareness to qspinlock

On Fri, Mar 29, 2019 at 11:20:01AM -0400, Alex Kogan wrote:
> The following locktorture results are from an Oracle X5-4 server
> (four Intel Xeon E7-8895 v3 @ 2.60GHz sockets with 18 hyperthreaded
> cores each). 

The other interesting number is on a !NUMA machine. What do these
patches do there? Remember, most people do not in fact have numa.