Message-ID: <1437959930.25997.33.camel@stgolabs.net>
Subject: Re: [PATCH v3 0/7] locking/qspinlock: Enhance pvqspinlock
 performance
From: Davidlohr Bueso <dave@stgolabs.net>
To: Waiman Long <Waiman.Long@hp.com>
Cc: Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@redhat.com>,
        Thomas Gleixner <tglx@linutronix.de>, "H. Peter Anvin" <hpa@zytor.com>,
        x86@kernel.org, linux-kernel@vger.kernel.org,
        Scott J Norton <scott.norton@hp.com>,
        Douglas Hatch <doug.hatch@hp.com>
Date: Sun, 26 Jul 2015 18:18:50 -0700
In-Reply-To: <1437595962-21472-1-git-send-email-Waiman.Long@hp.com>
References: <1437595962-21472-1-git-send-email-Waiman.Long@hp.com>
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On Wed, 2015-07-22 at 16:12 -0400, Waiman Long wrote:
> Patch 3 allows the collection of various count data that are useful
> to see what is happening in the system. They do add a bit of overhead
> when enabled slowing performance a tiny bit.

Ah ok you do mention the overhead. Hmmm but what's a tiny bit? A kernel
build comparison would be pretty nice to have a "usability" view.

Thanks,
Davidlohr

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