Message-ID: <1441034105.1831.39.camel@stgolabs.net>
Subject: Re: [PATCH 1/3] timer: Optimize fastpath_timer_check()
From: Davidlohr Bueso <dave@stgolabs.net>
To: Jason Low <jason.low2@hp.com>
Cc: Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>, Oleg Nesterov <oleg@redhat.com>,
        "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
        linux-kernel@vger.kernel.org, Frederic Weisbecker <fweisbec@gmail.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Steven Rostedt <rostedt@goodmis.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Terry Rudd <terry.rudd@hp.com>, Rik van Riel <riel@redhat.com>,
        Scott J Norton <scott.norton@hp.com>
Date: Mon, 31 Aug 2015 08:15:05 -0700
In-Reply-To: <1440559068-29680-2-git-send-email-jason.low2@hp.com>
References: <1440559068-29680-1-git-send-email-jason.low2@hp.com>
	 <1440559068-29680-2-git-send-email-jason.low2@hp.com>
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On Tue, 2015-08-25 at 20:17 -0700, Jason Low wrote:
> In fastpath_timer_check(), the task_cputime() function is always
> called to compute the utime and stime values. However, this is not
> necessary if there are no per-thread timers to check for. This patch
> modifies the code such that we compute the task_cputime values only
> when there are per-thread timers set.
> 
> Signed-off-by: Jason Low <jason.low2@hp.com>

Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>

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