linux-kernel - Re: [PATCH v2 0/4] timer: Improve itimers scalability

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Message-ID: <562137F6.6080905@hpe.com>
Date:	Fri, 16 Oct 2015 10:46:30 -0700
From:	Hideaki Kimura <hideaki.kimura@....com>
To:	Jason Low <jason.low@....com>, Ingo Molnar <mingo@...nel.org>
Cc:	Jason Low <jason.low2@...com>,
	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org, Oleg Nesterov <oleg@...hat.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Davidlohr Bueso <dave@...olabs.net>,
	Steven Rostedt <rostedt@...dmis.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	George Spelvin <linux@...izon.com>, terry.rudd@....com,
	scott.norton@....com
Subject: Re: [PATCH v2 0/4] timer: Improve itimers scalability

Removing dependency to the database code is trivial. It's just 100 lines 
that launch lots of threads and do NUMA-aware memory accesses so that 
remote NUMA access cost does not affect the benchmark.

It's just a bit tedious to convert the C++11 code into C/pthread.
C++11 really spoiled me.
Still, not much work. Let me know where to post the code.

On 10/16/2015 10:34 AM, Jason Low wrote:
>> Mind posting it, so that people can stick it into a new 'perf bench timer'
>> subcommand, and/or reproduce your results with it?
>
> Yes, sure. At the moment, this micro benchmark is written in C++ and
> integrated with the database code. We can look into rewriting it into a
> more general program so that it can be included in perf.
>
> Thanks,
> Jason
>

-- 
Hideaki Kimura
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