From: Hideaki Kimura <hideaki.kimura@hpe.com>
To: Jason Low <jason.low@hpe.com>, Ingo Molnar <mingo@kernel.org>
Cc: Jason Low <jason.low2@hp.com>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
linux-kernel@vger.kernel.org, Oleg Nesterov <oleg@redhat.com>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Davidlohr Bueso <dave@stgolabs.net>,
Steven Rostedt <rostedt@goodmis.org>,
Andrew Morton <akpm@linux-foundation.org>,
George Spelvin <linux@horizon.com>,
terry.rudd@hpe.com, scott.norton@hpe.com
Subject: Re: [PATCH v2 0/4] timer: Improve itimers scalability
Date: Fri, 16 Oct 2015 10:46:30 -0700 [thread overview]
Message-ID: <562137F6.6080905@hpe.com> (raw)
In-Reply-To: <1445016853.2517.16.camel@j-VirtualBox>
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
prev parent reply other threads:[~2015-10-16 18:01 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-14 19:07 [PATCH v2 0/4] timer: Improve itimers scalability Jason Low
2015-10-14 19:07 ` [PATCH v2 1/4] timer: Optimize fastpath_timer_check() Jason Low
2015-10-15 9:27 ` [tip:timers/core] posix_cpu_timer: Optimize fastpath_timer_check( ) tip-bot for Jason Low
2015-10-14 19:07 ` [PATCH v2 2/4] timer: Check thread timers only when there are active thread timers Jason Low
2015-10-15 9:28 ` [tip:timers/core] posix_cpu_timer: " tip-bot for Jason Low
2015-10-14 19:07 ` [PATCH v2 3/4] timer: Convert cputimer->running to bool Jason Low
2015-10-15 9:28 ` [tip:timers/core] posix_cpu_timer: Convert cputimer-> running " tip-bot for Jason Low
2015-10-14 19:07 ` [PATCH v2 4/4] timer: Reduce unnecessary sighand lock contention Jason Low
2015-10-15 9:28 ` [tip:timers/core] posix_cpu_timer: " tip-bot for Jason Low
2015-10-14 21:18 ` [PATCH v2 0/4] timer: Improve itimers scalability George Spelvin
2015-10-15 12:30 ` Frederic Weisbecker
2015-10-15 19:00 ` Jason Low
2015-10-15 8:47 ` Ingo Molnar
2015-10-15 19:01 ` Jason Low
2015-10-16 7:12 ` Ingo Molnar
2015-10-16 17:34 ` Jason Low
2015-10-16 17:46 ` Hideaki Kimura [this message]
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