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From: Duncan Sands <duncan.sands@deepbluecap.com>
To: paulmck@linux.vnet.ibm.com, Ingo Molnar <mingo@kernel.org>
Cc: Michael Sullivan <sully@msully.net>,
	Peter Zijlstra <peterz@infradead.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	lttng-dev@lists.lttng.org, Thomas Gleixner <tglx@linutronix.de>,
	Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [lttng-dev] Alternative to signals/sys_membarrier() in liburcu
Date: Mon, 23 Mar 2015 10:35:10 +0100	[thread overview]
Message-ID: <550FDE4E.30201@free.fr> (raw)
In-Reply-To: <20150313141853.GE5412@linux.vnet.ibm.com>

> So, given the fact that the userspace RCU library does now see
> some real-world use, is it now time for Mathieu to resubmit his
> sys_membarrier() patch?

I'm using userspace RCU with success in financial software, so the LTTng project 
isn't the only user.  It works well, but it's not as fast as I'd like.  My 
profiling shows that the performance hit is coming from the memory barriers.  So 
I would very much like to see sys_membarrier go in.

Best wishes, Duncan.

      reply	other threads:[~2015-03-23  9:35 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CANW5cDmTCM9ZmhN7-2eWUEYvD+Y=sGt2i7mecdPTTLHMcT8fPg@mail.gmail.com>
     [not found] ` <867044376.285926.1426172227750.JavaMail.zimbra@efficios.com>
     [not found]   ` <CANW5cDkiZoysNM3rqb4v6Tj996ocsaSh=OZoBLfp4h7ZGb4bxg@mail.gmail.com>
     [not found]     ` <666590480.287502.1426193588471.JavaMail.zimbra@efficios.com>
2015-03-12 20:56       ` Alternative to signals/sys_membarrier() in liburcu Mathieu Desnoyers
2015-03-12 21:12         ` Paul E. McKenney
2015-03-14 21:06           ` Benjamin Herrenschmidt
2015-03-12 23:59         ` One Thousand Gnomes
2015-03-13  0:43           ` Mathieu Desnoyers
2015-03-12 21:47       ` Linus Torvalds
2015-03-12 22:30         ` Mathieu Desnoyers
2015-03-13  8:07           ` Ingo Molnar
2015-03-13 14:18             ` Paul E. McKenney
2015-03-23  9:35               ` Duncan Sands [this message]

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