linux-kernel - Re: [RFC PATCH 1/8] Convert the RCU tasklet into a softirq

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Message-ID: <20070716205323.GA15220@elte.hu>
Date:	Mon, 16 Jul 2007 22:53:23 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Christoph Hellwig <hch@...radead.org>,
	john stultz <johnstul@...ibm.com>,
	Oleg Nesterov <oleg@...sign.ru>,
	Dipankar Sarma <dipankar@...ibm.com>,
	"David S. Miller" <davem@...emloft.net>, kuznet@....inr.ac.ru,
	Jonathan Corbet <corbet@....net>,
	Arjan van de Ven <arjan@...radead.org>,
	Arnd Bergmann <arnd@...db.de>
Subject: Re: [RFC PATCH 1/8] Convert the RCU tasklet into a softirq


* Steven Rostedt <rostedt@...dmis.org> wrote:

> But to answer your question.  No, I didn't take any actual 
> measurements. The changes just seemed obvious to me (and others).

btw., does anyone know about some reliable way to stress and measure RCU 
completion performance, via some real userspace app? I think there used 
to be an open-tons-of-files thing that unearthed the 
RCU-completion-single-threadness bottleneck a year or two ago? Anyone 
got a link to it (or to some other performance tool for RCU)?

	Ingo
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