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From: Steven Rostedt <srostedt@redhat.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	Jeremy Fitzhardinge <jeremy@goop.org>,
	LKML <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>,
	Peter Zijlstra <peterz@infradead.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	David Miller <davem@davemloft.net>,
	Roland McGrath <roland@redhat.com>,
	Ulrich Drepper <drepper@redhat.com>,
	Rusty Russell <rusty@rustcorp.com.au>,
	Gregory Haskins <ghaskins@novell.com>,
	Arnaldo Carvalho de Melo <acme@redhat.com>,
	"Luis Claudio R. Goncalves" <lclaudio@uudg.org>,
	Clark Williams <williams@redhat.com>
Subject: Re: Efficient x86 and x86_64 NOP microbenchmarks
Date: Wed, 13 Aug 2008 16:21:52 -0400	[thread overview]
Message-ID: <48A34260.3070506@redhat.com> (raw)
In-Reply-To: <20080813201532.GR1366@one.firstfloor.org>

Andi Kleen wrote:
> On Wed, Aug 13, 2008 at 04:00:37PM -0400, Steven Rostedt wrote:
>   
>>> Now the numbers have shown that just by not using frame pointer (
>>> -pg right now implies frame pointer) you can get more benefit 
>>> than what you lose from using non optimal nops.
>>>  
>>>       
>> No, I can easily make a patch that does not use frame pointers but still 
>>     
>
> Not without patching gcc. Try it. The patch is not very difficult and i did
> it here, but it needs a patch. 
>   

OK, I admit you are right ;-)

I got the error message:

    gcc: -pg and -fomit-frame-pointer are incompatible

-- Steve


  parent reply	other threads:[~2008-08-13 20:22 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20080813191926.GB15547@Krystal>
2008-08-13 20:00 ` Efficient x86 and x86_64 NOP microbenchmarks Steven Rostedt
2008-08-13 20:06   ` Jeremy Fitzhardinge
2008-08-13 20:34     ` Steven Rostedt
2008-08-13 20:15   ` Andi Kleen
2008-08-13 20:21     ` Linus Torvalds
2008-08-13 20:21     ` Steven Rostedt [this message]
2008-08-08 18:13 [PATCH 0/5] ftrace: to kill a daemon Steven Rostedt
2008-08-08 18:21 ` Mathieu Desnoyers
2008-08-08 18:41   ` Steven Rostedt
2008-08-08 19:05     ` Mathieu Desnoyers
2008-08-08 23:38       ` Steven Rostedt
2008-08-09  0:23         ` Andi Kleen
2008-08-09  0:36           ` Steven Rostedt
2008-08-09  0:47             ` Jeremy Fitzhardinge
2008-08-09  0:51               ` Linus Torvalds
2008-08-09  1:25                 ` Steven Rostedt
2008-08-13 17:52                   ` Efficient x86 and x86_64 NOP microbenchmarks Mathieu Desnoyers
2008-08-13 18:27                     ` Linus Torvalds
2008-08-13 18:41                       ` Andi Kleen
2008-08-13 18:45                         ` Avi Kivity
2008-08-13 18:51                           ` Andi Kleen
2008-08-13 18:56                             ` Avi Kivity
2008-08-13 19:30                         ` Mathieu Desnoyers
2008-08-13 19:37                           ` Andi Kleen
2008-08-13 20:01                             ` Mathieu Desnoyers
2008-08-15 21:34                             ` Steven Rostedt
2008-08-15 21:51                               ` Andi Kleen
2008-08-13 19:16                       ` Mathieu Desnoyers

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