linux-kernel - Re: What is the performance when using frame pointers in the kernel?

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Date:	Fri, 4 Dec 2009 10:25:06 -0500 (EST)
From:	Justin Piszcz <jpiszcz@...idpixels.com>
To:	Jiri Kosina <jkosina@...e.cz>
cc:	Peter Zijlstra <peterz@...radead.org>, linux-kernel@...r.kernel.org
Subject: Re: What is the performance when using frame pointers in the
 kernel?

On Fri, 4 Dec 2009, Jiri Kosina wrote:

> On Thu, 3 Dec 2009, Peter Zijlstra wrote:
>
>>> What is the performance hit when the kernel is compiled with frame
>>> pointers?
>>
>> build both kernels and run your favourite workload to find out.
>
> But generally speaking, frame pointers impose quite some performance
> penalty indeed. lmbench syscall microbenchmark can give you some hint. I
> expect you'll see approx. 10% performance increase for various syscalls if
> you disable them, as that's what we have measured lately.
>
> -- 
> Jiri Kosina
> SUSE Labs, Novell Inc.
>

Thanks for the response.. Good to know.

Justin.
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