Subject: Re: [RFC 0/4] tracing,x86_64 - function/graph trace without
 mcount/-pg/framepointer
From: Steven Rostedt <rostedt@goodmis.org>
To: Josh Triplett <josh@joshtriplett.org>
Cc: linux-kernel@vger.kernel.org
In-Reply-To: <20110207212220.GA30070@feather>
References: <20110207212220.GA30070@feather>
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Date: Mon, 07 Feb 2011 16:32:47 -0500
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On Mon, 2011-02-07 at 13:22 -0800, Josh Triplett wrote:

> GCC 4.6 may help here.  According to
> http://gcc.gnu.org/gcc-4.6/changes.html:
> 
> "Support for emitting profiler counter calls before function prologues.
> This is enabled via a new command-line option -mfentry."
> 
> Looks like that option might only support x86 (32-bit and 64-bit) at the
> moment, but it still seems like an improvement over the current
> mechanism to work around GCC's placement of mcount.
> 

I may need to download this and try it out.

Thanks for the reference!

-- Steve


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