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Re: [Libunwind-devel] problem with ms_abi on x86-64

From: Ariel Burton
Subject: Re: [Libunwind-devel] problem with ms_abi on x86-64
Date: Mon, 20 Jun 2011 12:12:28 -0400
User-agent: Mutt/1.4.1i

The larger footprint is certainly a reasonable
explanation for a slow down.

Are those figures for local processing (i.e.,
introsepection), or from an external process?

What do you mean by `apply the patch, but diable it
by default'?  Does that mean that a compile time
switch or a runtime switch?

On Sat 18 Jun 20:49, Arun Sharma wrote:
> On Sat, Jun 18, 2011 at 10:07 AM, Lassi Tuura <address@hidden> wrote:
> > Compared to current head, I see consistent slightly over 5% slow-down with 
> > the patch
> > in our memory profiler, using the same test I used previously. The 387M 
> > stack walks
> > in ~960 secs become about ~1011 seconds with the patch. I don't think there 
> > are any
> > ms_abi frames.
> Thanks for testing. Probably the effect of a bigger dcache footprint.
> I'm inclined to apply the patch, but disable it by default.
> >
> > Under what conditions would ms_abi support / preserving SSE register state 
> > be enabled?
> > The matches I found in google codesearch were basically cygwin, wine and 
> > some EFI code.
> Ariel?
>  -Arun

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