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

From: Arun Sharma
Subject: Re: [Libunwind-devel] problem with ms_abi on x86-64
Date: Sat, 18 Jun 2011 19:49:33 -0700

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.



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