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Subject: Re: [RFC PATCH 2/9] perf: Add ability to dump user regs
From: Peter Zijlstra <peterz@infradead.org>
To: Frederic Weisbecker <fweisbec@gmail.com>
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Date: Sun, 17 Oct 2010 12:07:03 +0200
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On Sat, 2010-10-16 at 00:58 +0200, Frederic Weisbecker wrote:
> > Yes, PEBS does not capture the entire state.
> > 
> > Here is what you get on Intel Core:
> >         u64 flags, ip;
> >         u64 ax, bx, cx, dx;
> >         u64 si, di, bp, sp;
> >         u64 r8,  r9,  r10, r11;
> >         u64 r12, r13, r14, r15;

> Ok, that seems to cover most of the state. I guess few people care
> about cs, ds, es, fs, gs, most of the time. 

Yeah, except if you want to profile wine or something like that ;-)