Subject: Re: 'perf upgrade' (was: Re: [PATCH v9 00/11] Add support for JSON event files.)

From: Andi Kleen <[email-masked]>
Date: Fri, 17 Apr 2015 13:09:54 -0700

On Fri, Apr 17, 2015 at 05:31:26PM +0200, Jiri Olsa wrote:
> On Wed, Apr 15, 2015 at 01:50:42PM -0700, Sukadev Bhattiprolu wrote:
> 
> SNIP
> 
> > | 
> > |  - to blindly follow some poorly constructed vendor format with no 
> > |    high level structure, that IMHO didn't work very well when OProfile 
> > |    was written, and misrepresenting it as 'symbolic event names'.
> > | 
> > |    Take a look at:
> > | 
> > |      https://download.01.org/perfmon/HSW/Haswell_core_V17.json
> > | 
> > |    and weep.
> > 
> > Evil vendor formats, but to be fair, here is what _we_ have today:
> > 
> > 	perf stat -e r10068,r20036,r40060,r40ac sleep 1
> 
> hum, you could also use the 'cpu/event=.../' syntax right?

That's even worse -- same hex numbers, just more redundancy.

All the other profilers support symbolic names, which is what
users want.

-Andi

-- 
[email-masked] -- Speaking for myself only