[PATCH 2/4] perf: jevents: Program to convert JSON file to C style file

Jiri Olsa jolsa at redhat.com
Thu May 28 21:52:23 AEST 2015

On Wed, May 27, 2015 at 11:59:04PM +0900, Namhyung Kim wrote:
> Hi Andi,
> On Wed, May 27, 2015 at 11:40 PM, Andi Kleen <ak at linux.intel.com> wrote:
> >> So we build tables of all models in the architecture, and choose
> >> matching one when compiling perf, right?  Can't we do that when
> >> building the tables?  IOW, why don't we check the VFM and discard
> >> non-matching tables?  Those non-matching tables are also needed?
> >
> > We build it for all cpus in an architecture, not all architectures.
> > So e.g. for an x86 binary power is not included, and vice versa.
> OK.
> > It always includes all CPUs for a given architecture, so it's possible
> > to use the perf binary on other systems than just the one it was
> > build on.
> So it selects one at run-time not build-time, good.  But I worry about
> the size of the intel tables.  How large are they?  Maybe we can make
> it dynamic-loadable if needed..

just compiled Sukadev's new version with Andi's events list
and stripped binary size is:

[jolsa at krava perf]$ ls -l perf
-rwxrwxr-x 1 jolsa jolsa 2772640 May 28 13:49 perf

while perf on Arnaldo's perf/core is:

[jolsa at krava perf]$ ls -l perf
-rwxrwxr-x 1 jolsa jolsa 2334816 May 28 13:49 perf

seems not that bad


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