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SubjectRe: [PATCH 2/4] perf: jevents: Program to convert JSON file to C style file
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@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@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@krava perf]$ ls -l perf
-rwxrwxr-x 1 jolsa jolsa 2334816 May 28 13:49 perf


seems not that bad

jirka


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