linux-kernel - RE: [PATCH RFC 02/10] perf,tools: Support new sort type --socket

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Date:	Mon, 24 Aug 2015 14:22:08 +0000
From:	"Liang, Kan" <kan.liang@...el.com>
To:	Jiri Olsa <jolsa@...hat.com>
CC:	"acme@...nel.org" <acme@...nel.org>,
	"a.p.zijlstra@...llo.nl" <a.p.zijlstra@...llo.nl>,
	"mingo@...hat.com" <mingo@...hat.com>,
	"jolsa@...nel.org" <jolsa@...nel.org>,
	"namhyung@...nel.org" <namhyung@...nel.org>,
	"ak@...ux.intel.com" <ak@...ux.intel.com>,
	"eranian@...gle.com" <eranian@...gle.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH RFC 02/10] perf,tools: Support new sort type --socket

> 
> On Fri, Aug 21, 2015 at 08:25:24PM +0000, Liang, Kan wrote:
> 
> SNIP
> 
> > >
> > > we need global topology information in perf.data and use the mapping
> > > from there, we can't use current server info
> > >
> > > we currently store core_siblings_list and thread_siblings_list, in
> > > topology FEATURE, which is probably not enough
> > >
> >
> > core_siblings_list  includes the cpu list in the same socket.
> > thread_siblings_list includes the cpu list in the same core.
> > numa_nodes includes the cpu list for each node.
> >
> > It looks we have enough data from topology FEATURE.
> 
> hum, haven't hecked deeply.. how will you get core id for cpu?
>

from thread_siblings_list.
 I just noticed that svg_build_topology_map did the similar thing to
get topology map for timechart from perf header.

> >
> > What do you think about the function as below?
> > It gets the socket id from env.
> 
> some sort of caching would be nice, I guess we could store those cpumap
> objects within perf_session_env

Yes it will be stored in perf_session_env.

Thanks,
Kan
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