linux-kernel - Re: [PATCH 01/21] perf c2c: Shared data analyser

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Message-ID: <20140218125206.GE4343@krava.brq.redhat.com>
Date:	Tue, 18 Feb 2014 13:52:06 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Don Zickus <dzickus@...hat.com>
Cc:	acme@...stprotocols.net, LKML <linux-kernel@...r.kernel.org>,
	jmario@...hat.com, fowles@...each.com, eranian@...gle.com,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Mike Galbraith <efault@....de>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Richard Fowles <rfowles@...hat.com>
Subject: Re: [PATCH 01/21] perf c2c: Shared data analyser

On Mon, Feb 10, 2014 at 12:28:56PM -0500, Don Zickus wrote:
> From: Arnaldo Carvalho de Melo <acme@...hat.com>
> 
> This is the start of a new perf tool that will collect information about
> memory accesses and analyse it to find things like hot cachelines, etc.
> 
> This is basically trying to get a prototype written by Richard Fowles
> written using the tools/perf coding style and libraries.
> 
> Start it from 'perf sched', this patch starts the process by adding the
> 'record' subcommand to collect the needed mem loads and stores samples.
> 
> It also have the basic 'report' skeleton, resolving the sample address
> and hooking the events found in a perf.data file with methods to handle
> them, right now just printing the resolved perf_sample data structure
> after each event name.

SNIP

> +		evsel->handler.func = assocs[i].handler;
> +	}
> +
> +	err = 0;
> +out:
> +	return err;
> +}
> diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
> index f5173cd..76f77c8 100644
> --- a/tools/perf/util/evlist.h
> +++ b/tools/perf/util/evlist.h
> @@ -52,6 +52,13 @@ struct perf_evsel_str_handler {
>  	void	   *handler;
>  };
>  
> +int __perf_evlist__set_handlers(struct perf_evlist *evlist,
> +				const struct perf_evsel_str_handler *assocs,
> +				size_t nr_assocs);
> +
> +#define perf_evlist__set_handlers(evlist, array) \
> +	__perf_evlist__set_handlers(evlist, array, ARRAY_SIZE(array))
> +

this is already implemented in session object.. just need to be
changed to work over any event is globaly usable

jirka
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