linux-kernel - Re: [PATCH 2/8] perf, tools: Support handling complete branch stacks as histograms v4

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Message-ID: <20140307195100.GA6519@infradead.org>
Date:	Fri, 7 Mar 2014 16:51:00 -0300
From:	Arnaldo Carvalho de Melo <acme@...hat.com>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Andi Kleen <andi@...stfloor.org>, mingo@...nel.org,
	linux-kernel@...r.kernel.org, eranian@...gle.com,
	namhyung@...nel.org, Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 2/8] perf, tools: Support handling complete branch stacks
 as histograms v4

Em Fri, Mar 07, 2014 at 02:19:49PM +0100, Jiri Olsa escreveu:
> On Thu, Feb 27, 2014 at 08:22:26PM -0800, Andi Kleen wrote:
> > From: Andi Kleen <ak@...ux.intel.com>
> 
> SNIP
> 
> > index 8ad97e9..be29bb8 100644
> > --- a/tools/perf/util/callchain.h
> > +++ b/tools/perf/util/callchain.h
> > @@ -53,6 +53,7 @@ struct callchain_param {
> >  	sort_chain_func_t	sort;
> >  	enum chain_order	order;
> >  	enum chain_key		key;
> > +	bool			branch_callstack;
> >  };
> >  
> >  struct callchain_list {
> > diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
> > index ac37d78..6eff65e 100644
> > --- a/tools/perf/util/machine.c
> > +++ b/tools/perf/util/machine.c
> > @@ -11,6 +11,7 @@
> >  #include <stdbool.h>
> >  #include <symbol/kallsyms.h>
> >  #include "unwind.h"
> > +#include "linux/hash.h"
> >  
> >  int machine__init(struct machine *machine, const char *root_dir, pid_t pid)
> >  {
> > @@ -1192,17 +1193,16 @@ static const u8 cpumodes[] = {
> >  };
> >  #define NCPUMODES (sizeof(cpumodes)/sizeof(u8))
> >  
> > -static void ip__resolve_ams(struct machine *machine, struct thread *thread,
> > -			    struct addr_map_symbol *ams,
> > -			    u64 ip)
> > +static void resolve_branch_ams(struct machine *machine, struct thread *thread,
> > +			       u64 ip,
> > +			       struct addr_location *al)
> 
> the function name is confusing.. there's no branch or ams
> being dealt with in here

yeah, it should be renamed, and all it does is to try to find something
in all the possible cpu modes, so I think we should rename this to:

  thread__find_cpumode_addr_location()

And move it to right after thread__find_addr_location(), then use it
here, doing that and combining the other patches, etc, should have it in
a place for testing soon.

- Arnaldo
 
> maybe something like resolve_ip_al or resolve_ip ?
> 
> jirka
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