Re: [PATCH 05/61] perf tools: Introduce c2c_decode_stats function

[Joe Mario]

On 09/19/2016 01:15 PM, Nilay Vaish wrote:
> On 19 September 2016 at 08:09, Jiri Olsa <jolsa@xxxxxxxxxx> wrote:
> > diff --git a/tools/perf/util/mem-events.h b/tools/perf/util/mem-events.h
> > index 7f69bf9d789d..27c6bb5abafb 100644
> > --- a/tools/perf/util/mem-events.h
> > +++ b/tools/perf/util/mem-events.h
> > @@ -2,6 +2,10 @@
> >  #define __PERF_MEM_EVENTS_H
> >
> >  #include <stdbool.h>
> > +#include <stdint.h>
> > +#include <stdio.h>
> > +#include <linux/types.h>
> > +#include "stat.h"
> >
> >  struct perf_mem_event {
> >         bool            record;
> > @@ -33,4 +37,36 @@ int perf_mem__lck_scnprintf(char *out, size_t sz, struct mem_info *mem_info);
> >
> >  int perf_script__meminfo_scnprintf(char *bf, size_t size, struct mem_info *mem_info);
> >
> > +struct c2c_stats {
> > +       int     nr_entries;
> > +
> > +       int     locks;               /* count of 'lock' transactions */
> > +       int     store;               /* count of all stores in trace */
> > +       int     st_uncache;          /* stores to uncacheable address */
> > +       int     st_noadrs;           /* cacheable store with no address */
>
> No address! Why would that happen?

[Resending without the html]

There are a small number of instructions that will trigger a perf mem event and will have no address associated with them.    Three of them include mfence, wrmsr, and rdtsc.    I believe there are at least two more.

> --
> Nilay