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RE: [PATCH V2 5/6] perf,tools: caculate and save freq/CPU%/CORE_BUSY% in he_stat

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  RE: [PATCH V2 5/6] perf,tools: caculate and save  freq/CPU%/CORE_BUSY% in he_stat "Liang, Kan" <kan.liang@intel.com> - 2015-07-28 00:40 +0200

#1193539 — RE: [PATCH V2 5/6] perf,tools: caculate and save freq/CPU%/CORE_BUSY% in he_stat

> 
> On Fri, Jul 24, 2015 at 09:48:31AM -0400, kan.liang@intel.com wrote:
> 
> SNIP
> 
> >  		},
> >  		.parent = sym_parent,
> >  		.filtered = symbol__parent_filter(sym_parent) | al-
> >filtered, @@
> > -481,6 +486,32 @@ iter_add_next_nop_entry(struct hist_entry_iter
> *iter
> > __maybe_unused,  }
> >
> >  static int
> > +iter_add_single_freq_perf_entry(struct hist_entry_iter *iter, struct
> > +addr_location *al) {
> > +	struct perf_evsel *evsel = iter->evsel;
> > +	struct perf_sample *sample = iter->sample;
> > +	struct hist_entry *he;
> > +	struct freq_perf_info info = {0};
> > +	u64 *data = sample->freq_perf_data;
> > +
> > +	if (data[FREQ_PERF_REF_CYCLES] > 0)
> > +		info.freq = (data[FREQ_PERF_CYCLES] * cpu_max_freq) /
> data[FREQ_PERF_REF_CYCLES];
> > +	if (data[FREQ_PERF_TSC] > 0)
> > +		info.cpu_u = (100 * data[FREQ_PERF_REF_CYCLES]) /
> data[FREQ_PERF_TSC];
> > +	if (data[FREQ_PERF_MPERF] > 0)
> > +		info.core_busy = (100 * data[FREQ_PERF_APERF]) /
> > +data[FREQ_PERF_MPERF];
> 
> seems to me the new iterator is too big gun for this, why not initialize
> 'struct freq_perf_info' in iter_prepare_normal_entry ?
> 
How about initializing in iter_add_single_normal_entry?

We only use freq_perf_info in iter_add_single_normal_entry.
If initializing in iter_prepare_normal_entry, we have to save the
freq_perf_info in hist_entry_iter.

Thanks,
Kan
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