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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <37D7C6CF3E00A74B8858931C1DB2F077018CD140@SHSMSX103.ccr.corp.intel.com>
Date:	Mon, 27 Jul 2015 22:34:04 +0000
From:	"Liang, Kan" <kan.liang@...el.com>
To:	Jiri Olsa <jolsa@...hat.com>
CC:	"a.p.zijlstra@...llo.nl" <a.p.zijlstra@...llo.nl>,
	"acme@...nel.org" <acme@...nel.org>,
	"luto@...nel.org" <luto@...nel.org>,
	"mingo@...hat.com" <mingo@...hat.com>,
	"eranian@...gle.com" <eranian@...gle.com>,
	"ak@...ux.intel.com" <ak@...ux.intel.com>,
	"mark.rutland@....com" <mark.rutland@....com>,
	"Hunter, Adrian" <adrian.hunter@...el.com>,
	"jolsa@...nel.org" <jolsa@...nel.org>,
	"namhyung@...nel.org" <namhyung@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: 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@...el.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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/