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Commit 92062d54 authored by Jiri Olsa's avatar Jiri Olsa Committed by Arnaldo Carvalho de Melo
Browse files

perf c2c report: Add stats related sort keys 



It is to be displayed in the single cacheline output:

  median, mean_rmt, mean_lcl, mean_load, stddev

It displays statistics hits related to cacheline accesses.

Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Joe Mario <jmario@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-m1r4uc9lcykf1jhpvwk2gkj8@git.kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 1e181b92

tools/perf/builtin-c2c.c

+80 −0
Original line number Diff line number Diff line
@@ -20,11 +20,20 @@ struct c2c_hists { 
	struct c2c_stats	stats;

};



struct compute_stats {

	struct stats		 lcl_hitm;

	struct stats		 rmt_hitm;

	struct stats		 load;

};



struct c2c_hist_entry {

	struct c2c_hists	*hists;

	struct c2c_stats	 stats;

	unsigned long		*cpuset;

	struct c2c_stats	*node_stats;



	struct compute_stats	 cstats;



	/*

	 * must be at the end,

	 * because of its callchain dynamic entry
@@ -61,6 +70,10 @@ static void *c2c_he_zalloc(size_t size) 
	if (!c2c_he->node_stats)

		return NULL;



	init_stats(&c2c_he->cstats.lcl_hitm);

	init_stats(&c2c_he->cstats.rmt_hitm);

	init_stats(&c2c_he->cstats.load);



	return &c2c_he->he;

}
@@ -122,6 +135,20 @@ static void c2c_he__set_cpu(struct c2c_hist_entry *c2c_he, 
	set_bit(sample->cpu, c2c_he->cpuset);

}



static void compute_stats(struct c2c_hist_entry *c2c_he,

			  struct c2c_stats *stats,

			  u64 weight)

{

	struct compute_stats *cstats = &c2c_he->cstats;



	if (stats->rmt_hitm)

		update_stats(&cstats->rmt_hitm, weight);

	else if (stats->lcl_hitm)

		update_stats(&cstats->lcl_hitm, weight);

	else if (stats->load)

		update_stats(&cstats->load, weight);

}



static int process_sample_event(struct perf_tool *tool __maybe_unused,

				union perf_event *event,

				struct perf_sample *sample,
@@ -200,6 +227,8 @@ static int process_sample_event(struct perf_tool *tool __maybe_unused, 
		c2c_add_stats(&c2c_hists->stats, &stats);

		c2c_add_stats(&c2c_he->node_stats[node], &stats);



		compute_stats(c2c_he, &stats, sample->weight);



		c2c_he__set_cpu(c2c_he, sample);



		hists__inc_nr_samples(&c2c_hists->hists, he->filtered);
@@ -962,6 +991,30 @@ node_entry(struct perf_hpp_fmt *fmt __maybe_unused, struct perf_hpp *hpp, 
	return 0;

}



static int

mean_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,

	   struct hist_entry *he, double mean)

{

	int width = c2c_width(fmt, hpp, he->hists);

	char buf[10];



	scnprintf(buf, 10, "%6.0f", mean);

	return scnprintf(hpp->buf, hpp->size, "%*s", width, buf);

}



#define MEAN_ENTRY(__func, __val)						\

static int									\

__func(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp, struct hist_entry *he)	\

{										\

	struct c2c_hist_entry *c2c_he;						\

	c2c_he = container_of(he, struct c2c_hist_entry, he);			\

	return mean_entry(fmt, hpp, he, avg_stats(&c2c_he->cstats.__val));	\

}



MEAN_ENTRY(mean_rmt_entry,  rmt_hitm);

MEAN_ENTRY(mean_lcl_entry,  lcl_hitm);

MEAN_ENTRY(mean_load_entry, load);



#define HEADER_LOW(__h)			\

	{				\

		.line[1] = {		\
@@ -1264,6 +1317,30 @@ static struct c2c_dimension dim_node = { 
	.width		= 4,

};



static struct c2c_dimension dim_mean_rmt = {

	.header		= HEADER_SPAN("---------- cycles ----------", "rmt hitm", 2),

	.name		= "mean_rmt",

	.cmp		= empty_cmp,

	.entry		= mean_rmt_entry,

	.width		= 8,

};



static struct c2c_dimension dim_mean_lcl = {

	.header		= HEADER_SPAN_LOW("lcl hitm"),

	.name		= "mean_lcl",

	.cmp		= empty_cmp,

	.entry		= mean_lcl_entry,

	.width		= 8,

};



static struct c2c_dimension dim_mean_load = {

	.header		= HEADER_SPAN_LOW("load"),

	.name		= "mean_load",

	.cmp		= empty_cmp,

	.entry		= mean_load_entry,

	.width		= 8,

};



static struct c2c_dimension *dimensions[] = {

	&dim_dcacheline,

	&dim_offset,
@@ -1298,6 +1375,9 @@ static struct c2c_dimension *dimensions[] = { 
	&dim_symbol,

	&dim_dso,

	&dim_node,

	&dim_mean_rmt,

	&dim_mean_lcl,

	&dim_mean_load,

	NULL,

};