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Commit b0d745b3 authored by Jiri Olsa's avatar Jiri Olsa Committed by Arnaldo Carvalho de Melo
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perf mem: Add --ldlat option 



Adding --ldlat option to specify desired latency for loads event.

Specify 50 as loads event latency:

  $ perf mem record -e ldlat-loads -v --ldlat 50 true
  calling: record -W -d -e cpu/mem-loads,ldlat=50/P true

Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1465928361-2442-2-git-send-email-jolsa@kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 906a8276

tools/perf/Documentation/perf-mem.txt

+3 −0
Original line number Diff line number Diff line
@@ -56,6 +56,9 @@ OPTIONS 
--all-user::

	Configure all used events to run in user space.



--ldload::

	Specify desired latency for loads event.



SEE ALSO

--------

linkperf:perf-record[1], linkperf:perf-report[1]

tools/perf/builtin-mem.c

+1 −0
Original line number Diff line number Diff line
@@ -67,6 +67,7 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem) 
	OPT_CALLBACK('e', "event", &mem, "event",

		     "event selector. use 'perf mem record -e list' to list available events",

		     parse_record_events),

	OPT_UINTEGER(0, "ldlat", &perf_mem_events__loads_ldlat, "mem-loads latency"),

	OPT_INCR('v', "verbose", &verbose,

		 "be more verbose (show counter open errors, etc)"),

	OPT_BOOLEAN('U', "--all-user", &all_user, "collect only user level data"),

tools/perf/util/mem-events.c

+16 −1
Original line number Diff line number Diff line
@@ -10,18 +10,33 @@ 
#include "debug.h"

#include "symbol.h"



unsigned int perf_mem_events__loads_ldlat = 30;



#define E(t, n, s) { .tag = t, .name = n, .sysfs_name = s }



struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = {

	E("ldlat-loads",	"cpu/mem-loads,ldlat=30/P",	"mem-loads"),

	E("ldlat-loads",	"cpu/mem-loads,ldlat=%u/P",	"mem-loads"),

	E("ldlat-stores",	"cpu/mem-stores/P",		"mem-stores"),

};

#undef E



#undef E



static char mem_loads_name[100];

static bool mem_loads_name__init;



char *perf_mem_events__name(int i)

{

	if (i == PERF_MEM_EVENTS__LOAD) {

		if (!mem_loads_name__init) {

			mem_loads_name__init = true;

			scnprintf(mem_loads_name, sizeof(mem_loads_name),

				  perf_mem_events[i].name,

				  perf_mem_events__loads_ldlat);

		}

		return mem_loads_name;

	}



	return (char *)perf_mem_events[i].name;

}

tools/perf/util/mem-events.h

+1 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ enum { 
};



extern struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX];

extern unsigned int perf_mem_events__loads_ldlat;



int perf_mem_events__parse(const char *str);

int perf_mem_events__init(void);