Commit b0d745b3 authored by Jiri Olsa's avatar Jiri Olsa Committed by Arnaldo Carvalho de Melo

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.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 906a8276
......@@ -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]
......@@ -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"),
......
......@@ -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;
}
......
......@@ -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);
......
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