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perf mem: Add -e record option

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Adding -e option for perf mem record command, to be able to specify
memory event directly.

Get list of available events:

  $ perf mem record -e list
  ldlat-loads
  ldlat-stores

Monitor ldlat-loads:
  $ perf mem record -e ldlat-loads true

Committer notes:

Further testing:

  # perf mem record -e ldlat-loads true
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.020 MB perf.data (10 samples) ]
  # perf evlist
  cpu/mem-loads,ldlat=30/P
  #

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1455525293-8671-6-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa
2016-02-15 09:34:35 +01:00
committed by Arnaldo Carvalho de Melo
parent acbe613e0c
commit ce1e22b08f
3 changed files with 106 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

63
tools/perf/builtin-mem.c
View File

@@ -7,6 +7,7 @@
#include "util/session.h"
#include "util/data.h"
#include "util/mem-events.h"
#include "util/debug.h"
#define MEM_OPERATION_LOAD 0x1
#define MEM_OPERATION_STORE 0x2
@@ -22,11 +23,55 @@ struct perf_mem {
DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
};
static int parse_record_events(const struct option *opt,
const char *str, int unset __maybe_unused)
{
struct perf_mem *mem = *(struct perf_mem **)opt->value;
int j;
if (strcmp(str, "list")) {
if (!perf_mem_events__parse(str)) {
mem->operation = 0;
return 0;
}
exit(-1);
}
for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) {
struct perf_mem_event *e = &perf_mem_events[j];
fprintf(stderr, "%-20s%s",
e->tag, verbose ? "" : "\n");
if (verbose)
fprintf(stderr, " [%s]\n", e->name);
}
exit(0);
}
static const char * const __usage[] = {
"perf mem record [<options>] [<command>]",
"perf mem record [<options>] -- <command> [<options>]",
NULL
};
static const char * const *record_mem_usage = __usage;
static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
{
int rec_argc, i = 0, j;
const char **rec_argv;
int ret;
struct option options[] = {
OPT_CALLBACK('e', "event", &mem, "event",
"event selector. use 'perf mem record -e list' to list available events",
parse_record_events),
OPT_INCR('v', "verbose", &verbose,
"be more verbose (show counter open errors, etc)"),
OPT_END()
};
argc = parse_options(argc, argv, options, record_mem_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
rec_argc = argc + 7; /* max number of arguments */
rec_argv = calloc(rec_argc + 1, sizeof(char *));
@@ -35,10 +80,11 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
rec_argv[i++] = "record";
if (mem->operation & MEM_OPERATION_LOAD) {
if (mem->operation & MEM_OPERATION_LOAD)
perf_mem_events[PERF_MEM_EVENTS__LOAD].record = true;
if (perf_mem_events[PERF_MEM_EVENTS__LOAD].record)
rec_argv[i++] = "-W";
}
rec_argv[i++] = "-d";
@@ -50,9 +96,19 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
rec_argv[i++] = perf_mem_events[j].name;
};
for (j = 1; j < argc; j++, i++)
for (j = 0; j < argc; j++, i++)
rec_argv[i] = argv[j];
if (verbose > 0) {
pr_debug("calling: record ");
while (rec_argv[j]) {
pr_debug("%s ", rec_argv[j]);
j++;
}
pr_debug("\n");
}
ret = cmd_record(i, rec_argv, NULL);
free(rec_argv);
return ret;
@@ -299,7 +355,6 @@ int cmd_mem(int argc, const char **argv, const char *prefix __maybe_unused)
NULL
};
argc = parse_options_subcommand(argc, argv, mem_options, mem_subcommands,
mem_usage, PARSE_OPT_STOP_AT_NON_OPTION);