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Message-Id: <1456257652-20059-6-git-send-email-acme@kernel.org>
Date: Tue, 23 Feb 2016 17:00:46 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ingo Molnar <mingo@...nel.org>
Cc: linux-kernel@...r.kernel.org, Jiri Olsa <jolsa@...nel.org>,
Andi Kleen <ak@...ux.intel.com>,
David Ahern <dsahern@...il.com>,
Namhyung Kim <namhyung@...nel.org>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Stephane Eranian <eranian@...gle.com>,
Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 05/11] perf mem: Add -e record option
From: Jiri Olsa <jolsa@...nel.org>
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@...nel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Stephane Eranian <eranian@...gle.com>
Link: http://lkml.kernel.org/r/1455525293-8671-6-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
tools/perf/builtin-mem.c | 63 +++++++++++++++++++++++++++++++++++++++++---
tools/perf/util/mem-events.c | 47 ++++++++++++++++++++++++++++++---
tools/perf/util/mem-events.h | 3 +++
3 files changed, 106 insertions(+), 7 deletions(-)
diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c
index 36c56a4b778b..b3f8a89ede40 100644
--- a/tools/perf/builtin-mem.c
+++ b/tools/perf/builtin-mem.c
@@ -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);
diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c
index c6ba0a19ec9a..b1507c04b257 100644
--- a/tools/perf/util/mem-events.c
+++ b/tools/perf/util/mem-events.c
@@ -1,10 +1,51 @@
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
#include "mem-events.h"
+#include "debug.h"
-#define E(n) { .name = n }
+#define E(t, n) { .tag = t, .name = n }
struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = {
- E("cpu/mem-loads,ldlat=30/P"),
- E("cpu/mem-stores/P"),
+ E("ldlat-loads", "cpu/mem-loads,ldlat=30/P"),
+ E("ldlat-stores", "cpu/mem-stores/P"),
};
#undef E
+
+int perf_mem_events__parse(const char *str)
+{
+ char *tok, *saveptr = NULL;
+ bool found = false;
+ char *buf;
+ int j;
+
+ /* We need buffer that we know we can write to. */
+ buf = malloc(strlen(str) + 1);
+ if (!buf)
+ return -ENOMEM;
+
+ strcpy(buf, str);
+
+ tok = strtok_r((char *)buf, ",", &saveptr);
+
+ while (tok) {
+ for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) {
+ struct perf_mem_event *e = &perf_mem_events[j];
+
+ if (strstr(e->tag, tok))
+ e->record = found = true;
+ }
+
+ tok = strtok_r(NULL, ",", &saveptr);
+ }
+
+ free(buf);
+
+ if (found)
+ return 0;
+
+ pr_err("failed: event '%s' not found, use '-e list' to get list of available events\n", str);
+ return -1;
+}
diff --git a/tools/perf/util/mem-events.h b/tools/perf/util/mem-events.h
index c97b21465fa9..2995bae6ac33 100644
--- a/tools/perf/util/mem-events.h
+++ b/tools/perf/util/mem-events.h
@@ -5,6 +5,7 @@
struct perf_mem_event {
bool record;
+ const char *tag;
const char *name;
};
@@ -16,4 +17,6 @@ enum {
extern struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX];
+int perf_mem_events__parse(const char *str);
+
#endif /* __PERF_MEM_EVENTS_H */
--
2.5.0
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