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Date: Sun, 13 Oct 2013 23:18:05 +0200
From: Jiri Olsa <jolsa@...hat.com>
To: David Ahern <dsahern@...il.com>
Cc: Andi Kleen <andi@...stfloor.org>, Ingo Molnar <mingo@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Paul Mackerras <paulus@...ba.org>,
Namhyung Kim <namhyung.kim@....com>,
LKML <linux-kernel@...r.kernel.org>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Frederic Weisbecker <fweisbec@...il.com>
Subject: [RFC] perf record,top: Add callchain option into .perfconfig
On Sun, Oct 13, 2013 at 12:25:21PM +0200, Jiri Olsa wrote:
SNIP
>
> I'll try to come up with something later today
>
> jirka
hi,
here it is.. not fully tested, no doc updates, dont want
to go too far before we agreed on this ;-)
thanks for comments,
jirka
--
The callchain option is now used only to enable
callchains. By default it's framepointer type.
If dwarf unwind is needed, following option needs
to be added into .perfconfig:
for top command:
[top]
call-graph = dwarf,8192
for record command:
[record]
call-graph = dwarf,8192
running perf with above config like this:
perf record -g ls
perf top -G
will enable dwarf unwind. The config file option
by itself does not enable the callchain, the -g/-G
option does.
TODO: doc/help needs to be updated
Signed-off-by: Jiri Olsa <jolsa@...hat.com>
---
tools/perf/builtin-record.c | 58 ++++++++++++++++++++++++++++++---------------
tools/perf/builtin-top.c | 23 +++++++++++-------
tools/perf/perf.h | 1 +
tools/perf/util/callchain.h | 4 +++-
tools/perf/util/evsel.c | 2 +-
5 files changed, 58 insertions(+), 30 deletions(-)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 92ca541..9b245d3 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -709,19 +709,35 @@ static int get_stack_size(char *str, unsigned long *_size)
#endif /* HAVE_LIBUNWIND_SUPPORT */
int record_parse_callchain_opt(const struct option *opt,
- const char *arg, int unset)
+ const char *arg __maybe_unused,
+ int unset)
{
struct perf_record_opts *opts = opt->value;
- char *tok, *name, *saveptr = NULL;
- char *buf;
- int ret = -1;
+
+ opts->call_graph_enabled = !unset;
/* --no-call-graph */
- if (unset)
+ if (unset) {
+ opts->call_graph = CALLCHAIN_NONE;
return 0;
+ }
+
+ if (opts->call_graph == CALLCHAIN_NONE)
+ opts->call_graph = CALLCHAIN_FP;
+
+ pr_debug("callchain: type %d\n", opts->call_graph);
+
+ if (opts->call_graph == CALLCHAIN_DWARF)
+ pr_debug("callchain: stack dump size %d\n",
+ opts->stack_dump_size);
+ return 0;
+}
- /* We specified default option if none is provided. */
- BUG_ON(!arg);
+int record_parse_callchain(const char *arg, struct perf_record_opts *opts)
+{
+ char *tok, *name, *saveptr = NULL;
+ char *buf;
+ int ret = -1;
/* We need buffer that we know we can write to. */
buf = malloc(strlen(arg) + 1);
@@ -740,7 +756,7 @@ int record_parse_callchain_opt(const struct option *opt,
opts->call_graph = CALLCHAIN_FP;
ret = 0;
} else
- pr_err("callchain: No more arguments "
+ fprintf(stderr, "callchain: No more arguments "
"needed for -g fp\n");
break;
@@ -760,13 +776,9 @@ int record_parse_callchain_opt(const struct option *opt,
ret = get_stack_size(tok, &size);
opts->stack_dump_size = size;
}
-
- if (!ret)
- pr_debug("callchain: stack dump size %d\n",
- opts->stack_dump_size);
#endif /* HAVE_LIBUNWIND_SUPPORT */
} else {
- pr_err("callchain: Unknown -g option "
+ fprintf(stderr, "callchain: Unknown -g option "
"value: %s\n", arg);
break;
}
@@ -774,11 +786,17 @@ int record_parse_callchain_opt(const struct option *opt,
} while (0);
free(buf);
+ return ret;
+}
- if (!ret)
- pr_debug("callchain: type %d\n", opts->call_graph);
+static int perf_record_config(const char *var, const char *value, void *cb)
+{
+ struct perf_record *rec = cb;
- return ret;
+ if (!strcmp(var, "record.call-graph"))
+ return record_parse_callchain(value, &rec->opts);
+
+ return perf_default_config(var, value, cb);
}
static const char * const record_usage[] = {
@@ -855,9 +873,9 @@ const struct option record_options[] = {
perf_evlist__parse_mmap_pages),
OPT_BOOLEAN(0, "group", &record.opts.group,
"put the counters into a counter group"),
- OPT_CALLBACK_DEFAULT('g', "call-graph", &record.opts,
- "mode[,dump_size]", record_callchain_help,
- &record_parse_callchain_opt, "fp"),
+ OPT_CALLBACK_NOOPT('g', "call-graph", &record.opts,
+ "mode[,dump_size]", record_callchain_help,
+ &record_parse_callchain_opt),
OPT_INCR('v', "verbose", &verbose,
"be more verbose (show counter open errors, etc)"),
OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"),
@@ -906,6 +924,8 @@ int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused)
rec->evlist = evsel_list;
+ perf_config(perf_record_config, rec);
+
argc = parse_options(argc, argv, record_options, record_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
if (!argc && perf_target__none(&rec->opts.target))
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 65c49b2..b8e1b96 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1017,17 +1017,20 @@ out_delete:
static int
parse_callchain_opt(const struct option *opt, const char *arg, int unset)
{
- /*
- * --no-call-graph
- */
- if (unset)
- return 0;
-
symbol_conf.use_callchain = true;
-
return record_parse_callchain_opt(opt, arg, unset);
}
+static int perf_top_config(const char *var, const char *value, void *cb)
+{
+ struct perf_top *top = cb;
+
+ if (!strcmp(var, "top.call-graph"))
+ return record_parse_callchain(value, &top->record_opts);
+
+ return perf_default_config(var, value, cb);
+}
+
static int
parse_percent_limit(const struct option *opt, const char *arg,
int unset __maybe_unused)
@@ -1109,9 +1112,9 @@ int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
" abort, in_tx, transaction"),
OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
"Show a column with the number of samples"),
- OPT_CALLBACK_DEFAULT('G', "call-graph", &top.record_opts,
+ OPT_CALLBACK_NOOPT('G', "call-graph", &top.record_opts,
"mode[,dump_size]", record_callchain_help,
- &parse_callchain_opt, "fp"),
+ &parse_callchain_opt),
OPT_CALLBACK(0, "ignore-callees", NULL, "regex",
"ignore callees of these functions in call graphs",
report_parse_ignore_callees_opt),
@@ -1145,6 +1148,8 @@ int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
if (top.evlist == NULL)
return -ENOMEM;
+ perf_config(perf_top_config, &top);
+
argc = parse_options(argc, argv, options, top_usage, 0);
if (argc)
usage_with_options(top_usage, options);
diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index 84502e8..fed8903 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -215,6 +215,7 @@ enum perf_call_graph_mode {
struct perf_record_opts {
struct perf_target target;
int call_graph;
+ bool call_graph_enabled;
bool group;
bool inherit_stat;
bool no_delay;
diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index 2b585bc..b3e796b 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -147,6 +147,8 @@ static inline void callchain_cursor_advance(struct callchain_cursor *cursor)
struct option;
-int record_parse_callchain_opt(const struct option *opt, const char *arg, int unset);
+int record_parse_callchain_opt(const struct option *opt, const char *arg,
+ int unset);
+int record_parse_callchain(const char *arg, struct perf_record_opts *rec);
extern const char record_callchain_help[];
#endif /* __PERF_CALLCHAIN_H */
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index bfebc1e..8f3dd33 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -633,7 +633,7 @@ void perf_evsel__config(struct perf_evsel *evsel,
attr->mmap_data = track;
}
- if (opts->call_graph) {
+ if (opts->call_graph_enabled) {
perf_evsel__set_sample_bit(evsel, CALLCHAIN);
if (opts->call_graph == CALLCHAIN_DWARF) {
--
1.7.11.7
--
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