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Subject[PATCH 13/13] perf, tools, list: Move extra details printing to new option
Date
From: Andi Kleen <ak@linux.intel.com>

Move the printing of perf expressions and internal events to a
new clearer --details flag, instead of lumping it together
with other debug options in --debug. This makes it clearer
to use.

Before

perf list --debug
...
unc_m_power_critical_throttle_cycles
[Cycles all ranks are in critical thermal throttle. Unit: uncore_imc]
uncore_imc_2/event=0x86/ MetricName: power_critical_throttle_cycles % MetricExpr: (unc_m_power_critical_throttle_cycles / unc_m_clockticks) * 100.

after

perf list --details
...
unc_m_power_critical_throttle_cycles
[Cycles all ranks are in critical thermal throttle. Unit: uncore_imc]
uncore_imc_2/event=0x86/ MetricName: power_critical_throttle_cycles % MetricExpr: (unc_m_power_critical_throttle_cycles / unc_m_clockticks) * 100.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
tools/perf/Documentation/perf-list.txt | 4 ++++
tools/perf/builtin-list.c | 14 ++++++++++----
tools/perf/util/parse-events.c | 5 +++--
tools/perf/util/parse-events.h | 2 +-
tools/perf/util/pmu.c | 4 ++--
tools/perf/util/pmu.h | 2 +-
6 files changed, 21 insertions(+), 10 deletions(-)

diff --git a/tools/perf/Documentation/perf-list.txt b/tools/perf/Documentation/perf-list.txt
index 41857cce5e86..143d98df2df9 100644
--- a/tools/perf/Documentation/perf-list.txt
+++ b/tools/perf/Documentation/perf-list.txt
@@ -24,6 +24,10 @@ Don't print descriptions.
--long-desc::
Print longer event descriptions.

+--details::
+Print how named events are resolved internally into perf events, and also
+any extra expressions computed by perf stat.
+

[[EVENT_MODIFIERS]]
EVENT MODIFIERS
diff --git a/tools/perf/builtin-list.c b/tools/perf/builtin-list.c
index 3b9d98b5feef..be9195e95c78 100644
--- a/tools/perf/builtin-list.c
+++ b/tools/perf/builtin-list.c
@@ -18,6 +18,7 @@
#include <subcmd/parse-options.h>

static bool desc_flag = true;
+static bool details_flag;

int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
{
@@ -30,6 +31,8 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
"Print extra event descriptions. --no-desc to not print."),
OPT_BOOLEAN('v', "long-desc", &long_desc_flag,
"Print longer event descriptions."),
+ OPT_BOOLEAN(0, "details", &details_flag,
+ "Print information on the perf event names and expressions used internally by events."),
OPT_INCR(0, "debug", &verbose,
"Enable debugging output"),
OPT_END()
@@ -50,7 +53,8 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
printf("\nList of pre-defined events (to be used in -e):\n\n");

if (argc == 0) {
- print_events(NULL, raw_dump, !desc_flag, long_desc_flag);
+ print_events(NULL, raw_dump, !desc_flag, long_desc_flag,
+ details_flag);
return 0;
}

@@ -72,7 +76,7 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
print_hwcache_events(NULL, raw_dump);
else if (strcmp(argv[i], "pmu") == 0)
print_pmu_events(NULL, raw_dump, !desc_flag,
- long_desc_flag);
+ long_desc_flag, details_flag);
else if (strcmp(argv[i], "sdt") == 0)
print_sdt_events(NULL, NULL, raw_dump);
else if ((sep = strchr(argv[i], ':')) != NULL) {
@@ -80,7 +84,8 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)

if (sep == NULL) {
print_events(argv[i], raw_dump, !desc_flag,
- long_desc_flag);
+ long_desc_flag,
+ details_flag);
continue;
}
sep_idx = sep - argv[i];
@@ -103,7 +108,8 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
event_symbols_sw, PERF_COUNT_SW_MAX, raw_dump);
print_hwcache_events(s, raw_dump);
print_pmu_events(s, raw_dump, !desc_flag,
- long_desc_flag);
+ long_desc_flag,
+ details_flag);
print_tracepoint_events(NULL, s, raw_dump);
print_sdt_events(NULL, s, raw_dump);
free(s);
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 119eb0b65876..6b498aea9fde 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -2325,7 +2325,7 @@ void print_symbol_events(const char *event_glob, unsigned type,
* Print the help text for the event symbols:
*/
void print_events(const char *event_glob, bool name_only, bool quiet_flag,
- bool long_desc)
+ bool long_desc, bool details_flag)
{
print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
@@ -2335,7 +2335,8 @@ void print_events(const char *event_glob, bool name_only, bool quiet_flag,

print_hwcache_events(event_glob, name_only);

- print_pmu_events(event_glob, name_only, quiet_flag, long_desc);
+ print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
+ details_flag);

if (event_glob != NULL)
return;
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index f38086b8dbea..a235f4d6d5e5 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -184,7 +184,7 @@ void parse_events_evlist_error(struct parse_events_evlist *data,
int idx, const char *str);

void print_events(const char *event_glob, bool name_only, bool quiet,
- bool long_desc);
+ bool long_desc, bool details_flag);

struct event_symbol {
const char *symbol;
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index bcf752fa345b..362051ea7f3d 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -1154,7 +1154,7 @@ static void wordwrap(char *s, int start, int max, int corr)
}

void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag,
- bool long_desc)
+ bool long_desc, bool details_flag)
{
struct perf_pmu *pmu;
struct perf_pmu_alias *alias;
@@ -1246,7 +1246,7 @@ void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag,
printf("%*s", 8, "[");
wordwrap(aliases[j].desc, 8, columns, 0);
printf("]\n");
- if (verbose > 0) {
+ if (details_flag) {
printf("%*s%s/%s/ ", 8, "", aliases[j].pmu, aliases[j].str);
if (aliases[j].metric_name)
printf(" MetricName: %s", aliases[j].metric_name);
diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
index 3d4b703f5d89..ea7f450dc609 100644
--- a/tools/perf/util/pmu.h
+++ b/tools/perf/util/pmu.h
@@ -80,7 +80,7 @@ int perf_pmu__format_parse(char *dir, struct list_head *head);
struct perf_pmu *perf_pmu__scan(struct perf_pmu *pmu);

void print_pmu_events(const char *event_glob, bool name_only, bool quiet,
- bool long_desc);
+ bool long_desc, bool details_flag);
bool pmu_have_event(const char *pname, const char *name);

int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt,
--
2.9.3
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