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Subject[PATCH 04/27] perf list: Add support for listing only json events
Date
From: Andi Kleen <ak@linux.intel.com>

Add an argument to only list json events. To be used for the command
line completion script. This requires adding a new flag to the alias
structure.

Committer notes:

Using it:

$ perf list json

Cache:
l1d.replacement
[L1D data line replacements]
l1d_pend_miss.fb_full
[Cycles a demand request was blocked due to Fill Buffers inavailability]
l1d_pend_miss.pending
[L1D miss oustandings duration in cycles]
l1d_pend_miss.pending_cycles
[Cycles with L1D load Misses outstanding]
<SNIP>
page_walker_loads.itlb_l1
[Number of ITLB page walker hits in the L1+FB]
page_walker_loads.itlb_l2
[Number of ITLB page walker hits in the L2]
page_walker_loads.itlb_l3
[Number of ITLB page walker hits in the L3 + XSNP]
tlb_flush.dtlb_thread
[DTLB flush attempts of the thread-specific entries]
tlb_flush.stlb_any
[STLB flush attempts]
$

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Suggested-and-Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/1475781807-6034-1-git-send-email-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/Documentation/perf-list.txt | 2 +-
tools/perf/builtin-list.c | 9 ++++++---
tools/perf/util/parse-events.c | 2 +-
tools/perf/util/pmu.c | 14 ++++++++++----
tools/perf/util/pmu.h | 3 ++-
5 files changed, 20 insertions(+), 10 deletions(-)

diff --git a/tools/perf/Documentation/perf-list.txt b/tools/perf/Documentation/perf-list.txt
index 41857cce5e86..50a35b27a64d 100644
--- a/tools/perf/Documentation/perf-list.txt
+++ b/tools/perf/Documentation/perf-list.txt
@@ -8,7 +8,7 @@ perf-list - List all symbolic event types
SYNOPSIS
--------
[verse]
-'perf list' [--no-desc] [--long-desc] [hw|sw|cache|tracepoint|pmu|event_glob]
+'perf list' [--no-desc] [--long-desc] [hw|sw|cache|tracepoint|pmu|json|sdt|event_glob]

DESCRIPTION
-----------
diff --git a/tools/perf/builtin-list.c b/tools/perf/builtin-list.c
index ba9322ff858b..b9ccdc7ec733 100644
--- a/tools/perf/builtin-list.c
+++ b/tools/perf/builtin-list.c
@@ -32,7 +32,7 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
OPT_END()
};
const char * const list_usage[] = {
- "perf list [<options>] [hw|sw|cache|tracepoint|pmu|sdt|event_glob]",
+ "perf list [<options>] [hw|sw|cache|tracepoint|pmu|sdt|json|event_glob]",
NULL
};

@@ -69,9 +69,12 @@ 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, false);
else if (strcmp(argv[i], "sdt") == 0)
print_sdt_events(NULL, NULL, raw_dump);
+ else if (strcmp(argv[i], "json") == 0)
+ print_pmu_events(NULL, raw_dump, !desc_flag,
+ long_desc_flag, true);
else if ((sep = strchr(argv[i], ':')) != NULL) {
int sep_idx;

@@ -100,7 +103,7 @@ 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, false);
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 4e778eae1510..948ef84e4c6a 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -2275,7 +2275,7 @@ 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, false);

if (event_glob != NULL)
return;
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index b1474dcadfa2..d8d7d4c0319c 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -224,7 +224,7 @@ static int perf_pmu__parse_snapshot(struct perf_pmu_alias *alias,

static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name,
char *desc, char *val, char *long_desc,
- char *topic)
+ char *topic, bool json)
{
struct perf_pmu_alias *alias;
int ret;
@@ -238,6 +238,7 @@ static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name,
alias->unit[0] = '\0';
alias->per_pkg = false;
alias->snapshot = false;
+ alias->json = json;

ret = parse_events_terms(&alias->terms, val);
if (ret) {
@@ -278,7 +279,7 @@ static int perf_pmu__new_alias(struct list_head *list, char *dir, char *name, FI

buf[ret] = 0;

- return __perf_pmu__new_alias(list, dir, name, NULL, buf, NULL, NULL);
+ return __perf_pmu__new_alias(list, dir, name, NULL, buf, NULL, NULL, false);
}

static inline bool pmu_alias_info_file(char *name)
@@ -537,7 +538,8 @@ static void pmu_add_cpu_aliases(struct list_head *head)
/* need type casts to override 'const' */
__perf_pmu__new_alias(head, NULL, (char *)pe->name,
(char *)pe->desc, (char *)pe->event,
- (char *)pe->long_desc, (char *)pe->topic);
+ (char *)pe->long_desc, (char *)pe->topic,
+ true);
}

out:
@@ -1103,7 +1105,7 @@ 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 json_only)
{
struct perf_pmu *pmu;
struct perf_pmu_alias *alias;
@@ -1134,6 +1136,9 @@ void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag,
format_alias(buf, sizeof(buf), pmu, alias);
bool is_cpu = !strcmp(pmu->name, "cpu");

+ if (json_only && !alias->json)
+ continue;
+
if (event_glob != NULL &&
!(strglobmatch(name, event_glob) ||
(!is_cpu && strglobmatch(alias->name,
@@ -1158,6 +1163,7 @@ void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag,
j++;
}
if (pmu->selectable &&
+ !json_only &&
(event_glob == NULL || strglobmatch(pmu->name, event_glob))) {
char *s;
if (asprintf(&s, "%s//", pmu->name) < 0)
diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
index 25712034c815..19fa2e19dbe9 100644
--- a/tools/perf/util/pmu.h
+++ b/tools/perf/util/pmu.h
@@ -49,6 +49,7 @@ struct perf_pmu_alias {
double scale;
bool per_pkg;
bool snapshot;
+ bool json;
};

struct perf_pmu *perf_pmu__find(const char *name);
@@ -75,7 +76,7 @@ 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 json_only);
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,
--
2.7.4
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