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perf list: Support long jevents descriptions 

Previously we were dropping the useful longer descriptions that some
events have in the event list completely. This patch makes them appear with
perf list.

Old perf list:

baclears:
  baclears.all
       [Counts the number of baclears]

vs new:

perf list -v:
...
baclears:
  baclears.all
       [The BACLEARS event counts the number of times the front end is
        resteered, mainly when the Branch Prediction Unit cannot provide
        a correct prediction and this is corrected by the Branch Address
        Calculator at the front end. The BACLEARS.ANY event counts the
        number of baclears for any type of branch]

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linuxppc-dev@lists.ozlabs.org
Link: http://lkml.kernel.org/r/1473978296-20712-13-git-send-email-sukadev@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Sukadev Bhattiprolu 2016-09-15 15:24:48 -07:00 committed by Arnaldo Carvalho de Melo
parent 794ba54a83
commit c8d6828a65
6 changed files with 34 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
tools/perf/Documentation/perf-list.txt
View File

@ -8,7 +8,7 @@ perf-list - List all symbolic event types
SYNOPSIS
--------
[verse]
'perf list' [--no-desc] [hw|sw|cache|tracepoint|pmu|event_glob]
'perf list' [--no-desc] [--long-desc] [hw|sw|cache|tracepoint|pmu|event_glob]
DESCRIPTION
-----------
@ -20,6 +20,10 @@ OPTIONS
--no-desc::
Don't print descriptions.
-v::
--long-desc::
Print longer event descriptions.
[[EVENT_MODIFIERS]]
EVENT MODIFIERS

16
tools/perf/builtin-list.c
View File

@ -22,14 +22,17 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
{
int i;
bool raw_dump = false;
bool long_desc_flag = false;
struct option list_options[] = {
OPT_BOOLEAN(0, "raw-dump", &raw_dump, "Dump raw events"),
OPT_BOOLEAN('d', "desc", &desc_flag,
"Print extra event descriptions. --no-desc to not print."),
OPT_BOOLEAN('v', "long-desc", &long_desc_flag,
"Print longer event descriptions."),
OPT_END()
};
const char * const list_usage[] = {
"perf list [--no-desc] [hw|sw|cache|tracepoint|pmu|sdt|event_glob]",
"perf list [<options>] [hw|sw|cache|tracepoint|pmu|sdt|event_glob]",
NULL
};
@ -44,7 +47,7 @@ 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);
print_events(NULL, raw_dump, !desc_flag, long_desc_flag);
return 0;
}
@ -65,14 +68,16 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
strcmp(argv[i], "hwcache") == 0)
print_hwcache_events(NULL, raw_dump);
else if (strcmp(argv[i], "pmu") == 0)
print_pmu_events(NULL, raw_dump, !desc_flag);
print_pmu_events(NULL, raw_dump, !desc_flag,
long_desc_flag);
else if (strcmp(argv[i], "sdt") == 0)
print_sdt_events(NULL, NULL, raw_dump);
else if ((sep = strchr(argv[i], ':')) != NULL) {
int sep_idx;
if (sep == NULL) {
print_events(argv[i], raw_dump, !desc_flag);
print_events(argv[i], raw_dump, !desc_flag,
long_desc_flag);
continue;
}
sep_idx = sep - argv[i];
@ -94,7 +99,8 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
print_symbol_events(s, PERF_TYPE_SOFTWARE,
event_symbols_sw, PERF_COUNT_SW_MAX, raw_dump);
print_hwcache_events(s, raw_dump);
print_pmu_events(s, raw_dump, !desc_flag);
print_pmu_events(s, raw_dump, !desc_flag,
long_desc_flag);
print_tracepoint_events(NULL, s, raw_dump);
print_sdt_events(NULL, s, raw_dump);
free(s);

5
tools/perf/util/parse-events.c
View File

@ -2263,7 +2263,8 @@ out_enomem:
/*
* Print the help text for the event symbols:
*/
void print_events(const char *event_glob, bool name_only, bool quiet_flag)
void print_events(const char *event_glob, bool name_only, bool quiet_flag,
bool long_desc)
{
print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
@ -2273,7 +2274,7 @@ 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);
print_pmu_events(event_glob, name_only, quiet_flag, long_desc);
if (event_glob != NULL)
return;

3
tools/perf/util/parse-events.h
View File

@ -172,7 +172,8 @@ void parse_events_update_lists(struct list_head *list_event,
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);
void print_events(const char *event_glob, bool name_only, bool quiet,
bool long_desc);
struct event_symbol {
const char *symbol;

15
tools/perf/util/pmu.c
View File

@ -223,7 +223,7 @@ 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 *desc, char *val, char *long_desc)
{
struct perf_pmu_alias *alias;
int ret;
@ -257,6 +257,8 @@ static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name,
}
alias->desc = desc ? strdup(desc) : NULL;
alias->long_desc = long_desc ? strdup(long_desc) :
desc ? strdup(desc) : NULL;
list_add_tail(&alias->list, list);
@ -274,7 +276,7 @@ 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);
return __perf_pmu__new_alias(list, dir, name, NULL, buf, NULL);
}
static inline bool pmu_alias_info_file(char *name)
@ -532,7 +534,8 @@ 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->desc, (char *)pe->event,
(char *)pe->long_desc);
}
out:
@ -1090,7 +1093,8 @@ 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)
void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag,
bool long_desc)
{
struct perf_pmu *pmu;
struct perf_pmu_alias *alias;
@ -1138,7 +1142,8 @@ void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag)
if (!aliases[j].name)
goto out_enomem;
aliases[j].desc = alias->desc;
aliases[j].desc = long_desc ? alias->long_desc :
alias->desc;
j++;
}
if (pmu->selectable &&

4
tools/perf/util/pmu.h
View File

@ -41,6 +41,7 @@ struct perf_pmu_info {
struct perf_pmu_alias {
char *name;
char *desc;
char *long_desc;
struct list_head terms; /* HEAD struct parse_events_term -> list */
struct list_head list; /* ELEM */
char unit[UNIT_MAX_LEN+1];
@ -72,7 +73,8 @@ 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);
void print_pmu_events(const char *event_glob, bool name_only, bool quiet,
bool long_desc);
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,