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perf list: Support long jevents descriptions

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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
Download Patch File Download Diff File Expand all files Collapse all files

15
tools/perf/util/pmu.c
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@@ -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 &&