[PATCH 05/10] perf, tools: Add debug support for outputing alias string

Andi Kleen
2017-01-28T02:17:08Z

From: Andi Kleen <ak@linux.intel.com>

For debugging and testing it is useful to see the converted
alias string. Add support to perf stat/record and perf list to print
the alias conversion. The text string is saved in the alias structure.
For perf stat/record it is folded into the normal -v. For perf list
-v was taken, so we use --debug.

Before:

% perf list
...
cache:
l1d.replacement
[L1D data line replacements]
l1d_pend_miss.fb_full
[Cycles a demand request was blocked due to Fill Buffers inavailability]

After

% perf list --debug
...
cache:
l1d.replacement
[L1D data line replacements]
cpu/umask=0x1,period=2000003,event=0x51/
l1d_pend_miss.fb_full
[Cycles a demand request was blocked due to Fill Buffers inavailability]
cpu/umask=0x2,period=2000003,cmask=1,event=0x48/

Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
tools/perf/builtin-list.c | 3 +++
tools/perf/util/parse-events.y | 3 +++
tools/perf/util/pmu.c | 8 ++++++++
tools/perf/util/pmu.h | 1 +
4 files changed, 15 insertions(+)

diff --git a/tools/perf/builtin-list.c b/tools/perf/builtin-list.c
index ba9322ff858b..3b9d98b5feef 100644
--- a/tools/perf/builtin-list.c
+++ b/tools/perf/builtin-list.c
@@ -14,6 +14,7 @@
#include "util/parse-events.h"
#include "util/cache.h"
#include "util/pmu.h"
+#include "util/debug.h"
#include <subcmd/parse-options.h>

static bool desc_flag = true;
@@ -29,6 +30,8 @@ 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_INCR(0, "debug", &verbose,
+ "Enable debugging output"),
OPT_END()
};
const char * const list_usage[] = {
diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index f3b5ec901600..3a5196380609 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -13,6 +13,7 @@
#include <linux/types.h>
#include "util.h"
#include "pmu.h"
+#include "debug.h"
#include "parse-events.h"
#include "parse-events-bison.h"

@@ -254,6 +255,8 @@ PE_KERNEL_PMU_EVENT sep_dc

if (!parse_events_add_pmu(data, list,
pmu->name, head)) {
+ pr_debug("%s -> %s/%s/\n", $1,
+ pmu->name, alias->str);
ok++;
}

diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 8e9d00fd418e..82a654dec666 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -275,6 +275,8 @@ static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name,
snprintf(alias->unit, sizeof(alias->unit), "%s", unit);
}
alias->per_pkg = perpkg && sscanf(perpkg, "%d", &num) == 1 && num == 1;
+ alias->str = strdup(val);
+
list_add_tail(&alias->list, list);

return 0;
@@ -1087,6 +1089,8 @@ struct sevent {
char *name;
char *desc;
char *topic;
+ char *str;
+ char *pmu;
};

static int cmp_sevent(const void *a, const void *b)
@@ -1183,6 +1187,8 @@ void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag,
aliases[j].desc = long_desc ? alias->long_desc :
alias->desc;
aliases[j].topic = alias->topic;
+ aliases[j].str = alias->str;
+ aliases[j].pmu = pmu->name;
j++;
}
if (pmu->selectable &&
@@ -1217,6 +1223,8 @@ 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)
+ printf("%*s%s/%s/\n", 8, "", aliases[j].pmu, aliases[j].str);
} else
printf(" %-50s [Kernel PMU event]\n", aliases[j].name);
printed++;
diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
index 25712034c815..00852ddc7741 100644
--- a/tools/perf/util/pmu.h
+++ b/tools/perf/util/pmu.h
@@ -43,6 +43,7 @@ struct perf_pmu_alias {
char *desc;
char *long_desc;
char *topic;
+ char *str;
struct list_head terms; /* HEAD struct parse_events_term -> list */
struct list_head list; /* ELEM */
char unit[UNIT_MAX_LEN+1];
--
2.9.3