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Subject[PATCH 09/13] perf, tools: Support MetricExpr header in JSON event list
Date
From: Andi Kleen <ak@linux.intel.com>

Add support for parsing the MetricExpr header in the JSON event lists and
storing them in the alias structure.

Used in the next patch.

v2: Change DividedBy to MetricExpr
v3: Really catch all uses of DividedBy
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
tools/perf/pmu-events/jevents.c | 18 ++++++++++++++----
tools/perf/pmu-events/jevents.h | 2 +-
tools/perf/pmu-events/pmu-events.h | 1 +
tools/perf/util/pmu.c | 9 ++++++---
tools/perf/util/pmu.h | 1 +
5 files changed, 23 insertions(+), 8 deletions(-)

diff --git a/tools/perf/pmu-events/jevents.c b/tools/perf/pmu-events/jevents.c
index eed09346a72a..0735dc2a167a 100644
--- a/tools/perf/pmu-events/jevents.c
+++ b/tools/perf/pmu-events/jevents.c
@@ -291,7 +291,8 @@ static void print_events_table_prefix(FILE *fp, const char *tblname)

static int print_events_table_entry(void *data, char *name, char *event,
char *desc, char *long_desc,
- char *pmu, char *unit, char *perpkg)
+ char *pmu, char *unit, char *perpkg,
+ char *metric_expr)
{
struct perf_entry_data *pd = data;
FILE *outfp = pd->outfp;
@@ -315,6 +316,8 @@ static int print_events_table_entry(void *data, char *name, char *event,
fprintf(outfp, "\t.unit = \"%s\",\n", unit);
if (perpkg)
fprintf(outfp, "\t.perpkg = \"%s\",\n", perpkg);
+ if (metric_expr)
+ fprintf(outfp, "\t.metric_expr = \"%s\",\n", metric_expr);
fprintf(outfp, "},\n");

return 0;
@@ -362,7 +365,8 @@ static char *real_event(const char *name, char *event)
int json_events(const char *fn,
int (*func)(void *data, char *name, char *event, char *desc,
char *long_desc,
- char *pmu, char *unit, char *perpkg),
+ char *pmu, char *unit, char *perpkg,
+ char *metric_expr),
void *data)
{
int err = -EIO;
@@ -388,6 +392,7 @@ int json_events(const char *fn,
char *filter = NULL;
char *perpkg = NULL;
char *unit = NULL;
+ char *metric_expr = NULL;
unsigned long long eventcode = 0;
struct msrmap *msr = NULL;
jsmntok_t *msrval = NULL;
@@ -398,6 +403,7 @@ int json_events(const char *fn,
for (j = 0; j < obj->size; j += 2) {
jsmntok_t *field, *val;
int nz;
+ char *s;

field = tok + j;
EXPECT(field->type == JSMN_STRING, tok + j,
@@ -444,7 +450,6 @@ int json_events(const char *fn,
NULL);
} else if (json_streq(map, field, "Unit")) {
const char *ppmu;
- char *s;

ppmu = field_to_perf(unit_to_pmu, map, val);
if (ppmu) {
@@ -464,6 +469,10 @@ int json_events(const char *fn,
addfield(map, &unit, "", "", val);
} else if (json_streq(map, field, "PerPkg")) {
addfield(map, &perpkg, "", "", val);
+ } else if (json_streq(map, field, "MetricExpr")) {
+ addfield(map, &metric_expr, "", "", val);
+ for (s = metric_expr; *s; s++)
+ *s = tolower(*s);
}
/* ignore unknown fields */
}
@@ -488,7 +497,7 @@ int json_events(const char *fn,
fixname(name);

err = func(data, name, real_event(name, event), desc, long_desc,
- pmu, unit, perpkg);
+ pmu, unit, perpkg, metric_expr);
free(event);
free(desc);
free(name);
@@ -498,6 +507,7 @@ int json_events(const char *fn,
free(filter);
free(perpkg);
free(unit);
+ free(metric_expr);
if (err)
break;
tok += j;
diff --git a/tools/perf/pmu-events/jevents.h b/tools/perf/pmu-events/jevents.h
index 71e13de31092..57e111bf2168 100644
--- a/tools/perf/pmu-events/jevents.h
+++ b/tools/perf/pmu-events/jevents.h
@@ -5,7 +5,7 @@ int json_events(const char *fn,
int (*func)(void *data, char *name, char *event, char *desc,
char *long_desc,
char *pmu,
- char *unit, char *perpkg),
+ char *unit, char *perpkg, char *metric_expr),
void *data);
char *get_cpu_str(void);

diff --git a/tools/perf/pmu-events/pmu-events.h b/tools/perf/pmu-events/pmu-events.h
index c669a3cdb9f0..d046e3a4ce46 100644
--- a/tools/perf/pmu-events/pmu-events.h
+++ b/tools/perf/pmu-events/pmu-events.h
@@ -13,6 +13,7 @@ struct pmu_event {
const char *pmu;
const char *unit;
const char *perpkg;
+ const char *metric_expr;
};

/*
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 12f84dd2ac5d..c0d487b3b925 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -231,7 +231,8 @@ 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 *unit, char *perpkg)
+ char *unit, char *perpkg,
+ char *metric_expr)
{
struct perf_pmu_alias *alias;
int ret;
@@ -265,6 +266,7 @@ static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name,
perf_pmu__parse_snapshot(alias, dir, name);
}

+ alias->metric_expr = metric_expr ? strdup(metric_expr) : NULL;
alias->desc = desc ? strdup(desc) : NULL;
alias->long_desc = long_desc ? strdup(long_desc) :
desc ? strdup(desc) : NULL;
@@ -294,7 +296,7 @@ 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, NULL,
- NULL);
+ NULL, NULL);
}

static inline bool pmu_alias_info_file(char *name)
@@ -564,7 +566,8 @@ static void pmu_add_cpu_aliases(struct list_head *head, const char *name)
__perf_pmu__new_alias(head, NULL, (char *)pe->name,
(char *)pe->desc, (char *)pe->event,
(char *)pe->long_desc, (char *)pe->topic,
- (char *)pe->unit, (char *)pe->perpkg);
+ (char *)pe->unit, (char *)pe->perpkg,
+ (char *)pe->metric_expr);
}

out:
diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
index 00852ddc7741..3dccb15f29e9 100644
--- a/tools/perf/util/pmu.h
+++ b/tools/perf/util/pmu.h
@@ -50,6 +50,7 @@ struct perf_pmu_alias {
double scale;
bool per_pkg;
bool snapshot;
+ char *metric_expr;
};

struct perf_pmu *perf_pmu__find(const char *name);
--
2.9.3
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