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perf jevents: Add support for parsing uncore json files 

Handle the "Unit" field, which is needed to find the right PMU for an
event. We call it "pmu" and convert it to the perf pmu name with an
uncore prefix.

Handle the "ExtSel" field, which just extends the event mask with an
additional bit.

Handle the "Filter" field which adds parameters to the main event
to configure filtering.

Handle the "Unit" field which declares the unit the values should be
scaled too (similar to what the kernel exports)

Set up the "perpkg" field for uncore events so that perf knows they are
per package (similar to what the kernel exports)

Then output the fields into the pmu-events data structures which are
compiled into perf.

Filter out zero fields, except for the event itself.

v2: Fix compilation. Add uncore_ prefix at pre-processing time.
    Move eventcode change to separate patch.

v3: Remove extra __maybe_unused

v4: dont duplicate aliases for cpu pmu events

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20170128020345.19007-3-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Andi Kleen 2017-01-27 18:03:37 -08:00 committed by Arnaldo Carvalho de Melo
parent d581141970
commit fedb2b5182
4 changed files with 98 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

74
tools/perf/pmu-events/jevents.c
View File

@ -188,6 +188,27 @@ static struct msrmap *lookup_msr(char *map, jsmntok_t *val)
return NULL;
}
static struct map {
const char *json;
const char *perf;
} unit_to_pmu[] = {
{ "CBO", "uncore_cbox" },
{ "QPI LL", "uncore_qpi" },
{ "SBO", "uncore_sbox" },
{}
};
static const char *field_to_perf(struct map *table, char *map, jsmntok_t *val)
{
int i;
for (i = 0; table[i].json; i++) {
if (json_streq(map, val, table[i].json))
return table[i].perf;
}
return NULL;
}
#define EXPECT(e, t, m) do { if (!(e)) { \
jsmntok_t *loc = (t); \
if (!(t)->start && (t) > tokens) \
@ -269,7 +290,8 @@ 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 *desc, char *long_desc,
char *pmu, char *unit, char *perpkg)
{
struct perf_entry_data *pd = data;
FILE *outfp = pd->outfp;
@ -287,7 +309,12 @@ static int print_events_table_entry(void *data, char *name, char *event,
fprintf(outfp, "\t.topic = \"%s\",\n", topic);
if (long_desc && long_desc[0])
fprintf(outfp, "\t.long_desc = \"%s\",\n", long_desc);
if (pmu)
fprintf(outfp, "\t.pmu = \"%s\",\n", pmu);
if (unit)
fprintf(outfp, "\t.unit = \"%s\",\n", unit);
if (perpkg)
fprintf(outfp, "\t.perpkg = \"%s\",\n", perpkg);
fprintf(outfp, "},\n");
return 0;
@ -334,7 +361,8 @@ static char *real_event(const char *name, char *event)
/* Call func with each event in the json file */
int json_events(const char *fn,
int (*func)(void *data, char *name, char *event, char *desc,
char *long_desc),
char *long_desc,
char *pmu, char *unit, char *perpkg),
void *data)
{
int err = -EIO;
@ -356,6 +384,10 @@ int json_events(const char *fn,
char *event = NULL, *desc = NULL, *name = NULL;
char *long_desc = NULL;
char *extra_desc = NULL;
char *pmu = NULL;
char *filter = NULL;
char *perpkg = NULL;
char *unit = NULL;
unsigned long long eventcode = 0;
struct msrmap *msr = NULL;
jsmntok_t *msrval = NULL;
@ -382,6 +414,11 @@ int json_events(const char *fn,
addfield(map, &code, "", "", val);
eventcode |= strtoul(code, NULL, 0);
free(code);
} else if (json_streq(map, field, "ExtSel")) {
char *code = NULL;
addfield(map, &code, "", "", val);
eventcode |= strtoul(code, NULL, 0) << 21;
free(code);
} else if (json_streq(map, field, "EventName")) {
addfield(map, &name, "", "", val);
} else if (json_streq(map, field, "BriefDescription")) {
@ -405,6 +442,28 @@ int json_events(const char *fn,
addfield(map, &extra_desc, ". ",
" Supports address when precise",
NULL);
} else if (json_streq(map, field, "Unit")) {
const char *ppmu;
char *s;
ppmu = field_to_perf(unit_to_pmu, map, val);
if (ppmu) {
pmu = strdup(ppmu);
} else {
if (!pmu)
pmu = strdup("uncore_");
addfield(map, &pmu, "", "", val);
for (s = pmu; *s; s++)
*s = tolower(*s);
}
addfield(map, &desc, ". ", "Unit: ", NULL);
addfield(map, &desc, "", pmu, NULL);
} else if (json_streq(map, field, "Filter")) {
addfield(map, &filter, "", "", val);
} else if (json_streq(map, field, "ScaleUnit")) {
addfield(map, &unit, "", "", val);
} else if (json_streq(map, field, "PerPkg")) {
addfield(map, &perpkg, "", "", val);
}
/* ignore unknown fields */
}
@ -422,16 +481,23 @@ int json_events(const char *fn,
addfield(map, &desc, " ", extra_desc, NULL);
if (long_desc && extra_desc)
addfield(map, &long_desc, " ", extra_desc, NULL);
if (filter)
addfield(map, &event, ",", filter, NULL);
if (msr != NULL)
addfield(map, &event, ",", msr->pname, msrval);
fixname(name);
err = func(data, name, real_event(name, event), desc, long_desc);
err = func(data, name, real_event(name, event), desc, long_desc,
pmu, unit, perpkg);
free(event);
free(desc);
free(name);
free(long_desc);
free(extra_desc);
free(pmu);
free(filter);
free(perpkg);
free(unit);
if (err)
break;
tok += j;

4
tools/perf/pmu-events/jevents.h
View File

@ -3,7 +3,9 @@
int json_events(const char *fn,
int (*func)(void *data, char *name, char *event, char *desc,
char *long_desc),
char *long_desc,
char *pmu,
char *unit, char *perpkg),
void *data);
char *get_cpu_str(void);

3
tools/perf/pmu-events/pmu-events.h
View File

@ -10,6 +10,9 @@ struct pmu_event {
const char *desc;
const char *topic;
const char *long_desc;
const char *pmu;
const char *unit;
const char *perpkg;
};
/*

30
tools/perf/util/pmu.c
View File

@ -229,11 +229,13 @@ 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 *desc, char *val,
char *long_desc, char *topic,
char *unit, char *perpkg)
{
struct perf_pmu_alias *alias;
int ret;
int num;
alias = malloc(sizeof(*alias));
if (!alias)
@ -267,7 +269,12 @@ static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name,
alias->long_desc = long_desc ? strdup(long_desc) :
desc ? strdup(desc) : NULL;
alias->topic = topic ? strdup(topic) : NULL;
if (unit) {
if (convert_scale(unit, &unit, &alias->scale) < 0)
return -1;
snprintf(alias->unit, sizeof(alias->unit), "%s", unit);
}
alias->per_pkg = perpkg && sscanf(perpkg, "%d", &num) == 1 && num == 1;
list_add_tail(&alias->list, list);
return 0;
@ -284,7 +291,8 @@ 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, NULL,
NULL);
}
static inline bool pmu_alias_info_file(char *name)
@ -504,7 +512,7 @@ char * __weak get_cpuid_str(void)
* to the current running CPU. Then, add all PMU events from that table
* as aliases.
*/
static void pmu_add_cpu_aliases(struct list_head *head)
static void pmu_add_cpu_aliases(struct list_head *head, const char *name)
{
int i;
struct pmu_events_map *map;
@ -540,14 +548,21 @@ static void pmu_add_cpu_aliases(struct list_head *head)
*/
i = 0;
while (1) {
const char *pname;
pe = &map->table[i++];
if (!pe->name)
break;
pname = pe->pmu ? pe->pmu : "cpu";
if (strncmp(pname, name, strlen(pname)))
continue;
/* 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,
(char *)pe->unit, (char *)pe->perpkg);
}
out:
@ -578,8 +593,7 @@ static struct perf_pmu *pmu_lookup(const char *name)
if (pmu_aliases(name, &aliases))
return NULL;
if (!strcmp(name, "cpu"))
pmu_add_cpu_aliases(&aliases);
pmu_add_cpu_aliases(&aliases, name);
if (pmu_type(name, &type))
return NULL;