[PATCH v3 1/4] perf: Add a 'percore' event qualifier

Jin Yao
2019-03-19T01:06:26Z

Add a 'percore' event qualifier, like cpu/event=0,umask=0x3,percore=1/,
that sums up the event counts for both hardware threads in a core.

We can already do this with --per-core, but it's often useful to do
this together with other metrics that are collected per hardware thread.
So we need to support this per-core counting on a event level.

This can be implemented in only the user tool, no kernel support needed.

v3:
---
Simplify the code according to Jiri's comments.
Before:
"return term->val.percore ? true : false;"
Now:
"return term->val.percore;"

v2:
---
Change the qualifier name from 'coresum' to 'percore' according to
comments from Jiri and Andi.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
---
tools/perf/util/evsel.c | 2 ++
tools/perf/util/evsel.h | 3 +++
tools/perf/util/parse-events.c | 27 +++++++++++++++++++++++++++
tools/perf/util/parse-events.h | 1 +
tools/perf/util/parse-events.l | 1 +
5 files changed, 34 insertions(+)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 3bbf73e..b900157 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -803,6 +803,8 @@ static void apply_config_terms(struct perf_evsel *evsel,
break;
case PERF_EVSEL__CONFIG_TERM_DRV_CFG:
break;
+ case PERF_EVSEL__CONFIG_TERM_PERCORE:
+ break;
default:
break;
}
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index cc578e0..fd86689 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -50,6 +50,7 @@ enum term_type {
PERF_EVSEL__CONFIG_TERM_OVERWRITE,
PERF_EVSEL__CONFIG_TERM_DRV_CFG,
PERF_EVSEL__CONFIG_TERM_BRANCH,
+ PERF_EVSEL__CONFIG_TERM_PERCORE,
};

struct perf_evsel_config_term {
@@ -67,6 +68,7 @@ struct perf_evsel_config_term {
bool overwrite;
char *branch;
unsigned long max_events;
+ bool percore;
} val;
bool weak;
};
@@ -150,6 +152,7 @@ struct perf_evsel {
struct perf_evsel **metric_events;
bool collect_stat;
bool weak_group;
+ bool percore;
const char *pmu_name;
};

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 4dcc01b..f77be35 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -930,6 +930,7 @@ static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
[PARSE_EVENTS__TERM_TYPE_OVERWRITE] = "overwrite",
[PARSE_EVENTS__TERM_TYPE_NOOVERWRITE] = "no-overwrite",
[PARSE_EVENTS__TERM_TYPE_DRV_CFG] = "driver-config",
+ [PARSE_EVENTS__TERM_TYPE_PERCORE] = "percore",
};

static bool config_term_shrinked;
@@ -950,6 +951,7 @@ config_term_avail(int term_type, struct parse_events_error *err)
case PARSE_EVENTS__TERM_TYPE_CONFIG2:
case PARSE_EVENTS__TERM_TYPE_NAME:
case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
+ case PARSE_EVENTS__TERM_TYPE_PERCORE:
return true;
default:
if (!err)
@@ -1041,6 +1043,14 @@ do { \
case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
CHECK_TYPE_VAL(NUM);
break;
+ case PARSE_EVENTS__TERM_TYPE_PERCORE:
+ CHECK_TYPE_VAL(NUM);
+ if ((unsigned int)term->val.num > 1) {
+ err->str = strdup("expected 0 or 1");
+ err->idx = term->err_val;
+ return -EINVAL;
+ }
+ break;
default:
err->str = strdup("unknown term");
err->idx = term->err_term;
@@ -1179,6 +1189,10 @@ do { \
case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
ADD_CONFIG_TERM(DRV_CFG, drv_cfg, term->val.str);
break;
+ case PARSE_EVENTS__TERM_TYPE_PERCORE:
+ ADD_CONFIG_TERM(PERCORE, percore,
+ term->val.num ? true : false);
+ break;
default:
break;
}
@@ -1233,6 +1247,18 @@ int parse_events_add_numeric(struct parse_events_state *parse_state,
get_config_name(head_config), &config_terms);
}

+static bool config_term_percore(struct list_head *config_terms)
+{
+ struct perf_evsel_config_term *term;
+
+ list_for_each_entry(term, config_terms, list) {
+ if (term->type == PERF_EVSEL__CONFIG_TERM_PERCORE)
+ return term->val.percore;
+ }
+
+ return false;
+}
+
int parse_events_add_pmu(struct parse_events_state *parse_state,
struct list_head *list, char *name,
struct list_head *head_config,
@@ -1305,6 +1331,7 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
evsel->metric_name = info.metric_name;
evsel->pmu_name = name;
evsel->use_uncore_alias = use_uncore_alias;
+ evsel->percore = config_term_percore(&evsel->config_terms);
}

return evsel ? 0 : -ENOMEM;
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index 5ed035c..ad4fbf3 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -75,6 +75,7 @@ enum {
PARSE_EVENTS__TERM_TYPE_NOOVERWRITE,
PARSE_EVENTS__TERM_TYPE_OVERWRITE,
PARSE_EVENTS__TERM_TYPE_DRV_CFG,
+ PARSE_EVENTS__TERM_TYPE_PERCORE,
__PARSE_EVENTS__TERM_TYPE_NR,
};

diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l
index 7805c71..7e9f8dc 100644
--- a/tools/perf/util/parse-events.l
+++ b/tools/perf/util/parse-events.l
@@ -274,6 +274,7 @@ inherit { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_INHERIT); }
no-inherit { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOINHERIT); }
overwrite { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_OVERWRITE); }
no-overwrite { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOOVERWRITE); }
+percore { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_PERCORE); }
, { return ','; }
"/" { BEGIN(INITIAL); return '/'; }
{name_minus} { return str(yyscanner, PE_NAME); }
--
2.7.4