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authorJiri Olsa <jolsa@kernel.org>2020-06-02 23:47:29 +0200
committerArnaldo Carvalho de Melo <acme@redhat.com>2020-06-22 21:28:08 +0200
commit387ad33fe710758a8e1b860819a7452bceb4329a (patch)
tree828d4602012381d3408f3f6308cff02c3471109a /tools/perf/util
parentperf annotate: Remove unneeded conversion to bool (diff)
downloadlinux-387ad33fe710758a8e1b860819a7452bceb4329a.tar.xz
linux-387ad33fe710758a8e1b860819a7452bceb4329a.zip
perf tools: Add fake pmu support
Add a way to create a pmu event without the actual PMU being in place. This way we can test metrics defined for any processor. The interface is to define fake_pmu in struct parse_events_state data. It will be used only in tests via special interface function added in following changes. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Acked-by: Ian Rogers <irogers@google.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lore.kernel.org/lkml/20200602214741.1218986-2-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util')
-rw-r--r--tools/perf/util/parse-events.c6
-rw-r--r--tools/perf/util/parse-events.h3
-rw-r--r--tools/perf/util/parse-events.l8
-rw-r--r--tools/perf/util/parse-events.y41
4 files changed, 50 insertions, 8 deletions
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 3decbb203846..4eb7bd53d048 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1450,7 +1450,7 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
fprintf(stderr, "' that may result in non-fatal errors\n");
}
- pmu = perf_pmu__find(name);
+ pmu = parse_state->fake_pmu ?: perf_pmu__find(name);
if (!pmu) {
char *err_str;
@@ -1483,7 +1483,7 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
}
}
- if (perf_pmu__check_alias(pmu, head_config, &info))
+ if (!parse_state->fake_pmu && perf_pmu__check_alias(pmu, head_config, &info))
return -EINVAL;
if (verbose > 1) {
@@ -1516,7 +1516,7 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
if (pmu->default_config && get_config_chgs(pmu, head_config, &config_terms))
return -ENOMEM;
- if (perf_pmu__config(pmu, &attr, head_config, parse_state->error)) {
+ if (!parse_state->fake_pmu && perf_pmu__config(pmu, &attr, head_config, parse_state->error)) {
struct evsel_config_term *pos, *tmp;
list_for_each_entry_safe(pos, tmp, &config_terms, list) {
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index 1fe23a2f9b36..bf79e1eac7d9 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -127,9 +127,10 @@ struct parse_events_state {
int idx;
int nr_groups;
struct parse_events_error *error;
- struct evlist *evlist;
+ struct evlist *evlist;
struct list_head *terms;
int stoken;
+ struct perf_pmu *fake_pmu;
};
void parse_events__handle_error(struct parse_events_error *err, int idx,
diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l
index 002802e17059..56912c9641f5 100644
--- a/tools/perf/util/parse-events.l
+++ b/tools/perf/util/parse-events.l
@@ -129,12 +129,16 @@ do { \
yyless(0); \
} while (0)
-static int pmu_str_check(yyscan_t scanner)
+static int pmu_str_check(yyscan_t scanner, struct parse_events_state *parse_state)
{
YYSTYPE *yylval = parse_events_get_lval(scanner);
char *text = parse_events_get_text(scanner);
yylval->str = strdup(text);
+
+ if (parse_state->fake_pmu)
+ return PE_PMU_EVENT_FAKE;
+
switch (perf_pmu__parse_check(text)) {
case PMU_EVENT_SYMBOL_PREFIX:
return PE_PMU_EVENT_PRE;
@@ -376,7 +380,7 @@ r{num_raw_hex} { return raw(yyscanner); }
{modifier_event} { return str(yyscanner, PE_MODIFIER_EVENT); }
{bpf_object} { if (!isbpf(yyscanner)) { USER_REJECT }; return str(yyscanner, PE_BPF_OBJECT); }
{bpf_source} { if (!isbpf(yyscanner)) { USER_REJECT }; return str(yyscanner, PE_BPF_SOURCE); }
-{name} { return pmu_str_check(yyscanner); }
+{name} { return pmu_str_check(yyscanner, _parse_state); }
{name_tag} { return str(yyscanner, PE_NAME); }
"/" { BEGIN(config); return '/'; }
- { return '-'; }
diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index acef87d9af58..b9fb91fdc5de 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -69,7 +69,7 @@ static void inc_group_count(struct list_head *list,
%token PE_NAME_CACHE_TYPE PE_NAME_CACHE_OP_RESULT
%token PE_PREFIX_MEM PE_PREFIX_RAW PE_PREFIX_GROUP
%token PE_ERROR
-%token PE_PMU_EVENT_PRE PE_PMU_EVENT_SUF PE_KERNEL_PMU_EVENT
+%token PE_PMU_EVENT_PRE PE_PMU_EVENT_SUF PE_KERNEL_PMU_EVENT PE_PMU_EVENT_FAKE
%token PE_ARRAY_ALL PE_ARRAY_RANGE
%token PE_DRV_CFG_TERM
%type <num> PE_VALUE
@@ -87,7 +87,7 @@ static void inc_group_count(struct list_head *list,
%type <str> PE_MODIFIER_EVENT
%type <str> PE_MODIFIER_BP
%type <str> PE_EVENT_NAME
-%type <str> PE_PMU_EVENT_PRE PE_PMU_EVENT_SUF PE_KERNEL_PMU_EVENT
+%type <str> PE_PMU_EVENT_PRE PE_PMU_EVENT_SUF PE_KERNEL_PMU_EVENT PE_PMU_EVENT_FAKE
%type <str> PE_DRV_CFG_TERM
%destructor { free ($$); } <str>
%type <term> event_term
@@ -356,6 +356,43 @@ PE_PMU_EVENT_PRE '-' PE_PMU_EVENT_SUF sep_dc
YYABORT;
$$ = list;
}
+|
+PE_PMU_EVENT_FAKE sep_dc
+{
+ struct list_head *list;
+ int err;
+
+ list = alloc_list();
+ if (!list)
+ YYABORT;
+
+ err = parse_events_add_pmu(_parse_state, list, $1, NULL, false, false);
+ free($1);
+ if (err < 0) {
+ free(list);
+ YYABORT;
+ }
+ $$ = list;
+}
+|
+PE_PMU_EVENT_FAKE opt_pmu_config
+{
+ struct list_head *list;
+ int err;
+
+ list = alloc_list();
+ if (!list)
+ YYABORT;
+
+ err = parse_events_add_pmu(_parse_state, list, $1, $2, false, false);
+ free($1);
+ parse_events_terms__delete($2);
+ if (err < 0) {
+ free(list);
+ YYABORT;
+ }
+ $$ = list;
+}
value_sym:
PE_VALUE_SYM_HW