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kernel/patches/0208-perf-tools-Add-fake-pmu-support.patch
hongrongxuan a7fbfa09c7 Perf tool: perf tool add Hip09 json support
2023-11-10 14:47:39 +08:00

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From cfab54eab73c970afecf43fe5e2126e20caaf27a Mon Sep 17 00:00:00 2001
From: Jiri Olsa <jolsa@kernel.org>
Date: Tue, 2 Jun 2020 23:47:29 +0200
Subject: [PATCH 091/201] perf tools: Add fake pmu support
mainline inclusion
from mainline-v5.9-rc1
commit 387ad33fe710758a8e1b860819a7452bceb4329a
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8C0CX
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=387ad33fe710758a8e1b860819a7452bceb4329a
----------------------------------------------------------------------
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>
Signed-off-by: hongrongxuan <hongrongxuan@huawei.com>
Conflicts:
tools/perf/util/parse-events.c
tools/perf/util/parse-events.h
---
tools/perf/util/parse-events.c | 6 ++---
tools/perf/util/parse-events.h | 1 +
tools/perf/util/parse-events.l | 8 +++++--
tools/perf/util/parse-events.y | 41 ++++++++++++++++++++++++++++++++--
4 files changed, 49 insertions(+), 7 deletions(-)
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 328d133933bf..f3fe4ed4a9ea 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1266,7 +1266,7 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
bool use_uncore_alias;
LIST_HEAD(config_terms);
- pmu = perf_pmu__find(name);
+ pmu = parse_state->fake_pmu ?: perf_pmu__find(name);
if (!pmu) {
if (asprintf(&err->str,
"Cannot find PMU `%s'. Missing kernel support?",
@@ -1297,7 +1297,7 @@ 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;
/*
@@ -1310,7 +1310,7 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
if (get_config_terms(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 perf_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 28af56c9939f..c78809837f29 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -120,6 +120,7 @@ struct parse_events_state {
struct perf_evlist *evlist;
struct list_head *terms;
int stoken;
+ struct perf_pmu *fake_pmu;
};
void parse_events__shrink_config_terms(void);
diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l
index 1ff9f8805410..83ccfea42e9b 100644
--- a/tools/perf/util/parse-events.l
+++ b/tools/perf/util/parse-events.l
@@ -132,12 +132,16 @@ 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;
@@ -372,7 +376,7 @@ 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 ff913778a7d4..f03da974770c 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -59,7 +59,7 @@ 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
@@ -76,7 +76,7 @@ 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
%type <num> value_sym
%type <head> event_config
@@ -301,6 +301,43 @@ 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
--
2.27.0
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