| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Mon, 29 Mar 2021 15:00:31 +0800
From: Jin Yao <yao.jin@...ux.intel.com>
To: acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
mingo@...hat.com, alexander.shishkin@...ux.intel.com
Cc: Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
kan.liang@...el.com, yao.jin@...el.com,
Jin Yao <yao.jin@...ux.intel.com>
Subject: [PATCH v3 12/27] perf parse-events: Support no alias assigned event inside hybrid PMU
On hybrid platform, similar to hardware event, user may want
to enable other events only on one PMU. So following syntax
should be supported:
cpu_core/<event>/
cpu_atom/<event>/
But the syntax doesn't work for some events, such as cache
event.
Before:
# perf stat -e cpu_core/LLC-loads/ -a -- sleep 1
event syntax error: 'cpu_core/LLC-loads/'
\___ unknown term 'LLC-loads' for pmu 'cpu_core'
Cache events are much more complex than hardware events, so
we can't create aliases for them. We use another solution.
For example, if we use "cpu_core/LLC-loads/", in parse_events_add_pmu(),
term->config is "LLC-loads".
We create a new "parse_events_state" with the pmu_name and use
parse_events__scanner to scan the term->config ("LLC-loads" in
this example). The parse_events_add_cache() would be called during
parsing. The parse_state->pmu_name is used to identify the pmu
where the event should be enabled on.
After:
# ./perf stat -e cpu_core/LLC-loads/ -a -- sleep 1
Performance counter stats for 'system wide':
24,593 cpu_core/LLC-loads/
1.003911601 seconds time elapsed
Signed-off-by: Jin Yao <yao.jin@...ux.intel.com>
---
v3:
- Rename the patch:
'perf parse-events: Support hardware events inside PMU' -->
'perf parse-events: Support no alias assigned event inside hybrid PMU'
- Major code is moved to parse-events-hybrid.c.
- Refine the code.
tools/perf/util/parse-events-hybrid.c | 18 +++++-
tools/perf/util/parse-events-hybrid.h | 3 +-
tools/perf/util/parse-events.c | 80 +++++++++++++++++++++++++--
tools/perf/util/parse-events.h | 4 +-
tools/perf/util/parse-events.y | 9 ++-
tools/perf/util/pmu.c | 4 +-
tools/perf/util/pmu.h | 2 +-
7 files changed, 108 insertions(+), 12 deletions(-)
diff --git a/tools/perf/util/parse-events-hybrid.c b/tools/perf/util/parse-events-hybrid.c
index 8a630cbab8f3..5bf176b55573 100644
--- a/tools/perf/util/parse-events-hybrid.c
+++ b/tools/perf/util/parse-events-hybrid.c
@@ -64,6 +64,11 @@ static int add_hw_hybrid(struct parse_events_state *parse_state,
int ret;
perf_pmu__for_each_hybrid_pmu(pmu) {
+ if (parse_state->pmu_name &&
+ strcmp(parse_state->pmu_name, pmu->name)) {
+ continue;
+ }
+
ret = create_event_hybrid(PERF_TYPE_HARDWARE_PMU,
&parse_state->idx, list, attr, name,
config_terms, pmu);
@@ -100,6 +105,11 @@ static int add_raw_hybrid(struct parse_events_state *parse_state,
int ret;
perf_pmu__for_each_hybrid_pmu(pmu) {
+ if (parse_state->pmu_name &&
+ strcmp(parse_state->pmu_name, pmu->name)) {
+ continue;
+ }
+
ret = create_raw_event_hybrid(&parse_state->idx, list, attr,
name, config_terms, pmu);
if (ret)
@@ -137,7 +147,8 @@ int parse_events__add_numeric_hybrid(struct parse_events_state *parse_state,
int parse_events__add_cache_hybrid(struct list_head *list, int *idx,
struct perf_event_attr *attr, char *name,
struct list_head *config_terms,
- bool *hybrid)
+ bool *hybrid,
+ struct parse_events_state *parse_state)
{
struct perf_pmu *pmu;
int ret;
@@ -148,6 +159,11 @@ int parse_events__add_cache_hybrid(struct list_head *list, int *idx,
*hybrid = true;
perf_pmu__for_each_hybrid_pmu(pmu) {
+ if (parse_state->pmu_name &&
+ strcmp(parse_state->pmu_name, pmu->name)) {
+ continue;
+ }
+
ret = create_event_hybrid(PERF_TYPE_HW_CACHE_PMU, idx, list,
attr, name, config_terms, pmu);
if (ret)
diff --git a/tools/perf/util/parse-events-hybrid.h b/tools/perf/util/parse-events-hybrid.h
index 9ad33cd0cef4..f33bd67aa851 100644
--- a/tools/perf/util/parse-events-hybrid.h
+++ b/tools/perf/util/parse-events-hybrid.h
@@ -17,6 +17,7 @@ int parse_events__add_numeric_hybrid(struct parse_events_state *parse_state,
int parse_events__add_cache_hybrid(struct list_head *list, int *idx,
struct perf_event_attr *attr, char *name,
struct list_head *config_terms,
- bool *hybrid);
+ bool *hybrid,
+ struct parse_events_state *parse_state);
#endif /* __PERF_PARSE_EVENTS_HYBRID_H */
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 3692fa3c964a..020c785be742 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -38,6 +38,7 @@
#include "util/event.h"
#include "util/pfm.h"
#include "util/parse-events-hybrid.h"
+#include "util/pmu-hybrid.h"
#include "perf.h"
#define MAX_NAME_LEN 100
@@ -48,6 +49,9 @@ extern int parse_events_debug;
int parse_events_parse(void *parse_state, void *scanner);
static int get_config_terms(struct list_head *head_config,
struct list_head *head_terms __maybe_unused);
+static int parse_events__with_hybrid_pmu(struct parse_events_state *parse_state,
+ const char *str, char *pmu_name,
+ bool *found, struct list_head *list);
static struct perf_pmu_event_symbol *perf_pmu_events_list;
/*
@@ -450,7 +454,8 @@ static int config_attr(struct perf_event_attr *attr,
int parse_events_add_cache(struct list_head *list, int *idx,
char *type, char *op_result1, char *op_result2,
struct parse_events_error *err,
- struct list_head *head_config)
+ struct list_head *head_config,
+ struct parse_events_state *parse_state)
{
struct perf_event_attr attr;
LIST_HEAD(config_terms);
@@ -521,7 +526,7 @@ int parse_events_add_cache(struct list_head *list, int *idx,
i = parse_events__add_cache_hybrid(list, idx, &attr,
config_name ? : name, &config_terms,
- &hybrid);
+ &hybrid, parse_state);
if (hybrid)
return i;
@@ -1481,7 +1486,7 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
struct perf_pmu *pmu;
struct evsel *evsel;
struct parse_events_error *err = parse_state->error;
- bool use_uncore_alias;
+ bool use_uncore_alias, found = false;
LIST_HEAD(config_terms);
if (verbose > 1) {
@@ -1530,8 +1535,28 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
}
}
- if (!parse_state->fake_pmu && perf_pmu__check_alias(pmu, head_config, &info))
+ if (!parse_state->fake_pmu &&
+ perf_pmu__check_alias(pmu, head_config, &info, &found)) {
return -EINVAL;
+ }
+
+ if (!parse_state->fake_pmu && head_config && !found &&
+ perf_pmu__is_hybrid(name)) {
+ struct parse_events_term *term;
+ int ret;
+
+ list_for_each_entry(term, head_config, list) {
+ if (!term->config)
+ continue;
+
+ ret = parse_events__with_hybrid_pmu(parse_state,
+ term->config,
+ name, &found,
+ list);
+ if (found)
+ return ret;
+ }
+ }
if (verbose > 1) {
fprintf(stderr, "After aliases, add event pmu '%s' with '",
@@ -1605,6 +1630,15 @@ int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
struct perf_pmu *pmu = NULL;
int ok = 0;
+ if (parse_state->pmu_name) {
+ list = malloc(sizeof(struct list_head));
+ if (!list)
+ return -1;
+ INIT_LIST_HEAD(list);
+ *listp = list;
+ return 0;
+ }
+
*listp = NULL;
/* Add it for all PMUs that support the alias */
list = malloc(sizeof(struct list_head));
@@ -2176,6 +2210,44 @@ int parse_events_terms(struct list_head *terms, const char *str)
return ret;
}
+static int list_entries_nr(struct list_head *list)
+{
+ struct list_head *pos;
+ int n = 0;
+
+ list_for_each(pos, list)
+ n++;
+
+ return n;
+}
+
+static int parse_events__with_hybrid_pmu(struct parse_events_state *parse_state,
+ const char *str, char *pmu_name,
+ bool *found, struct list_head *list)
+{
+ struct parse_events_state ps = {
+ .list = LIST_HEAD_INIT(ps.list),
+ .stoken = PE_START_EVENTS,
+ .pmu_name = pmu_name,
+ .idx = parse_state->idx,
+ };
+ int ret;
+
+ *found = false;
+ ret = parse_events__scanner(str, &ps);
+ perf_pmu__parse_cleanup();
+
+ if (!ret) {
+ if (!list_empty(&ps.list)) {
+ *found = true;
+ list_splice(&ps.list, list);
+ parse_state->idx = list_entries_nr(list);
+ }
+ }
+
+ return ret;
+}
+
int __parse_events(struct evlist *evlist, const char *str,
struct parse_events_error *err, struct perf_pmu *fake_pmu)
{
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index c4f2f96304ce..f9d8e8e41c38 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -138,6 +138,7 @@ struct parse_events_state {
struct list_head *terms;
int stoken;
struct perf_pmu *fake_pmu;
+ char *pmu_name;
};
void parse_events__handle_error(struct parse_events_error *err, int idx,
@@ -188,7 +189,8 @@ int parse_events_add_tool(struct parse_events_state *parse_state,
int parse_events_add_cache(struct list_head *list, int *idx,
char *type, char *op_result1, char *op_result2,
struct parse_events_error *error,
- struct list_head *head_config);
+ struct list_head *head_config,
+ struct parse_events_state *parse_state);
int parse_events_add_breakpoint(struct list_head *list, int *idx,
u64 addr, char *type, u64 len);
int parse_events_add_pmu(struct parse_events_state *parse_state,
diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index d57ac86ce7ca..aba12a4d488e 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -454,7 +454,8 @@ PE_NAME_CACHE_TYPE '-' PE_NAME_CACHE_OP_RESULT '-' PE_NAME_CACHE_OP_RESULT opt_e
list = alloc_list();
ABORT_ON(!list);
- err = parse_events_add_cache(list, &parse_state->idx, $1, $3, $5, error, $6);
+ err = parse_events_add_cache(list, &parse_state->idx, $1, $3, $5, error, $6,
+ parse_state);
parse_events_terms__delete($6);
free($1);
free($3);
@@ -475,7 +476,8 @@ PE_NAME_CACHE_TYPE '-' PE_NAME_CACHE_OP_RESULT opt_event_config
list = alloc_list();
ABORT_ON(!list);
- err = parse_events_add_cache(list, &parse_state->idx, $1, $3, NULL, error, $4);
+ err = parse_events_add_cache(list, &parse_state->idx, $1, $3, NULL, error, $4,
+ parse_state);
parse_events_terms__delete($4);
free($1);
free($3);
@@ -495,7 +497,8 @@ PE_NAME_CACHE_TYPE opt_event_config
list = alloc_list();
ABORT_ON(!list);
- err = parse_events_add_cache(list, &parse_state->idx, $1, NULL, NULL, error, $2);
+ err = parse_events_add_cache(list, &parse_state->idx, $1, NULL, NULL, error, $2,
+ parse_state);
parse_events_terms__delete($2);
free($1);
if (err) {
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 72e5ae5e868e..7167ae88e0db 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -1412,7 +1412,7 @@ static int check_info_data(struct perf_pmu_alias *alias,
* defined for the alias
*/
int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
- struct perf_pmu_info *info)
+ struct perf_pmu_info *info, bool *found)
{
struct parse_events_term *term, *h;
struct perf_pmu_alias *alias;
@@ -1430,6 +1430,7 @@ int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
info->metric_expr = NULL;
info->metric_name = NULL;
+ *found = false;
list_for_each_entry_safe(term, h, head_terms, list) {
alias = pmu_find_alias(pmu, term);
if (!alias)
@@ -1438,6 +1439,7 @@ int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
if (ret)
return ret;
+ *found = true;
ret = check_info_data(alias, info);
if (ret)
return ret;
diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
index 5ed2abab7fe0..381a2e94fbba 100644
--- a/tools/perf/util/pmu.h
+++ b/tools/perf/util/pmu.h
@@ -91,7 +91,7 @@ int perf_pmu__config_terms(const char *pmu_name, struct list_head *formats,
__u64 perf_pmu__format_bits(struct list_head *formats, const char *name);
int perf_pmu__format_type(struct list_head *formats, const char *name);
int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
- struct perf_pmu_info *info);
+ struct perf_pmu_info *info, bool *found);
struct list_head *perf_pmu__alias(struct perf_pmu *pmu,
struct list_head *head_terms);
void perf_pmu_error(struct list_head *list, char *name, char const *msg);
--
2.17.1
Powered by blists - more mailing lists