[PATCH 39/49] perf parse-events: Support hybrid raw events
From: kan . liang
Date: Mon Feb 08 2021 - 13:08:31 EST
From: Jin Yao <yao.jin@xxxxxxxxxxxxxxx>
On hybrid platform, same raw event is possible to be available on
both cpu_core pmu and cpu_atom pmu. So it's supported to create
two raw events for one event encoding.
root@otcpl-adl-s-2:~# ./perf stat -e r3c -a -vv -- sleep 1
Control descriptor is not initialized
------------------------------------------------------------
perf_event_attr:
type 4
size 120
config 0x3c
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
exclude_guest 1
------------------------------------------------------------
sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 3
sys_perf_event_open: pid -1 cpu 1 group_fd -1 flags 0x8 = 4
sys_perf_event_open: pid -1 cpu 2 group_fd -1 flags 0x8 = 5
sys_perf_event_open: pid -1 cpu 3 group_fd -1 flags 0x8 = 7
sys_perf_event_open: pid -1 cpu 4 group_fd -1 flags 0x8 = 8
sys_perf_event_open: pid -1 cpu 5 group_fd -1 flags 0x8 = 9
sys_perf_event_open: pid -1 cpu 6 group_fd -1 flags 0x8 = 10
sys_perf_event_open: pid -1 cpu 7 group_fd -1 flags 0x8 = 11
sys_perf_event_open: pid -1 cpu 8 group_fd -1 flags 0x8 = 12
sys_perf_event_open: pid -1 cpu 9 group_fd -1 flags 0x8 = 13
sys_perf_event_open: pid -1 cpu 10 group_fd -1 flags 0x8 = 14
sys_perf_event_open: pid -1 cpu 11 group_fd -1 flags 0x8 = 15
sys_perf_event_open: pid -1 cpu 12 group_fd -1 flags 0x8 = 16
sys_perf_event_open: pid -1 cpu 13 group_fd -1 flags 0x8 = 17
sys_perf_event_open: pid -1 cpu 14 group_fd -1 flags 0x8 = 18
sys_perf_event_open: pid -1 cpu 15 group_fd -1 flags 0x8 = 19
------------------------------------------------------------
perf_event_attr:
type 10
size 120
config 0x3c
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
exclude_guest 1
------------------------------------------------------------
sys_perf_event_open: pid -1 cpu 16 group_fd -1 flags 0x8 = 20
sys_perf_event_open: pid -1 cpu 17 group_fd -1 flags 0x8 = 21
sys_perf_event_open: pid -1 cpu 18 group_fd -1 flags 0x8 = 22
sys_perf_event_open: pid -1 cpu 19 group_fd -1 flags 0x8 = 23
sys_perf_event_open: pid -1 cpu 20 group_fd -1 flags 0x8 = 24
sys_perf_event_open: pid -1 cpu 21 group_fd -1 flags 0x8 = 25
sys_perf_event_open: pid -1 cpu 22 group_fd -1 flags 0x8 = 26
sys_perf_event_open: pid -1 cpu 23 group_fd -1 flags 0x8 = 27
...
Performance counter stats for 'system wide':
13,107,070 r3c
316,562 r3c
1.002161379 seconds time elapsed
It also supports the raw event inside pmu. Syntax is similar:
cpu_core/<raw event>/
cpu_atom/<raw event>/
root@otcpl-adl-s-2:~# ./perf stat -e cpu_core/r3c/ -vv -- ./triad_loop
Control descriptor is not initialized
------------------------------------------------------------
perf_event_attr:
type 4
size 120
config 0x3c
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
enable_on_exec 1
exclude_guest 1
------------------------------------------------------------
sys_perf_event_open: pid 23641 cpu -1 group_fd -1 flags 0x8 = 3
cpu_core/r3c/: 0: 401407363 102724005 102724005
cpu_core/r3c/: 401407363 102724005 102724005
Performance counter stats for './triad_loop':
401,407,363 cpu_core/r3c/
0.103186241 seconds time elapsed
Reviewed-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Signed-off-by: Jin Yao <yao.jin@xxxxxxxxxxxxxxx>
---
tools/perf/util/parse-events.c | 56 +++++++++++++++++++++++++++++++++++++++++-
1 file changed, 55 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index ddf6f79..6d7a2ce 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1532,6 +1532,55 @@ static int add_hybrid_numeric(struct parse_events_state *parse_state,
return 0;
}
+static int create_hybrid_raw_event(struct parse_events_state *parse_state,
+ struct list_head *list,
+ struct perf_event_attr *attr,
+ struct list_head *head_config,
+ struct list_head *config_terms,
+ struct perf_pmu *pmu)
+{
+ struct evsel *evsel;
+
+ attr->type = pmu->type;
+ evsel = __add_event(list, &parse_state->idx, attr, true,
+ get_config_name(head_config),
+ pmu, config_terms, false, NULL);
+ if (evsel)
+ evsel->pmu_name = strdup(pmu->name);
+ else
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int add_hybrid_raw(struct parse_events_state *parse_state,
+ struct list_head *list,
+ struct perf_event_attr *attr,
+ struct list_head *head_config,
+ struct list_head *config_terms,
+ bool *hybrid)
+{
+ struct perf_pmu *pmu;
+ int ret;
+
+ *hybrid = false;
+ perf_pmu__for_each_hybrid_pmus(pmu) {
+ *hybrid = true;
+ if (parse_state->pmu_name &&
+ strcmp(parse_state->pmu_name, pmu->name)) {
+ continue;
+ }
+
+ ret = create_hybrid_raw_event(parse_state, list, attr,
+ head_config, config_terms,
+ pmu);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
int parse_events_add_numeric(struct parse_events_state *parse_state,
struct list_head *list,
u32 type, u64 config,
@@ -1558,7 +1607,12 @@ int parse_events_add_numeric(struct parse_events_state *parse_state,
/*
* Skip the software dummy event.
*/
- if (type != PERF_TYPE_SOFTWARE) {
+ if (type == PERF_TYPE_RAW) {
+ ret = add_hybrid_raw(parse_state, list, &attr, head_config,
+ &config_terms, &hybrid);
+ if (hybrid)
+ return ret;
+ } else if (type != PERF_TYPE_SOFTWARE) {
if (!perf_pmu__hybrid_exist())
perf_pmu__scan(NULL);
--
2.7.4