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From:   kan.liang@linux.intel.com
To:     peterz@infradead.org, acme@kernel.org, mingo@kernel.org,
        linux-kernel@vger.kernel.org
Cc:     tglx@linutronix.de, bp@alien8.de, namhyung@kernel.org,
        jolsa@redhat.com, ak@linux.intel.com, yao.jin@linux.intel.com,
        alexander.shishkin@linux.intel.com, adrian.hunter@intel.com
Subject: [PATCH 39/49] perf parse-events: Support hybrid raw events
Date:   Mon,  8 Feb 2021 07:25:36 -0800
Message-Id: <1612797946-18784-40-git-send-email-kan.liang@linux.intel.com>
In-Reply-To: <1612797946-18784-1-git-send-email-kan.liang@linux.intel.com>
References: <1612797946-18784-1-git-send-email-kan.liang@linux.intel.com>
Precedence: bulk

From: Jin Yao <yao.jin@linux.intel.com>

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@linux.intel.com>
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
---
 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