[PATCH v4 13/25] perf record: Create two hybrid 'cycles' events by default

Jin Yao
2021-04-16T14:07:37Z

When evlist is empty, for example no '-e' specified in perf record,
one default 'cycles' event is added to evlist.

While on hybrid platform, it needs to create two default 'cycles'
events. One is for cpu_core, the other is for cpu_atom.

This patch actually calls evsel__new_cycles() two times to create
two 'cycles' events.

# ./perf record -vv -a -- sleep 1
...
------------------------------------------------------------
perf_event_attr:
size 120
config 0x400000000
{ sample_period, sample_freq } 4000
sample_type IP|TID|TIME|ID|CPU|PERIOD
read_format ID
disabled 1
inherit 1
freq 1
precise_ip 3
sample_id_all 1
exclude_guest 1
------------------------------------------------------------
sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 5
sys_perf_event_open: pid -1 cpu 1 group_fd -1 flags 0x8 = 6
sys_perf_event_open: pid -1 cpu 2 group_fd -1 flags 0x8 = 7
sys_perf_event_open: pid -1 cpu 3 group_fd -1 flags 0x8 = 9
sys_perf_event_open: pid -1 cpu 4 group_fd -1 flags 0x8 = 10
sys_perf_event_open: pid -1 cpu 5 group_fd -1 flags 0x8 = 11
sys_perf_event_open: pid -1 cpu 6 group_fd -1 flags 0x8 = 12
sys_perf_event_open: pid -1 cpu 7 group_fd -1 flags 0x8 = 13
sys_perf_event_open: pid -1 cpu 8 group_fd -1 flags 0x8 = 14
sys_perf_event_open: pid -1 cpu 9 group_fd -1 flags 0x8 = 15
sys_perf_event_open: pid -1 cpu 10 group_fd -1 flags 0x8 = 16
sys_perf_event_open: pid -1 cpu 11 group_fd -1 flags 0x8 = 17
sys_perf_event_open: pid -1 cpu 12 group_fd -1 flags 0x8 = 18
sys_perf_event_open: pid -1 cpu 13 group_fd -1 flags 0x8 = 19
sys_perf_event_open: pid -1 cpu 14 group_fd -1 flags 0x8 = 20
sys_perf_event_open: pid -1 cpu 15 group_fd -1 flags 0x8 = 21
------------------------------------------------------------
perf_event_attr:
size 120
config 0x800000000
{ sample_period, sample_freq } 4000
sample_type IP|TID|TIME|ID|CPU|PERIOD
read_format ID
disabled 1
inherit 1
freq 1
precise_ip 3
sample_id_all 1
exclude_guest 1
------------------------------------------------------------
sys_perf_event_open: pid -1 cpu 16 group_fd -1 flags 0x8 = 22
sys_perf_event_open: pid -1 cpu 17 group_fd -1 flags 0x8 = 23
sys_perf_event_open: pid -1 cpu 18 group_fd -1 flags 0x8 = 24
sys_perf_event_open: pid -1 cpu 19 group_fd -1 flags 0x8 = 25
sys_perf_event_open: pid -1 cpu 20 group_fd -1 flags 0x8 = 26
sys_perf_event_open: pid -1 cpu 21 group_fd -1 flags 0x8 = 27
sys_perf_event_open: pid -1 cpu 22 group_fd -1 flags 0x8 = 28
sys_perf_event_open: pid -1 cpu 23 group_fd -1 flags 0x8 = 29
------------------------------------------------------------

We have to create evlist-hybrid.c otherwise due to the symbol
dependency the perf test python would be failed.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
---
v4:
- Use PERF_TYPE_HARDWARE (v3 uses PERF_TYPE_HARDWARE_PMU).

v3:
- Move the major code to new created evlist-hybrid.c.

tools/perf/builtin-record.c | 19 +++++++++++----
tools/perf/util/Build | 1 +
tools/perf/util/evlist-hybrid.c | 41 +++++++++++++++++++++++++++++++++
tools/perf/util/evlist-hybrid.h | 12 ++++++++++
tools/perf/util/evlist.c | 5 +++-
tools/perf/util/evsel.c | 6 ++---
tools/perf/util/evsel.h | 2 +-
7 files changed, 77 insertions(+), 9 deletions(-)
create mode 100644 tools/perf/util/evlist-hybrid.c
create mode 100644 tools/perf/util/evlist-hybrid.h

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 5fb9665a2ec2..6af46c6a4fd8 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -47,6 +47,8 @@
#include "util/util.h"
#include "util/pfm.h"
#include "util/clockid.h"
+#include "util/pmu-hybrid.h"
+#include "util/evlist-hybrid.h"
#include "asm/bug.h"
#include "perf.h"

@@ -2790,10 +2792,19 @@ int cmd_record(int argc, const char **argv)
if (record.opts.overwrite)
record.opts.tail_synthesize = true;

- if (rec->evlist->core.nr_entries == 0 &&
- __evlist__add_default(rec->evlist, !record.opts.no_samples) < 0) {
- pr_err("Not enough memory for event selector list\n");
- goto out;
+ if (rec->evlist->core.nr_entries == 0) {
+ if (perf_pmu__has_hybrid()) {
+ err = evlist__add_default_hybrid(rec->evlist,
+ !record.opts.no_samples);
+ } else {
+ err = __evlist__add_default(rec->evlist,
+ !record.opts.no_samples);
+ }
+
+ if (err < 0) {
+ pr_err("Not enough memory for event selector list\n");
+ goto out;
+ }
}

if (rec->opts.target.tid && !rec->opts.no_inherit_set)
diff --git a/tools/perf/util/Build b/tools/perf/util/Build
index 00c9fb064ba6..5ac116c895bf 100644
--- a/tools/perf/util/Build
+++ b/tools/perf/util/Build
@@ -10,6 +10,7 @@ perf-y += db-export.o
perf-y += env.o
perf-y += event.o
perf-y += evlist.o
+perf-y += evlist-hybrid.o
perf-y += sideband_evlist.o
perf-y += evsel.o
perf-y += evsel_fprintf.o
diff --git a/tools/perf/util/evlist-hybrid.c b/tools/perf/util/evlist-hybrid.c
new file mode 100644
index 000000000000..e11998526f2e
--- /dev/null
+++ b/tools/perf/util/evlist-hybrid.c
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <errno.h>
+#include <inttypes.h>
+#include "cpumap.h"
+#include "evlist.h"
+#include "evsel.h"
+#include "../perf.h"
+#include "util/pmu-hybrid.h"
+#include "util/evlist-hybrid.h"
+#include <unistd.h>
+#include <stdlib.h>
+#include <linux/err.h>
+#include <linux/string.h>
+#include <perf/evlist.h>
+#include <perf/evsel.h>
+#include <perf/cpumap.h>
+
+int evlist__add_default_hybrid(struct evlist *evlist, bool precise)
+{
+ struct evsel *evsel;
+ struct perf_pmu *pmu;
+ __u64 config;
+ struct perf_cpu_map *cpus;
+
+ perf_pmu__for_each_hybrid_pmu(pmu) {
+ config = PERF_COUNT_HW_CPU_CYCLES |
+ ((__u64)pmu->type << PERF_PMU_TYPE_SHIFT);
+ evsel = evsel__new_cycles(precise, PERF_TYPE_HARDWARE,
+ config);
+ if (!evsel)
+ return -ENOMEM;
+
+ cpus = perf_cpu_map__get(pmu->cpus);
+ evsel->core.cpus = cpus;
+ evsel->core.own_cpus = perf_cpu_map__get(cpus);
+ evsel->pmu_name = strdup(pmu->name);
+ evlist__add(evlist, evsel);
+ }
+
+ return 0;
+}
diff --git a/tools/perf/util/evlist-hybrid.h b/tools/perf/util/evlist-hybrid.h
new file mode 100644
index 000000000000..e25861649d8f
--- /dev/null
+++ b/tools/perf/util/evlist-hybrid.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __PERF_EVLIST_HYBRID_H
+#define __PERF_EVLIST_HYBRID_H
+
+#include <linux/compiler.h>
+#include <linux/kernel.h>
+#include "evlist.h"
+#include <unistd.h>
+
+int evlist__add_default_hybrid(struct evlist *evlist, bool precise);
+
+#endif /* __PERF_EVLIST_HYBRID_H */
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index d29a8a118973..bf149005a972 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -25,6 +25,7 @@
#include "util/string2.h"
#include "util/perf_api_probe.h"
#include "util/evsel_fprintf.h"
+#include "util/evlist-hybrid.h"
#include <signal.h>
#include <unistd.h>
#include <sched.h>
@@ -247,8 +248,10 @@ void evlist__set_leader(struct evlist *evlist)

int __evlist__add_default(struct evlist *evlist, bool precise)
{
- struct evsel *evsel = evsel__new_cycles(precise);
+ struct evsel *evsel;

+ evsel = evsel__new_cycles(precise, PERF_TYPE_HARDWARE,
+ PERF_COUNT_HW_CPU_CYCLES);
if (evsel == NULL)
return -ENOMEM;

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 2d2614eeaa20..0ba4daa09453 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -295,11 +295,11 @@ static bool perf_event_can_profile_kernel(void)
return perf_event_paranoid_check(1);
}

-struct evsel *evsel__new_cycles(bool precise)
+struct evsel *evsel__new_cycles(bool precise, __u32 type, __u64 config)
{
struct perf_event_attr attr = {
- .type = PERF_TYPE_HARDWARE,
- .config = PERF_COUNT_HW_CPU_CYCLES,
+ .type = type,
+ .config = config,
.exclude_kernel = !perf_event_can_profile_kernel(),
};
struct evsel *evsel;
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index d518da2fd2eb..ff89196281bd 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -220,7 +220,7 @@ static inline struct evsel *evsel__newtp(const char *sys, const char *name)
return evsel__newtp_idx(sys, name, 0);
}

-struct evsel *evsel__new_cycles(bool precise);
+struct evsel *evsel__new_cycles(bool precise, __u32 type, __u64 config);

struct tep_event *event_format__new(const char *sys, const char *name);

--
2.17.1