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Subject[PATCH 42/49] perf evlist: Create two hybrid 'cycles' events by default
Date
From: Jin Yao <yao.jin@linux.intel.com>

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 core, the other is for atom.

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

root@otcpl-adl-s-2:~# ./perf record -vv -- sleep 1
...
------------------------------------------------------------
perf_event_attr:
type 6
size 120
config 0x400000000
{ sample_period, sample_freq } 4000
sample_type IP|TID|TIME|ID|PERIOD
read_format ID
disabled 1
inherit 1
mmap 1
comm 1
freq 1
enable_on_exec 1
task 1
precise_ip 3
sample_id_all 1
exclude_guest 1
mmap2 1
comm_exec 1
ksymbol 1
bpf_event 1
------------------------------------------------------------
sys_perf_event_open: pid 11609 cpu 0 group_fd -1 flags 0x8 = 5
sys_perf_event_open: pid 11609 cpu 1 group_fd -1 flags 0x8 = 6
sys_perf_event_open: pid 11609 cpu 2 group_fd -1 flags 0x8 = 7
sys_perf_event_open: pid 11609 cpu 3 group_fd -1 flags 0x8 = 9
sys_perf_event_open: pid 11609 cpu 4 group_fd -1 flags 0x8 = 10
sys_perf_event_open: pid 11609 cpu 5 group_fd -1 flags 0x8 = 11
sys_perf_event_open: pid 11609 cpu 6 group_fd -1 flags 0x8 = 12
sys_perf_event_open: pid 11609 cpu 7 group_fd -1 flags 0x8 = 13
sys_perf_event_open: pid 11609 cpu 8 group_fd -1 flags 0x8 = 14
sys_perf_event_open: pid 11609 cpu 9 group_fd -1 flags 0x8 = 15
sys_perf_event_open: pid 11609 cpu 10 group_fd -1 flags 0x8 = 16
sys_perf_event_open: pid 11609 cpu 11 group_fd -1 flags 0x8 = 17
sys_perf_event_open: pid 11609 cpu 12 group_fd -1 flags 0x8 = 18
sys_perf_event_open: pid 11609 cpu 13 group_fd -1 flags 0x8 = 19
sys_perf_event_open: pid 11609 cpu 14 group_fd -1 flags 0x8 = 20
sys_perf_event_open: pid 11609 cpu 15 group_fd -1 flags 0x8 = 21
------------------------------------------------------------
perf_event_attr:
type 6
size 120
config 0xa00000000
{ sample_period, sample_freq } 4000
sample_type IP|TID|TIME|ID|PERIOD
read_format ID
disabled 1
inherit 1
freq 1
enable_on_exec 1
precise_ip 3
sample_id_all 1
exclude_guest 1
------------------------------------------------------------
sys_perf_event_open: pid 11609 cpu 16 group_fd -1 flags 0x8 = 22
sys_perf_event_open: pid 11609 cpu 17 group_fd -1 flags 0x8 = 23
sys_perf_event_open: pid 11609 cpu 18 group_fd -1 flags 0x8 = 24
sys_perf_event_open: pid 11609 cpu 19 group_fd -1 flags 0x8 = 25
sys_perf_event_open: pid 11609 cpu 20 group_fd -1 flags 0x8 = 26
sys_perf_event_open: pid 11609 cpu 21 group_fd -1 flags 0x8 = 27
sys_perf_event_open: pid 11609 cpu 22 group_fd -1 flags 0x8 = 28
sys_perf_event_open: pid 11609 cpu 23 group_fd -1 flags 0x8 = 29
...
------------------------------------------------------------
perf_event_attr:
type 1
size 120
config 0x9
watermark 1
sample_id_all 1
bpf_event 1
{ wakeup_events, wakeup_watermark } 1
------------------------------------------------------------
sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 30
sys_perf_event_open: pid -1 cpu 1 group_fd -1 flags 0x8 = 31
sys_perf_event_open: pid -1 cpu 2 group_fd -1 flags 0x8 = 32
sys_perf_event_open: pid -1 cpu 3 group_fd -1 flags 0x8 = 33
sys_perf_event_open: pid -1 cpu 4 group_fd -1 flags 0x8 = 34
sys_perf_event_open: pid -1 cpu 5 group_fd -1 flags 0x8 = 35
sys_perf_event_open: pid -1 cpu 6 group_fd -1 flags 0x8 = 36
sys_perf_event_open: pid -1 cpu 7 group_fd -1 flags 0x8 = 37
sys_perf_event_open: pid -1 cpu 8 group_fd -1 flags 0x8 = 38
sys_perf_event_open: pid -1 cpu 9 group_fd -1 flags 0x8 = 39
sys_perf_event_open: pid -1 cpu 10 group_fd -1 flags 0x8 = 40
sys_perf_event_open: pid -1 cpu 11 group_fd -1 flags 0x8 = 41
sys_perf_event_open: pid -1 cpu 12 group_fd -1 flags 0x8 = 42
sys_perf_event_open: pid -1 cpu 13 group_fd -1 flags 0x8 = 43
sys_perf_event_open: pid -1 cpu 14 group_fd -1 flags 0x8 = 44
sys_perf_event_open: pid -1 cpu 15 group_fd -1 flags 0x8 = 45
sys_perf_event_open: pid -1 cpu 16 group_fd -1 flags 0x8 = 46
sys_perf_event_open: pid -1 cpu 17 group_fd -1 flags 0x8 = 47
sys_perf_event_open: pid -1 cpu 18 group_fd -1 flags 0x8 = 48
sys_perf_event_open: pid -1 cpu 19 group_fd -1 flags 0x8 = 49
sys_perf_event_open: pid -1 cpu 20 group_fd -1 flags 0x8 = 50
sys_perf_event_open: pid -1 cpu 21 group_fd -1 flags 0x8 = 51
sys_perf_event_open: pid -1 cpu 22 group_fd -1 flags 0x8 = 52
sys_perf_event_open: pid -1 cpu 23 group_fd -1 flags 0x8 = 53
...

We can see one core 'cycles' (0x400000000) is enabled on cpu0-cpu15
and atom 'cycles' (0xa00000000) is enabled on cpu16-cpu23.

Reviewed-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
---
tools/perf/util/evlist.c | 33 ++++++++++++++++++++++++++++++++-
tools/perf/util/evsel.c | 6 +++---
tools/perf/util/evsel.h | 2 +-
3 files changed, 36 insertions(+), 5 deletions(-)

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 626a0e7..8606e82 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -243,10 +243,41 @@ void evlist__set_leader(struct evlist *evlist)
}
}

+static int __evlist__add_hybrid_default(struct evlist *evlist, bool precise)
+{
+ struct evsel *evsel;
+ struct perf_pmu *pmu;
+ __u64 config;
+ struct perf_cpu_map *cpus;
+
+ perf_pmu__for_each_hybrid_pmus(pmu) {
+ config = PERF_COUNT_HW_CPU_CYCLES |
+ ((__u64)pmu->type << PERF_PMU_TYPE_SHIFT);
+ evsel = evsel__new_cycles(precise, PERF_TYPE_HARDWARE_PMU,
+ 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;
+}
+
int __evlist__add_default(struct evlist *evlist, bool precise)
{
- struct evsel *evsel = evsel__new_cycles(precise);
+ struct evsel *evsel;
+
+ perf_pmu__scan(NULL);
+ if (perf_pmu__hybrid_exist())
+ return __evlist__add_hybrid_default(evlist, precise);

+ 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 24c0b59..61508cf 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -292,11 +292,11 @@ 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 4eb054a..aa73442 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -198,7 +198,7 @@ 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);

--
2.7.4
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