Re: [PATCH v2 4/5] perf x86 evlist: Add default hybrid events for perf stat
From: Xing Zhengjun
Date: Thu Jun 09 2022 - 22:31:13 EST
On 6/10/2022 5:54 AM, Namhyung Kim wrote:
Hello,
On Thu, Jun 9, 2022 at 9:01 AM Liang, Kan <kan.liang@xxxxxxxxxxxxxxx> wrote:
On 6/9/2022 10:53 AM, zhengjun.xing@xxxxxxxxxxxxxxx wrote:
From: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
Provide a new solution to replace the reverted commit ac2dc29edd21
("perf stat: Add default hybrid events").
For the default software attrs, nothing is changed.
For the default hardware attrs, create a new evsel for each hybrid pmu.
With the new solution, adding a new default attr will not require the
special support for the hybrid platform anymore.
Also, the "--detailed" is supported on the hybrid platform
With the patch,
./perf stat -a -ddd sleep 1
Performance counter stats for 'system wide':
32,231.06 msec cpu-clock # 32.056 CPUs utilized
529 context-switches # 16.413 /sec
32 cpu-migrations # 0.993 /sec
69 page-faults # 2.141 /sec
176,754,151 cpu_core/cycles/ # 5.484 M/sec (41.65%)
161,695,280 cpu_atom/cycles/ # 5.017 M/sec (49.92%)
48,595,992 cpu_core/instructions/ # 1.508 M/sec (49.98%)
32,363,337 cpu_atom/instructions/ # 1.004 M/sec (58.26%)
10,088,639 cpu_core/branches/ # 313.010 K/sec (58.31%)
6,390,582 cpu_atom/branches/ # 198.274 K/sec (58.26%)
846,201 cpu_core/branch-misses/ # 26.254 K/sec (66.65%)
676,477 cpu_atom/branch-misses/ # 20.988 K/sec (58.27%)
14,290,070 cpu_core/L1-dcache-loads/ # 443.363 K/sec (66.66%)
9,983,532 cpu_atom/L1-dcache-loads/ # 309.749 K/sec (58.27%)
740,725 cpu_core/L1-dcache-load-misses/ # 22.982 K/sec (66.66%)
<not supported> cpu_atom/L1-dcache-load-misses/
480,441 cpu_core/LLC-loads/ # 14.906 K/sec (66.67%)
326,570 cpu_atom/LLC-loads/ # 10.132 K/sec (58.27%)
329 cpu_core/LLC-load-misses/ # 10.208 /sec (66.68%)
0 cpu_atom/LLC-load-misses/ # 0.000 /sec (58.32%)
<not supported> cpu_core/L1-icache-loads/
21,982,491 cpu_atom/L1-icache-loads/ # 682.028 K/sec (58.43%)
4,493,189 cpu_core/L1-icache-load-misses/ # 139.406 K/sec (33.34%)
4,711,404 cpu_atom/L1-icache-load-misses/ # 146.176 K/sec (50.08%)
13,713,090 cpu_core/dTLB-loads/ # 425.462 K/sec (33.34%)
9,384,727 cpu_atom/dTLB-loads/ # 291.170 K/sec (50.08%)
157,387 cpu_core/dTLB-load-misses/ # 4.883 K/sec (33.33%)
108,328 cpu_atom/dTLB-load-misses/ # 3.361 K/sec (50.08%)
<not supported> cpu_core/iTLB-loads/
<not supported> cpu_atom/iTLB-loads/
37,655 cpu_core/iTLB-load-misses/ # 1.168 K/sec (33.32%)
61,661 cpu_atom/iTLB-load-misses/ # 1.913 K/sec (50.03%)
<not supported> cpu_core/L1-dcache-prefetches/
<not supported> cpu_atom/L1-dcache-prefetches/
<not supported> cpu_core/L1-dcache-prefetch-misses/
<not supported> cpu_atom/L1-dcache-prefetch-misses/
1.005466919 seconds time elapsed
Signed-off-by: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
Signed-off-by: Zhengjun Xing <zhengjun.xing@xxxxxxxxxxxxxxx>
---
Change log:
v2:
* The index of all new evsel will be updated when adding to the evlist,
just set 0 idx for the new evsel.
tools/perf/arch/x86/util/evlist.c | 52 ++++++++++++++++++++++++++++++-
tools/perf/util/evlist.c | 2 +-
tools/perf/util/evlist.h | 2 ++
3 files changed, 54 insertions(+), 2 deletions(-)
diff --git a/tools/perf/arch/x86/util/evlist.c b/tools/perf/arch/x86/util/evlist.c
index 777bdf182a58..fd3500fd4b69 100644
--- a/tools/perf/arch/x86/util/evlist.c
+++ b/tools/perf/arch/x86/util/evlist.c
@@ -4,16 +4,66 @@
#include "util/evlist.h"
#include "util/parse-events.h"
#include "topdown.h"
+#include "util/event.h"
+#include "util/pmu-hybrid.h"
#define TOPDOWN_L1_EVENTS "{slots,topdown-retiring,topdown-bad-spec,topdown-fe-bound,topdown-be-bound}"
#define TOPDOWN_L2_EVENTS "{slots,topdown-retiring,topdown-bad-spec,topdown-fe-bound,topdown-be-bound,topdown-heavy-ops,topdown-br-mispredict,topdown-fetch-lat,topdown-mem-bound}"
+static int ___evlist__add_default_attrs(struct evlist *evlist,
+ struct perf_event_attr *attrs,
+ size_t nr_attrs)
+{
+ struct perf_cpu_map *cpus;
+ struct evsel *evsel, *n;
+ struct perf_pmu *pmu;
+ LIST_HEAD(head);
+ size_t i = 0;
+
+ for (i = 0; i < nr_attrs; i++)
+ event_attr_init(attrs + i);
+
+ if (!perf_pmu__has_hybrid())
+ return evlist__add_attrs(evlist, attrs, nr_attrs);
+
+ for (i = 0; i < nr_attrs; i++) {
+ if (attrs[i].type == PERF_TYPE_SOFTWARE) {
+ evsel = evsel__new_idx(attrs + i, evlist->core.nr_entries);
Although the idx will be updated later, the value doesn't matter.
I think it should be better to use 0, rather than
evlist->core.nr_entries. Because it's a new evsel and hasn't been added
into the evlist yet.
You can just use evsel__new() which does the same.
Yes, evsel__new() can work for it, I will update it in the next version,
thanks.
Thanks,
Namhyung
--
Zhengjun Xing