Re: [PATCH 4/5] perf x86 evlist: Add default hybrid events for perf stat
From: Namhyung Kim
Date: Wed Jun 08 2022 - 20:04:25 EST
Hello,
On Tue, Jun 7, 2022 at 12:31 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>
> ---
> 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..1b3f9e1a2287 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, j = 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 + j);
Probably no need to calculate index (j) as it's updated
later when it goes to the evlist...
> + if (evsel == NULL)
> + goto out_delete_partial_list;
> + j++;
> + list_add_tail(&evsel->core.node, &head);
> + continue;
> + }
> +
> + perf_pmu__for_each_hybrid_pmu(pmu) {
> + evsel = evsel__new_idx(attrs + i, evlist->core.nr_entries + j);
> + if (evsel == NULL)
> + goto out_delete_partial_list;
> + j++;
> + evsel->core.attr.config |= (__u64)pmu->type << PERF_PMU_TYPE_SHIFT;
> + 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);
> + list_add_tail(&evsel->core.node, &head);
> + }
> + }
> +
> + evlist__splice_list_tail(evlist, &head);
... like here.
Thanks,
Namhyung
> +
> + return 0;
> +
> +out_delete_partial_list:
> + __evlist__for_each_entry_safe(&head, n, evsel)
> + evsel__delete(evsel);
> + return -1;
> +}