From: Jin Yao <yao.jin@linux.intel.com>
To: acme@kernel.org, jolsa@kernel.org, peterz@infradead.org,
mingo@redhat.com, alexander.shishkin@linux.intel.com
Cc: Linux-kernel@vger.kernel.org, ak@linux.intel.com,
kan.liang@intel.com, yao.jin@intel.com,
Jin Yao <yao.jin@linux.intel.com>
Subject: [PATCH v3 11/27] perf pmu: Support 'cycles' and 'branches' inside hybrid PMU
Date: Mon, 29 Mar 2021 15:00:30 +0800 [thread overview]
Message-ID: <20210329070046.8815-12-yao.jin@linux.intel.com> (raw)
In-Reply-To: <20210329070046.8815-1-yao.jin@linux.intel.com>
On hybrid platform, user may want to enable the hardware event
only on one PMU. So following syntax is supported:
cpu_core/<hardware event>/
cpu_atom/<hardware event>/
# perf stat -e cpu_core/cpu-cycles/ -a -- sleep 1
Performance counter stats for 'system wide':
6,049,336 cpu_core/cpu-cycles/
1.003577042 seconds time elapsed
It enables the event 'cpu-cycles' only on cpu_core pmu.
But for 'cycles' and 'branches', the syntax doesn't work.
Before:
# perf stat -e cpu_core/cycles/ -a -- sleep 1
event syntax error: 'cpu_core/cycles/'
\___ unknown term 'cycles' for pmu 'cpu_core'
# perf stat -e cpu_core/branches/ -a -- sleep 1
event syntax error: 'cpu_core/branches/'
\___ unknown term 'branches' for pmu 'cpu_core'
For 'cpu-cycles', why it works is because the event is defined in
/sys/devices/cpu_core/events/. It's added as alias by
pmu_add_sys_aliases and it's treated as 'event' when parsing the
term->config.
We use a similar idea, create a pme_hybrid_fixup table for
'cycles' and 'branches' and add them as aliases.
After:
# perf stat -e cpu_core/cycles/ -a -- sleep 1
Performance counter stats for 'system wide':
5,769,631 cpu_core/cycles/
1.003833235 seconds time elapsed
# perf stat -e cpu_core/branches/ -a -- sleep 1
Performance counter stats for 'system wide':
490,951 cpu_core/branches/
1.003693946 seconds time elapsed
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
---
v3:
- New patch in v3.
tools/perf/util/pmu.c | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index beff29981101..72e5ae5e868e 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -916,6 +916,35 @@ static int pmu_max_precise(const char *name)
return max_precise;
}
+static void perf_pmu__add_hybrid_aliases(struct list_head *head)
+{
+ static struct pmu_event pme_hybrid_fixup[] = {
+ {
+ .name = "cycles",
+ .event = "event=0x3c",
+ },
+ {
+ .name = "branches",
+ .event = "event=0xc4",
+ },
+ {
+ .name = 0,
+ .event = 0,
+ },
+ };
+ int i = 0;
+
+ while (1) {
+ struct pmu_event *pe = &pme_hybrid_fixup[i++];
+
+ if (!pe->name)
+ break;
+
+ __perf_pmu__new_alias(head, NULL, (char *)pe->name, NULL,
+ (char *)pe->event, NULL);
+ }
+}
+
static struct perf_pmu *pmu_lookup(const char *name)
{
struct perf_pmu *pmu;
@@ -955,6 +984,9 @@ static struct perf_pmu *pmu_lookup(const char *name)
pmu_add_cpu_aliases(&aliases, pmu);
pmu_add_sys_aliases(&aliases, pmu);
+ if (pmu->is_hybrid)
+ perf_pmu__add_hybrid_aliases(&aliases);
+
INIT_LIST_HEAD(&pmu->format);
INIT_LIST_HEAD(&pmu->aliases);
INIT_LIST_HEAD(&pmu->caps);
--
2.17.1
next prev parent reply other threads:[~2021-03-29 7:03 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-29 7:00 [PATCH v3 00/27] perf tool: AlderLake hybrid support series 1 Jin Yao
2021-03-29 7:00 ` [PATCH v3 01/27] tools headers uapi: Update tools's copy of linux/perf_event.h Jin Yao
2021-03-29 7:00 ` [PATCH v3 02/27] perf jevents: Support unit value "cpu_core" and "cpu_atom" Jin Yao
2021-03-29 7:00 ` [PATCH v3 03/27] perf pmu: Simplify arguments of __perf_pmu__new_alias Jin Yao
2021-03-29 7:00 ` [PATCH v3 04/27] perf pmu: Save pmu name Jin Yao
2021-03-29 7:00 ` [PATCH v3 05/27] perf pmu: Save detected hybrid pmus to a global pmu list Jin Yao
2021-03-29 7:00 ` [PATCH v3 06/27] perf pmu: Add hybrid helper functions Jin Yao
2021-03-29 7:00 ` [PATCH v3 07/27] perf stat: Uniquify hybrid event name Jin Yao
2021-03-29 7:00 ` [PATCH v3 08/27] perf parse-events: Create two hybrid hardware events Jin Yao
2021-03-29 7:00 ` [PATCH v3 09/27] perf parse-events: Create two hybrid cache events Jin Yao
2021-04-09 13:48 ` Jiri Olsa
2021-04-12 1:15 ` Jin, Yao
2021-03-29 7:00 ` [PATCH v3 10/27] perf parse-events: Create two hybrid raw events Jin Yao
2021-04-09 13:49 ` Jiri Olsa
2021-04-12 1:14 ` Jin, Yao
2021-03-29 7:00 ` Jin Yao [this message]
2021-04-09 13:48 ` [PATCH v3 11/27] perf pmu: Support 'cycles' and 'branches' inside hybrid PMU Jiri Olsa
2021-04-12 2:01 ` Jin, Yao
2021-03-29 7:00 ` [PATCH v3 12/27] perf parse-events: Support no alias assigned event " Jin Yao
2021-04-09 13:47 ` Jiri Olsa
2021-04-12 2:51 ` Jin, Yao
2021-04-13 12:36 ` Jiri Olsa
2021-04-15 11:03 ` Jiri Olsa
2021-04-15 13:36 ` Jin, Yao
2021-04-15 14:11 ` Jiri Olsa
2021-04-15 14:53 ` Jin, Yao
2021-04-15 19:39 ` Jiri Olsa
2021-04-16 1:57 ` Jin, Yao
2021-03-29 7:00 ` [PATCH v3 13/27] perf record: Create two hybrid 'cycles' events by default Jin Yao
2021-03-29 7:00 ` [PATCH v3 14/27] perf stat: Add default hybrid events Jin Yao
2021-03-29 7:00 ` [PATCH v3 15/27] perf stat: Filter out unmatched aggregation for hybrid event Jin Yao
2021-03-29 7:00 ` [PATCH v3 16/27] perf stat: Warn group events from different hybrid PMU Jin Yao
2021-03-29 7:00 ` [PATCH v3 17/27] perf script: Support PERF_TYPE_HARDWARE_PMU and PERF_TYPE_HW_CACHE_PMU Jin Yao
2021-03-29 7:00 ` [PATCH v3 18/27] perf record: Uniquify hybrid event name Jin Yao
2021-03-29 7:00 ` [PATCH v3 19/27] perf tests: Add hybrid cases for 'Parse event definition strings' test Jin Yao
2021-03-29 7:00 ` [PATCH v3 20/27] perf tests: Add hybrid cases for 'Roundtrip evsel->name' test Jin Yao
2021-03-29 7:00 ` [PATCH v3 21/27] perf tests: Skip 'Setup struct perf_event_attr' test for hybrid Jin Yao
2021-03-29 7:00 ` [PATCH v3 22/27] perf tests: Support 'Track with sched_switch' " Jin Yao
2021-03-29 7:00 ` [PATCH v3 23/27] perf tests: Support 'Parse and process metrics' " Jin Yao
2021-03-29 7:00 ` [PATCH v3 24/27] perf tests: Support 'Session topology' " Jin Yao
2021-03-29 7:00 ` [PATCH v3 25/27] perf tests: Support 'Convert perf time to TSC' " Jin Yao
2021-03-29 7:00 ` [PATCH v3 26/27] perf tests: Skip 'perf stat metrics (shadow stat) test' " Jin Yao
2021-03-29 7:00 ` [PATCH v3 27/27] perf Documentation: Document intel-hybrid support Jin Yao
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