[PATCH RFC v3 00/12] perf pmu-events: Support event aliasing for system PMUs
From: John Garry
Date: Thu May 07 2020 - 08:02:16 EST
Currently event aliasing for only CPU and uncore PMUs is supported. In
fact, only uncore PMUs aliasing is supported for when the uncore PMUs are
fixed for a CPU, which may not always be the case for certain
architectures.
This series adds support for PMU event aliasing for system and other
uncore PMUs which are not tied to a specific CPU. Or, more specifically,
CPUs which not tied to those PMUs.
For this, we introduce system event tables in generated pmu-events.c,
which contain a per-SoC table of events of all its system PMUs. Each
per-PMU event is matched by a "COMPAT" property.
When creating aliases for PMUs, we treat core/uncore* and system PMUs
differently:
- For CPU PMU, we always match for the event mapfile based on the CPUID.
This has not changed.
- For an uncore or system PMU, we iterate through all the events in all
the system PMU tables.
Matches are based on the "COMPAT" property matching the PMU sysfs
identifier contents, in /sys/bus/event_source/devices/<PMU>/identifier
* uncore PMUs may also be matched by system PMUs event support.
Initial reference support is also added for ARM SMMUv3 PMCG (Performance
Monitor Event Group) PMU for HiSilicon hip08 platform with only a single
event so far - see driver in drivers/perf/arm_smmuv3_pmu.c for that driver.
Here is a sample output with this series on Huawei D06CS board:
root@ubuntu:/# ./perf list
[...]
smmu v3 pmcg:
smmuv3_pmcg.config_cache_miss
[Configuration cache miss caused by transaction or(ATS or
non-ATS)translation request. Unit: smmuv3_pmcg]
smmuv3_pmcg.config_struct_access
[Configuration structure access. Unit: smmuv3_pmcg]
smmuv3_pmcg.cycles
[Clock cycles. Unit: smmuv3_pmcg]
smmuv3_pmcg.l1_tlb
[SMMUv3 PMCG L1 TABLE transation. Unit: smmuv3_pmcg]
smmuv3_pmcg.pcie_ats_trans_passed
[PCIe ATS Translated Transaction passed through SMMU. Unit:
smmuv3_pmcg]
smmuv3_pmcg.pcie_ats_trans_rq
[PCIe ATS Translation Request received. Unit: smmuv3_pmcg]
smmuv3_pmcg.tlb_miss
[TLB miss caused by incomingtransaction or (ATS or non-ATS)
translation
request. Unit: smmuv3_pmcg]
smmuv3_pmcg.trans_table_walk_access
[Translation table walk access. Unit: smmuv3_pmcg]
smmuv3_pmcg.transaction
[Transaction. Unit: smmuv3_pmcg]
root@ubuntu:/# ./perf stat -v -e smmuv3_pmcg.l1_tlb sleep 1
Using CPUID 0x00000000480fd010
Using SYSID HIP08
-> smmuv3_pmcg_200100020/event=0x8a/
-> smmuv3_pmcg_200140020/event=0x8a/
-> smmuv3_pmcg_100020/event=0x8a/
-> smmuv3_pmcg_140020/event=0x8a/
-> smmuv3_pmcg_200148020/event=0x8a/
-> smmuv3_pmcg_148020/event=0x8a/
smmuv3_pmcg.l1_tlb: 0 1001221690 1001221690
smmuv3_pmcg.l1_tlb: 0 1001220090 1001220090
smmuv3_pmcg.l1_tlb: 101 1001219660 1001219660
smmuv3_pmcg.l1_tlb: 0 1001219010 1001219010
smmuv3_pmcg.l1_tlb: 0 1001218360 1001218360
smmuv3_pmcg.l1_tlb: 134 1001217850 1001217850
Performance counter stats for 'system wide':
235 smmuv3_pmcg.l1_tlb
1.001263128 seconds time elapsed
root@ubuntu:/#
Support is also added for imx8mm DDR PMU.
Series is here:
https://github.com/hisilicon/kernel-dev/tree/private-topic-perf-5.7-sys-pmu-events-v3
Differences to v2:
- fixups for imx8mm JSONs
- fix for metrics being repeated per PMU
- use sysfs__read_str()
- fix typo in PMCG JSON
- drop evsel fix, which someone else fixed
Differences to v1:
- Stop using SoC id and use a per-PMU identifier instead
- Add metric group sys events support
- This is a bit hacky
- Add imx8mm DDR Perf support
- Add fix for parse events sel
- without it, I get this spewed for metric event:
assertion failed at util/parse-events.c:1637
Patches still need to be sent to support per-PMU identifer sysfs file
in the kernel.
Thanks,
John
Joakim Zhang (1):
perf vendor events: Add JSON metrics for imx8mm DDR Perf
John Garry (11):
perf jevents: Add support for an extra directory level
perf jevents: Add support for system events tables
perf vendor events arm64: Relocate hip08 events
perf vendor events arm64: Add Architected events smmuv3-pmcg.json
perf vendor events arm64: Add hip08 SMMUv3 PMCG events
perf pmu: Add pmu_id()
perf pmu: Add pmu_add_sys_aliases()
perf metricgroup: Split up metricgroup__add_metric()
perf metricgroup: Split up metricgroup__print()
perf metricgroup: Support printing metric groups for system PMUs
perf metricgroup: Support adding metrics for system PMUs
.../arch/arm64/freescale/imx8mm/sys/ddrc.json | 39 +++
.../arch/arm64/freescale/imx8mm/sys/metrics.json | 18 ++
.../hisilicon/hip08/{ => cpu}/core-imp-def.json | 0
.../hisilicon/hip08/{ => cpu}/uncore-ddrc.json | 0
.../hisilicon/hip08/{ => cpu}/uncore-hha.json | 0
.../hisilicon/hip08/{ => cpu}/uncore-l3c.json | 0
.../arm64/hisilicon/hip08/sys/smmu-v3-pmcg.json | 42 +++
tools/perf/pmu-events/arch/arm64/mapfile.csv | 2 +-
tools/perf/pmu-events/arch/arm64/smmuv3-pmcg.json | 58 ++++
tools/perf/pmu-events/jevents.c | 152 ++++++++---
tools/perf/pmu-events/jevents.h | 11 +-
tools/perf/pmu-events/pmu-events.h | 6 +
tools/perf/util/metricgroup.c | 295 +++++++++++++++------
tools/perf/util/pmu.c | 96 +++++++
tools/perf/util/pmu.h | 3 +
15 files changed, 593 insertions(+), 129 deletions(-)
create mode 100644 tools/perf/pmu-events/arch/arm64/freescale/imx8mm/sys/ddrc.json
create mode 100644 tools/perf/pmu-events/arch/arm64/freescale/imx8mm/sys/metrics.json
rename tools/perf/pmu-events/arch/arm64/hisilicon/hip08/{ => cpu}/core-imp-def.json (100%)
rename tools/perf/pmu-events/arch/arm64/hisilicon/hip08/{ => cpu}/uncore-ddrc.json (100%)
rename tools/perf/pmu-events/arch/arm64/hisilicon/hip08/{ => cpu}/uncore-hha.json (100%)
rename tools/perf/pmu-events/arch/arm64/hisilicon/hip08/{ => cpu}/uncore-l3c.json (100%)
create mode 100644 tools/perf/pmu-events/arch/arm64/hisilicon/hip08/sys/smmu-v3-pmcg.json
create mode 100644 tools/perf/pmu-events/arch/arm64/smmuv3-pmcg.json
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2.16.4