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Open Source and information security mailing list archives
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Date: Wed, 17 May 2023 07:57:40 -0700
From: Ian Rogers <irogers@...gle.com>
To: Suzuki K Poulose <suzuki.poulose@....com>,
Mike Leach <mike.leach@...aro.org>,
Leo Yan <leo.yan@...aro.org>,
John Garry <john.g.garry@...cle.com>,
Will Deacon <will@...nel.org>,
James Clark <james.clark@....com>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Jiri Olsa <jolsa@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Ian Rogers <irogers@...gle.com>,
Adrian Hunter <adrian.hunter@...el.com>,
Kajol Jain <kjain@...ux.ibm.com>,
Jing Zhang <renyu.zj@...ux.alibaba.com>,
Kan Liang <kan.liang@...ux.intel.com>,
Zhengjun Xing <zhengjun.xing@...ux.intel.com>,
Ravi Bangoria <ravi.bangoria@....com>,
Madhavan Srinivasan <maddy@...ux.ibm.com>,
Athira Rajeev <atrajeev@...ux.vnet.ibm.com>,
Ming Wang <wangming01@...ngson.cn>,
Huacai Chen <chenhuacai@...nel.org>,
Sandipan Das <sandipan.das@....com>,
Dmitrii Dolgov <9erthalion6@...il.com>,
Sean Christopherson <seanjc@...gle.com>,
Raul Silvera <rsilvera@...gle.com>,
Ali Saidi <alisaidi@...zon.com>, Rob Herring <robh@...nel.org>,
Thomas Richter <tmricht@...ux.ibm.com>,
Kang Minchul <tegongkang@...il.com>,
linux-kernel@...r.kernel.org, coresight@...ts.linaro.org,
linux-arm-kernel@...ts.infradead.org,
linux-perf-users@...r.kernel.org
Subject: [PATCH v1 00/23] PMU refactoring and improvements
Separate the code in pmu.[ch] from the set/list of PMUs case and the
particular PMU case. Move the set/list of PMUs case code into
pmus.[ch]. Clean up hybrid code and remove hybrid PMU list, it is
sufficient to scan PMUs looking for core ones. Add core PMU list and
perf_pmus__scan_core that just reads core PMUs. Switch code that skips
non-core PMUs during a perf_pmus__scan, to use the
perf_pmus__scan_core variant. Don't scan sysfs for PMUs if all such
PMUs have been previously scanned/loaded. Scanning just just core
PMUs, for the cases it is applicable, can improve the sysfs reading
time by more than 4 fold on my laptop, as servers generally have many
more uncore PMUs the improvement there should be larger:
```
$ perf bench internals pmu-scan -i 1000
Computing performance of sysfs PMU event scan for 1000 times
Average core PMU scanning took: 989.231 usec (+- 1.535 usec)
Average PMU scanning took: 4309.425 usec (+- 74.322 usec)
```
The patch "perf pmu: Separate pmu and pmus" moves and renames a lot of
functions, and is consequently large. The changes are trivial, but
kept together to keep the overall number of patches more reasonable.
Ian Rogers (23):
perf tools: Warn if no user requested CPUs match PMU's CPUs
perf evlist: Remove evlist__warn_hybrid_group
perf evlist: Remove __evlist__add_default
perf evlist: Reduce scope of evlist__has_hybrid
perf pmu: Remove perf_pmu__hybrid_mounted
perf pmu: Detect ARM and hybrid PMUs with sysfs
perf pmu: Add is_core to pmu
perf pmu: Rewrite perf_pmu__has_hybrid to avoid list
perf x86: Iterate hybrid PMUs as core PMUs
perf topology: Avoid hybrid list for hybrid topology
perf evsel: Compute is_hybrid from PMU being core
perf header: Avoid hybrid PMU list in write_pmu_caps
perf metrics: Remove perf_pmu__is_hybrid use
perf stat: Avoid hybrid PMU list
perf mem: Avoid hybrid PMU list
perf pmu: Remove perf_pmu__hybrid_pmus list
perf pmus: Prefer perf_pmu__scan over perf_pmus__for_each_pmu
perf x86 mem: minor refactor to is_mem_loads_aux_event
perf pmu: Separate pmu and pmus
perf pmus: Split pmus list into core and uncore
perf pmus: Allow just core PMU scanning
perf pmus: Avoid repeated sysfs scanning
perf pmus: Ensure all PMUs are read for find_by_type
tools/perf/arch/arm/util/auxtrace.c | 7 +-
tools/perf/arch/arm/util/cs-etm.c | 4 +-
tools/perf/arch/arm64/util/pmu.c | 6 +-
tools/perf/arch/x86/tests/hybrid.c | 7 +-
tools/perf/arch/x86/util/auxtrace.c | 5 +-
tools/perf/arch/x86/util/evlist.c | 25 +-
tools/perf/arch/x86/util/evsel.c | 27 +-
tools/perf/arch/x86/util/intel-bts.c | 4 +-
tools/perf/arch/x86/util/intel-pt.c | 4 +-
tools/perf/arch/x86/util/mem-events.c | 17 +-
tools/perf/arch/x86/util/perf_regs.c | 15 +-
tools/perf/arch/x86/util/topdown.c | 5 +-
tools/perf/bench/pmu-scan.c | 60 ++--
tools/perf/builtin-c2c.c | 9 +-
tools/perf/builtin-list.c | 4 +-
tools/perf/builtin-mem.c | 9 +-
tools/perf/builtin-record.c | 29 +-
tools/perf/builtin-stat.c | 15 +-
tools/perf/builtin-top.c | 10 +-
tools/perf/tests/attr.c | 4 +-
tools/perf/tests/event_groups.c | 7 +-
tools/perf/tests/parse-events.c | 15 +-
tools/perf/tests/parse-metric.c | 4 +-
tools/perf/tests/pmu-events.c | 6 +-
tools/perf/tests/switch-tracking.c | 4 +-
tools/perf/tests/topology.c | 4 +-
tools/perf/util/Build | 2 -
tools/perf/util/cpumap.h | 2 +-
tools/perf/util/cputopo.c | 16 +-
tools/perf/util/env.c | 5 +-
tools/perf/util/evlist-hybrid.c | 162 ---------
tools/perf/util/evlist-hybrid.h | 15 -
tools/perf/util/evlist.c | 67 +++-
tools/perf/util/evlist.h | 9 +-
tools/perf/util/evsel.c | 57 +--
tools/perf/util/evsel.h | 3 -
tools/perf/util/header.c | 27 +-
tools/perf/util/mem-events.c | 17 +-
tools/perf/util/metricgroup.c | 9 +-
tools/perf/util/parse-events.c | 24 +-
tools/perf/util/parse-events.y | 3 +-
tools/perf/util/pfm.c | 6 +-
tools/perf/util/pmu-hybrid.c | 52 ---
tools/perf/util/pmu-hybrid.h | 32 --
tools/perf/util/pmu.c | 482 ++------------------------
tools/perf/util/pmu.h | 26 +-
tools/perf/util/pmus.c | 477 ++++++++++++++++++++++++-
tools/perf/util/pmus.h | 15 +-
tools/perf/util/print-events.c | 15 +-
tools/perf/util/python-ext-sources | 1 -
tools/perf/util/stat-display.c | 21 +-
51 files changed, 819 insertions(+), 1032 deletions(-)
delete mode 100644 tools/perf/util/evlist-hybrid.c
delete mode 100644 tools/perf/util/evlist-hybrid.h
delete mode 100644 tools/perf/util/pmu-hybrid.c
delete mode 100644 tools/perf/util/pmu-hybrid.h
--
2.40.1.606.ga4b1b128d6-goog
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