Messages in this thread | | | Date | Wed, 21 Apr 2021 12:03:33 +0200 | From | Jiri Olsa <> | Subject | Re: [PATCH v4 00/25] perf tool: AlderLake hybrid support series 1 |
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On Wed, Apr 21, 2021 at 09:14:20AM +0800, Jin, Yao wrote: > Hi Arnaldo, Hi Jiri, > > Kan's patch series for AlderLake perf core support has been upstreamed, so > the interface will not be changed any more. > > For this perf tool series (v4), do you have any comments?
hi, I plan to go through it this week
jirka
> > Thanks > Jin Yao > > On 4/16/2021 10:04 PM, Jin Yao wrote: > > AlderLake uses a hybrid architecture utilizing Golden Cove cores > > (core cpu) and Gracemont cores (atom cpu). Each cpu has dedicated > > event list. Some events are available on core cpu, some events > > are available on atom cpu and some events can be available on both. > > > > Kernel exports new pmus "cpu_core" and "cpu_atom" through sysfs: > > /sys/devices/cpu_core > > /sys/devices/cpu_atom > > > > cat /sys/devices/cpu_core/cpus > > 0-15 > > > > cat /sys/devices/cpu_atom/cpus > > 16-23 > > > > In this example, core cpus are 0-15 and atom cpus are 16-23. > > > > To enable a core only event or atom only event: > > > > cpu_core/<event name>/ > > or > > cpu_atom/<event name>/ > > > > Count the 'cycles' event on core cpus. > > > > # perf stat -e cpu_core/cycles/ -a -- sleep 1 > > > > Performance counter stats for 'system wide': > > > > 12,853,951,349 cpu_core/cycles/ > > > > 1.002581249 seconds time elapsed > > > > If one event is available on both atom cpu and core cpu, two events > > are created automatically. > > > > # perf stat -e cycles -a -- sleep 1 > > > > Performance counter stats for 'system wide': > > > > 12,856,467,438 cpu_core/cycles/ > > 6,404,634,785 cpu_atom/cycles/ > > > > 1.002453013 seconds time elapsed > > > > Group is supported if the events are from same pmu, otherwise a warning > > is displayed and disable grouping automatically. > > > > # perf stat -e '{cpu_core/cycles/,cpu_core/instructions/}' -a -- sleep 1 > > > > Performance counter stats for 'system wide': > > > > 12,863,866,968 cpu_core/cycles/ > > 554,795,017 cpu_core/instructions/ > > > > 1.002616117 seconds time elapsed > > > > # perf stat -e '{cpu_core/cycles/,cpu_atom/instructions/}' -a -- sleep 1 > > WARNING: events in group from different hybrid PMUs! > > WARNING: grouped events cpus do not match, disabling group: > > anon group { cpu_core/cycles/, cpu_atom/instructions/ } > > > > Performance counter stats for 'system wide': > > > > 6,283,970 cpu_core/cycles/ > > 765,635 cpu_atom/instructions/ > > > > 1.003959036 seconds time elapsed > > > > Note that, since the whole patchset for AlderLake hybrid support is very > > large (40+ patches). For simplicity, it's splitted into several patch > > series. > > > > The patch series 1 only supports the basic functionality. The advanced > > supports for perf-c2c/perf-mem/topdown/metrics/topology header and others > > will be added in follow-up patch series. > > > > The perf tool codes can also be found at: > > https://github.com/yaoj/perf.git > > > > v4: > > --- > > - In Liang Kan's patch: > > '[PATCH V6 21/25] perf: Extend PERF_TYPE_HARDWARE and PERF_TYPE_HW_CACHE', > > the user interface for hardware events and cache events are changed, so > > perf tool patches are changed as well. > > > > - Fix an issue when atom CPUs are offlined. "/sys/bus/event_source/devices/cpu_atom/cpus" > > exists but the content is empty. For this case, we can't enable the cpu_atom > > PMU. '[PATCH v4 05/25] perf pmu: Save detected hybrid pmus to a global pmu list' > > > > - Define 'ret' variable for return value in patch > > '[PATCH v4 09/25] perf parse-events: Create two hybrid cache events' > > > > - Directly return add_raw_hybrid() in patch > > '[PATCH v4 10/25] perf parse-events: Create two hybrid raw events' > > - Drop the patch 'perf pmu: Support 'cycles' and 'branches' inside > > hybrid PMU'. > > > > - Separate '[PATCH v3 12/27] perf parse-events: Support no alias assigned event > > inside hybrid PMU' into two patches: > > '[PATCH v4 11/25] perf parse-events: Compare with hybrid pmu name' > > '[PATCH v4 12/25] perf parse-events: Support event inside hybrid pmu'. > > And these two patches are improved according to Jiri's comments. > > > > v3: > > --- > > - Drop 'perf evlist: Hybrid event uses its own cpus'. This patch is wide > > and actually it's not very necessary. The current perf framework has > > processed the cpus for evsel well even for hybrid evsel. So this patch can > > be dropped. > > > > - Drop 'perf evsel: Adjust hybrid event and global event mixed group'. > > The patch is a bit tricky and hard to understand. In v3, we will disable > > grouping when the group members are from different PMUs. So this patch > > would be not necessary. > > > > - Create parse-events-hybrid.c/parse-events-hybrid.h and evlist-hybrid.c/evlist-hybrid.h. > > Move hybrid related codes to these files. > > > > - Create a new patch 'perf pmu: Support 'cycles' and 'branches' inside hybrid PMU' to > > support 'cycles' and 'branches' inside PMU. > > > > - Create a new patch 'perf record: Uniquify hybrid event name' to tell user the > > pmu which the event belongs to for perf-record. > > > > - If group members are from different hybrid PMUs, shows warning and disable > > grouping. > > > > - Other refining and refactoring. > > > > v2: > > --- > > - Drop kernel patches (Kan posted the series "Add Alder Lake support for perf (kernel)" separately). > > - Drop the patches for perf-c2c/perf-mem/topdown/metrics/topology header supports, > > which will be added in series 2 or series 3. > > - Simplify the arguments of __perf_pmu__new_alias() by passing > > the 'struct pme_event' pointer. > > - Check sysfs validity before access. > > - Use pmu style event name, such as "cpu_core/cycles/". > > - Move command output two chars to the right. > > - Move pmu hybrid functions to new created pmu-hybrid.c/pmu-hybrid.h. > > This is to pass the perf test python case. > > > > Jin Yao (25): > > tools headers uapi: Update tools's copy of linux/perf_event.h > > perf jevents: Support unit value "cpu_core" and "cpu_atom" > > perf pmu: Simplify arguments of __perf_pmu__new_alias > > perf pmu: Save pmu name > > perf pmu: Save detected hybrid pmus to a global pmu list > > perf pmu: Add hybrid helper functions > > perf stat: Uniquify hybrid event name > > perf parse-events: Create two hybrid hardware events > > perf parse-events: Create two hybrid cache events > > perf parse-events: Create two hybrid raw events > > perf parse-events: Compare with hybrid pmu name > > perf parse-events: Support event inside hybrid pmu > > perf record: Create two hybrid 'cycles' events by default > > perf stat: Add default hybrid events > > perf stat: Filter out unmatched aggregation for hybrid event > > perf stat: Warn group events from different hybrid PMU > > perf record: Uniquify hybrid event name > > perf tests: Add hybrid cases for 'Parse event definition strings' test > > perf tests: Add hybrid cases for 'Roundtrip evsel->name' test > > perf tests: Skip 'Setup struct perf_event_attr' test for hybrid > > perf tests: Support 'Track with sched_switch' test for hybrid > > perf tests: Support 'Parse and process metrics' test for hybrid > > perf tests: Support 'Session topology' test for hybrid > > perf tests: Support 'Convert perf time to TSC' test for hybrid > > perf tests: Skip 'perf stat metrics (shadow stat) test' for hybrid > > > > include/uapi/linux/perf_event.h | 15 ++ > > tools/include/uapi/linux/perf_event.h | 15 ++ > > tools/perf/builtin-record.c | 47 +++++- > > tools/perf/builtin-stat.c | 29 ++++ > > tools/perf/pmu-events/jevents.c | 2 + > > tools/perf/tests/attr.c | 4 + > > tools/perf/tests/evsel-roundtrip-name.c | 19 ++- > > tools/perf/tests/parse-events.c | 152 ++++++++++++++++++ > > tools/perf/tests/parse-metric.c | 10 +- > > tools/perf/tests/perf-time-to-tsc.c | 16 ++ > > tools/perf/tests/shell/stat+shadow_stat.sh | 3 + > > tools/perf/tests/switch-tracking.c | 10 +- > > tools/perf/tests/topology.c | 10 +- > > tools/perf/util/Build | 3 + > > tools/perf/util/evlist-hybrid.c | 88 ++++++++++ > > tools/perf/util/evlist-hybrid.h | 14 ++ > > tools/perf/util/evlist.c | 5 +- > > tools/perf/util/evsel.c | 12 +- > > tools/perf/util/evsel.h | 4 +- > > tools/perf/util/parse-events-hybrid.c | 178 +++++++++++++++++++++ > > tools/perf/util/parse-events-hybrid.h | 23 +++ > > tools/perf/util/parse-events.c | 86 +++++++++- > > tools/perf/util/parse-events.h | 9 +- > > tools/perf/util/parse-events.y | 9 +- > > tools/perf/util/pmu-hybrid.c | 89 +++++++++++ > > tools/perf/util/pmu-hybrid.h | 22 +++ > > tools/perf/util/pmu.c | 64 +++++--- > > tools/perf/util/pmu.h | 7 + > > tools/perf/util/python-ext-sources | 2 + > > tools/perf/util/stat-display.c | 35 +++- > > 30 files changed, 933 insertions(+), 49 deletions(-) > > create mode 100644 tools/perf/util/evlist-hybrid.c > > create mode 100644 tools/perf/util/evlist-hybrid.h > > create mode 100644 tools/perf/util/parse-events-hybrid.c > > create mode 100644 tools/perf/util/parse-events-hybrid.h > > create mode 100644 tools/perf/util/pmu-hybrid.c > > create mode 100644 tools/perf/util/pmu-hybrid.h > > >
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