Messages in this thread | | | Date | Thu, 8 Apr 2021 14:06:37 +0200 | From | Jiri Olsa <> | Subject | Re: [PATCH v3 0/6] perf arm64 metricgroup support |
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On Wed, Apr 07, 2021 at 06:32:44PM +0800, John Garry wrote: > This series contains support to get basic metricgroups working for > arm64 CPUs. > > Initial support is added for HiSilicon hip08 platform. > > Some sample usage on Huawei D06 board: > > $ ./perf list metric > > List of pre-defined events (to be used in -e): > > Metrics: > > bp_misp_flush > [BP misp flush L3 topdown metric] > branch_mispredicts > [Branch mispredicts L2 topdown metric] > core_bound > [Core bound L2 topdown metric] > divider > [Divider L3 topdown metric] > exe_ports_util > [EXE ports util L3 topdown metric] > fetch_bandwidth_bound > [Fetch bandwidth bound L2 topdown metric] > fetch_latency_bound > [Fetch latency bound L2 topdown metric] > fsu_stall > [FSU stall L3 topdown metric] > idle_by_icache_miss > > $ sudo ./perf stat -v -M core_bound sleep 1 > Using CPUID 0x00000000480fd010 > metric expr (exe_stall_cycle - (mem_stall_anyload + armv8_pmuv3_0@event\=0x7005@)) / cpu_cycles for core_bound > found event cpu_cycles > found event armv8_pmuv3_0/event=0x7005/ > found event exe_stall_cycle > found event mem_stall_anyload > adding {cpu_cycles -> armv8_pmuv3_0/event=0x7001/ > mem_stall_anyload -> armv8_pmuv3_0/event=0x7004/ > Control descriptor is not initialized > cpu_cycles: 989433 385050 385050 > armv8_pmuv3_0/event=0x7005/: 19207 385050 385050 > exe_stall_cycle: 900825 385050 385050 > mem_stall_anyload: 253516 385050 385050 > > Performance counter stats for 'sleep': > > 989,433 cpu_cycles # 0.63 core_bound > 19,207 armv8_pmuv3_0/event=0x7005/ > 900,825 exe_stall_cycle > 253,516 mem_stall_anyload > > 0.000805809 seconds time elapsed > > 0.000875000 seconds user > 0.000000000 seconds sys > > perf stat --topdown is not supported, as this requires the CPU PMU to > expose (alias) events for the TopDown L1 metrics from sysfs, which arm > does not do. To get that to work, we probably need to make perf use the > pmu-events cpumap to learn about those alias events. > > Metric reuse support is added for pmu-events parse metric testcase. > This had been broken on power9 recently: > https://lore.kernel.org/lkml/20210324015418.GC8931@li-24c3614c-2adc-11b2-a85c-85f334518bdb.ibm.com/ > > Differences to v2: > - Add TB and RB tags (Thanks!) > - Rename metricgroup__find_metric() from metricgroup_find_metric() > - Change resolve_metric_simple() to rescan after any insert
Acked-by: Jiri Olsa <jolsa@redhat.com>
thanks, jirka
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