Re: [PATCH] perf stat: Fix crash on arm64

[Arnaldo Carvalho de Melo <acme@kernel.org>]

On Wed, Mar 11, 2026 at 11:50:11AM +0000, Leo Yan wrote:
> On Wed, Mar 11, 2026 at 03:21:00AM -0700, Breno Leitao wrote:
> > On Thu, Feb 05, 2026 at 10:22:27AM -0800, Ian Rogers wrote:
> > > I think it is a different issue, they have metrics while you don't.
> > > Your report does highlight we're missing a NO_JEVENTS=1 build-test,
> > > but the build is working for me. I'll send out two patches for these
> > > issues.

> > I wanted to follow up on this. Are there any next steps I should take?
 
> I can reproduce the issue on my Orion6 with setting a _dummy_ CPUID:
 
>  $ export PERF_CPUID=0x00000000410fd490
>  $ perf stat -C 5 -vvv
>  ...
>  Aborted
>  perf: util/evsel.c:2156: get_group_fd: Assertion `!(!leader->core.fd)' failed

> Because we are working on different hardwares, I am a bit suspect I
> reproduced the issue with difference sequence as yours.  Anyway, I do
> see that an event can be opened prior to its leader event, see the log
> below.
 
> Thus, your patch seems make sense to me as we need to ensure the leader
> event to be opened first.  Ian, how about you think?
 
> I have a side question (maybe this is for James :): why other arch (or
> platforms) don't have reproduce the issue?  I am wandering if any error
> or special stuffs in Arm CPU's json files.

I managed to reproduce using Leo's method:

(gdb) run stat -C 1
Starting program: /root/bin/perf stat -C 1
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/aarch64-linux-gnu/libthread_db.so.1".
Failure to read '#slots'Failure to read '#slots'Failure to read '#slots'Failure to read '#slots'
Program received signal SIGSEGV, Segmentation fault.
metricgroup__copy_metric_events (evlist=0x555555c85790, cgrp=0x0, new_metric_events=0x555555c86250, old_metric_events=0x555555c86d60) at util/metricgroup.c:1662
1662			evsel = evlist__find_evsel(evlist, old_me->evsel->core.idx);
(gdb) bt
#0  metricgroup__copy_metric_events (evlist=0x555555c85790, cgrp=0x0, new_metric_events=0x555555c86250, old_metric_events=0x555555c86d60) at util/metricgroup.c:1662
#1  0x00005555555db404 in add_default_events () at builtin-stat.c:2102
#2  0x00005555555de000 in cmd_stat (argc=0, argv=0x7ffffffffc30) at builtin-stat.c:2830
#3  0x00005555556778e0 in run_builtin (p=0x555555bd5558 <commands+360>, argc=3, argv=0x7ffffffffc30) at perf.c:348
#4  0x0000555555677b5c in handle_internal_command (argc=3, argv=0x7ffffffffc30) at perf.c:398
#5  0x0000555555677d20 in run_argv (argcp=0x7ffffffffa4c, argv=0x7ffffffffa40) at perf.c:442
#6  0x0000555555678064 in main (argc=3, argv=0x7ffffffffc30) at perf.c:549
(gdb)

acme@raspberrypi:~/git/perf-tools $ git log --no-merges --oneline -15 tools/
493ad070cbcb (HEAD -> perf-tools, tag: perf-tools-fixes-for-v7.0-2-2026-03-23, x1/perf-tools, number/perf-tools) tools headers: Synchronize linux/build_bug.h with the kernel sources
0a8b2a0857ed tools headers UAPI: Sync x86's asm/kvm.h with the kernel sources
3c71ae8ec9ad tools headers UAPI: Sync linux/kvm.h with the kernel sources
4ddd7588fae6 tools arch x86: Sync the msr-index.h copy with the kernel sources
563d39928db6 perf kvm stat: Fix relative paths for including headers
72a8b9c060d3 perf parse-events: Fix big-endian 'overwrite' by writing correct union member
8dd1d9a33532 perf metricgroup: Fix metricgroup__has_metric_or_groups()
5d4c6c132ea9 selftests/hid: fix compilation when bpf_wq and hid_device are not exported
81f86728a980 tools headers: Skip arm64 cputype.h check
e2715ea5fb35 bootconfig: Add bootconfig tests about braces
d2ea4ff1ce50 KVM: selftests: Verify SEV+ guests can read and write EFER, CR0, CR4, and CR8
146c9ab38b48 powerpc/selftests/copyloops: extend selftest to exercise __copy_tofrom_user_power7_vmx
68e76fc12df0 selftests: rtnetlink: add neighbour update test
35b16a7a2c4f (tag: perf-tools-fixes-for-v7.0-1-2026-03-13, five/perf-tools) perf synthetic-events: Fix stale build ID in module MMAP2 records
3e745694b032 selftests: kvm: add a test that VMX validates controls on RSM
acme@raspberrypi:~/git/perf-tools $

Below goes the full -vvv log FWIW.

- Arnaldo

root@raspberrypi:~# export PERF_CPUID=0x00000000410fd490
root@raspberrypi:~# perf stat -C 1 -vvv
Using CPUID 0x00000000410fd490
metric expr 100 * (STALL_SLOT_BACKEND / (CPU_CYCLES * #slots) - BR_MIS_PRED * 3 / CPU_CYCLES) for backend_bound
parsing metric: 100 * (STALL_SLOT_BACKEND / (CPU_CYCLES * #slots) - BR_MIS_PRED * 3 / CPU_CYCLES)
Failure to read '#slots'literal: #slots = nan
syntax error
metric expr 100 * ((1 - OP_RETIRED / OP_SPEC) * (1 - (STALL_SLOT if strcmp_cpuid_str(0x410fd493) | strcmp_cpuid_str(0x410fd490) ^ 1 else STALL_SLOT - CPU_CYCLES) / (CPU_CYCLES * #slots)) + BR_MIS_PRED * 4 / CPU_CYCLES) for bad_speculation
parsing metric: 100 * ((1 - OP_RETIRED / OP_SPEC) * (1 - (STALL_SLOT if strcmp_cpuid_str(0x410fd493) | strcmp_cpuid_str(0x410fd490) ^ 1 else STALL_SLOT - CPU_CYCLES) / (CPU_CYCLES * #slots)) + BR_MIS_PRED * 4 / CPU_CYCLES)
Failure to read '#slots'literal: #slots = nan
syntax error
metric expr 100 * ((STALL_SLOT_FRONTEND if strcmp_cpuid_str(0x410fd493) | strcmp_cpuid_str(0x410fd490) ^ 1 else STALL_SLOT_FRONTEND - CPU_CYCLES) / (CPU_CYCLES * #slots) - BR_MIS_PRED / CPU_CYCLES) for frontend_bound
parsing metric: 100 * ((STALL_SLOT_FRONTEND if strcmp_cpuid_str(0x410fd493) | strcmp_cpuid_str(0x410fd490) ^ 1 else STALL_SLOT_FRONTEND - CPU_CYCLES) / (CPU_CYCLES * #slots) - BR_MIS_PRED / CPU_CYCLES)
Failure to read '#slots'literal: #slots = nan
syntax error
metric expr 100 * (OP_RETIRED / OP_SPEC * (1 - (STALL_SLOT if strcmp_cpuid_str(0x410fd493) | strcmp_cpuid_str(0x410fd490) ^ 1 else STALL_SLOT - CPU_CYCLES) / (CPU_CYCLES * #slots))) for retiring
parsing metric: 100 * (OP_RETIRED / OP_SPEC * (1 - (STALL_SLOT if strcmp_cpuid_str(0x410fd493) | strcmp_cpuid_str(0x410fd490) ^ 1 else STALL_SLOT - CPU_CYCLES) / (CPU_CYCLES * #slots)))
Failure to read '#slots'literal: #slots = nan
syntax error
metric expr (software@cpu\-clock\,name\=cpu\-clock@ if #target_cpu else software@task\-clock\,name\=task\-clock@) / (duration_time * 1e9) for CPUs_utilized
parsing metric: (software@cpu\-clock\,name\=cpu\-clock@ if #target_cpu else software@task\-clock\,name\=task\-clock@) / (duration_time * 1e9)
literal: #target_cpu = 1.000000
metric expr stalled\-cycles\-backend / cpu\-cycles for backend_cycles_idle
parsing metric: backend_cycles_idle
metric expr stalled\-cycles\-backend / cpu\-cycles for backend_cycles_idle
parsing metric: stalled\-cycles\-backend / cpu\-cycles
metric expr branches / (software@cpu\-clock\,name\=cpu\-clock@ if #target_cpu else software@task\-clock\,name\=task\-clock@) for branch_frequency
parsing metric: branches / (software@cpu\-clock\,name\=cpu\-clock@ if #target_cpu else software@task\-clock\,name\=task\-clock@)
literal: #target_cpu = 1.000000
metric expr branch\-misses / branches for branch_miss_rate
parsing metric: branch_miss_rate
metric expr branch\-misses / branches for branch_miss_rate
parsing metric: branch\-misses / branches
metric expr software@context\-switches\,name\=context\-switches@ * 1e9 / (software@cpu\-clock\,name\=cpu\-clock@ if #target_cpu else software@task\-clock\,name\=task\-clock@) for cs_per_second
parsing metric: software@context\-switches\,name\=context\-switches@ * 1e9 / (software@cpu\-clock\,name\=cpu\-clock@ if #target_cpu else software@task\-clock\,name\=task\-clock@)
literal: #target_cpu = 1.000000
metric expr cpu\-cycles / (software@cpu\-clock\,name\=cpu\-clock@ if #target_cpu else software@task\-clock\,name\=task\-clock@) for cycles_frequency
parsing metric: cpu\-cycles / (software@cpu\-clock\,name\=cpu\-clock@ if #target_cpu else software@task\-clock\,name\=task\-clock@)
literal: #target_cpu = 1.000000
metric expr stalled\-cycles\-frontend / cpu\-cycles for frontend_cycles_idle
parsing metric: frontend_cycles_idle
metric expr stalled\-cycles\-frontend / cpu\-cycles for frontend_cycles_idle
parsing metric: stalled\-cycles\-frontend / cpu\-cycles
metric expr instructions / cpu\-cycles for insn_per_cycle
parsing metric: insn_per_cycle
metric expr instructions / cpu\-cycles for insn_per_cycle
parsing metric: instructions / cpu\-cycles
metric expr software@cpu\-migrations\,name\=cpu\-migrations@ * 1e9 / (software@cpu\-clock\,name\=cpu\-clock@ if #target_cpu else software@task\-clock\,name\=task\-clock@) for migrations_per_second
parsing metric: software@cpu\-migrations\,name\=cpu\-migrations@ * 1e9 / (software@cpu\-clock\,name\=cpu\-clock@ if #target_cpu else software@task\-clock\,name\=task\-clock@)
literal: #target_cpu = 1.000000
metric expr software@page\-faults\,name\=page\-faults@ * 1e9 / (software@cpu\-clock\,name\=cpu\-clock@ if #target_cpu else software@task\-clock\,name\=task\-clock@) for page_faults_per_second
parsing metric: software@page\-faults\,name\=page\-faults@ * 1e9 / (software@cpu\-clock\,name\=cpu\-clock@ if #target_cpu else software@task\-clock\,name\=task\-clock@)
literal: #target_cpu = 1.000000
metric expr max(stalled\-cycles\-frontend, stalled\-cycles\-backend) / instructions for stalled_cycles_per_instruction
parsing metric: max(stalled\-cycles\-frontend, stalled\-cycles\-backend) / instructions
found event software@context-switches,name=context-switches@
found event duration_time
found event software@page-faults,name=page-faults@
found event cpu-cycles
found event branches
found event software@cpu-migrations,name=cpu-migrations@
found event software@cpu-clock,name=cpu-clock@
Parsing metric events 'software/context-switches,name=context-switches,metric-id=software!3context!1switches!0name!2context!1switches!3/,software/page-faults,name=page-faults,metric-id=software!3page!1faults!0name!2page!1faults!3/,cpu-cycles/metric-id=cpu!1cycles/,branches/metric-id=branches/,software/cpu-migrations,name=cpu-migrations,metric-id=software!3cpu!1migrations!0name!2cpu!1migrations!3/,software/cpu-clock,name=cpu-clock,metric-id=software!3cpu!1clock!0name!2cpu!1clock!3/,duration_time'
Attempt to add: software/context-switches,name=context-switches,metric-id=software!3context!1switches!0name!2context!1switches!3/
..after resolving event: software/config=0x3,name=context-switches,metric-id=software!3context!1switches!0name!2context!1switches!3/
Attempt to add: software/page-faults,name=page-faults,metric-id=software!3page!1faults!0name!2page!1faults!3/
..after resolving event: software/config=0x2,name=page-faults,metric-id=software!3page!1faults!0name!2page!1faults!3/
hwmon_pmu: not a hwmon file 'cpu-cycles'
Attempt to add: armv8_cortex_a76/metric-id=cpu!1cycles,cpu-cycles/
..after resolving event: armv8_cortex_a76/metric-id=cpu!1cycles,legacy-hardware-config=0/
cpu-cycles -> armv8_cortex_a76/metric-id=cpu!1cycles,cpu-cycles/
hwmon_pmu: not a hwmon file 'cpu-cycles'
hwmon_pmu: not a hwmon file 'cpu-cycles'
hwmon_pmu: not a hwmon file 'cpu-cycles'
hwmon_pmu: not a hwmon file 'cpu-cycles'
hwmon_pmu: not a hwmon file 'cpu-cycles'
hwmon_pmu: not a hwmon file 'branches'
Attempt to add: armv8_cortex_a76/metric-id=branches,branches/
..after resolving event: armv8_cortex_a76/metric-id=branches,legacy-hardware-config=0x4/
branches -> armv8_cortex_a76/metric-id=branches,branches/
hwmon_pmu: not a hwmon file 'branches'
hwmon_pmu: not a hwmon file 'branches'
hwmon_pmu: not a hwmon file 'branches'
hwmon_pmu: not a hwmon file 'branches'
hwmon_pmu: not a hwmon file 'branches'
Attempt to add: software/cpu-migrations,name=cpu-migrations,metric-id=software!3cpu!1migrations!0name!2cpu!1migrations!3/
..after resolving event: software/config=0x4,name=cpu-migrations,metric-id=software!3cpu!1migrations!0name!2cpu!1migrations!3/
Attempt to add: software/cpu-clock,name=cpu-clock,metric-id=software!3cpu!1clock!0name!2cpu!1clock!3/
..after resolving event: software/config=0,name=cpu-clock,metric-id=software!3cpu!1clock!0name!2cpu!1clock!3/
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
Attempt to add: tool/duration_time/
..after resolving event: tool/config=0x1/
duration_time -> tool/duration_time/
found event duration_time
Parsing metric events 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
Attempt to add: tool/duration_time/
..after resolving event: tool/config=0x1/
duration_time -> tool/duration_time/
Matched metric-id duration_time to duration_time
Events in 'frontend_bound' fully contained within 'retiring'
Events in 'bad_speculation' fully contained within 'retiring'
Events in 'backend_bound' fully contained within 'retiring'
found event duration_time
found event stalled-cycles-backend
found event instructions
found event stalled-cycles-frontend
Parsing metric events '{stalled-cycles-backend/metric-id=stalled!1cycles!1backend/,instructions/metric-id=instructions/,stalled-cycles-frontend/metric-id=stalled!1cycles!1frontend/}:W,duration_time'
hwmon_pmu: not a hwmon file 'stalled-cycles-backend'
Attempt to add: armv8_cortex_a76/metric-id=stalled!1cycles!1backend,stalled-cycles-backend/
..after resolving event: armv8_cortex_a76/metric-id=stalled!1cycles!1backend,legacy-hardware-config=0x8/
stalled-cycles-backend -> armv8_cortex_a76/metric-id=stalled!1cycles!1backend,stalled-cycles-backend/
hwmon_pmu: not a hwmon file 'stalled-cycles-backend'
hwmon_pmu: not a hwmon file 'stalled-cycles-backend'
hwmon_pmu: not a hwmon file 'stalled-cycles-backend'
hwmon_pmu: not a hwmon file 'stalled-cycles-backend'
hwmon_pmu: not a hwmon file 'stalled-cycles-backend'
hwmon_pmu: not a hwmon file 'instructions'
Attempt to add: armv8_cortex_a76/metric-id=instructions,instructions/
..after resolving event: armv8_cortex_a76/metric-id=instructions,legacy-hardware-config=0x1/
instructions -> armv8_cortex_a76/metric-id=instructions,instructions/
hwmon_pmu: not a hwmon file 'instructions'
hwmon_pmu: not a hwmon file 'instructions'
hwmon_pmu: not a hwmon file 'instructions'
hwmon_pmu: not a hwmon file 'instructions'
hwmon_pmu: not a hwmon file 'instructions'
hwmon_pmu: not a hwmon file 'stalled-cycles-frontend'
Attempt to add: armv8_cortex_a76/metric-id=stalled!1cycles!1frontend,stalled-cycles-frontend/
..after resolving event: armv8_cortex_a76/metric-id=stalled!1cycles!1frontend,legacy-hardware-config=0x7/
stalled-cycles-frontend -> armv8_cortex_a76/metric-id=stalled!1cycles!1frontend,stalled-cycles-frontend/
hwmon_pmu: not a hwmon file 'stalled-cycles-frontend'
hwmon_pmu: not a hwmon file 'stalled-cycles-frontend'
hwmon_pmu: not a hwmon file 'stalled-cycles-frontend'
hwmon_pmu: not a hwmon file 'stalled-cycles-frontend'
hwmon_pmu: not a hwmon file 'stalled-cycles-frontend'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
Attempt to add: tool/duration_time/
..after resolving event: tool/config=0x1/
duration_time -> tool/duration_time/
Matched metric-id stalled-cycles-backend to stalled-cycles-backend
Matched metric-id instructions to instructions
Matched metric-id stalled-cycles-frontend to stalled-cycles-frontend
Matched metric-id duration_time to duration_time
Matched metric-id software@page-faults,name=page-faults@ to page-faults
Matched metric-id software@cpu-clock,name=cpu-clock@ to cpu-clock
Matched metric-id software@cpu-migrations,name=cpu-migrations@ to cpu-migrations
Matched metric-id software@cpu-clock,name=cpu-clock@ to cpu-clock
found event duration_time
found event cpu-cycles
found event instructions
Parsing metric events '{cpu-cycles/metric-id=cpu!1cycles/,instructions/metric-id=instructions/}:W,duration_time'
hwmon_pmu: not a hwmon file 'cpu-cycles'
Attempt to add: armv8_cortex_a76/metric-id=cpu!1cycles,cpu-cycles/
..after resolving event: armv8_cortex_a76/metric-id=cpu!1cycles,legacy-hardware-config=0/
cpu-cycles -> armv8_cortex_a76/metric-id=cpu!1cycles,cpu-cycles/
hwmon_pmu: not a hwmon file 'cpu-cycles'
hwmon_pmu: not a hwmon file 'cpu-cycles'
hwmon_pmu: not a hwmon file 'cpu-cycles'
hwmon_pmu: not a hwmon file 'cpu-cycles'
hwmon_pmu: not a hwmon file 'cpu-cycles'
hwmon_pmu: not a hwmon file 'instructions'
Attempt to add: armv8_cortex_a76/metric-id=instructions,instructions/
..after resolving event: armv8_cortex_a76/metric-id=instructions,legacy-hardware-config=0x1/
instructions -> armv8_cortex_a76/metric-id=instructions,instructions/
hwmon_pmu: not a hwmon file 'instructions'
hwmon_pmu: not a hwmon file 'instructions'
hwmon_pmu: not a hwmon file 'instructions'
hwmon_pmu: not a hwmon file 'instructions'
hwmon_pmu: not a hwmon file 'instructions'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
Attempt to add: tool/duration_time/
..after resolving event: tool/config=0x1/
duration_time -> tool/duration_time/
Matched metric-id cpu-cycles to cpu-cycles
Matched metric-id instructions to instructions
Matched metric-id duration_time to duration_time
found event duration_time
found event cpu-cycles
found event stalled-cycles-frontend
Parsing metric events '{cpu-cycles/metric-id=cpu!1cycles/,stalled-cycles-frontend/metric-id=stalled!1cycles!1frontend/}:W,duration_time'
hwmon_pmu: not a hwmon file 'cpu-cycles'
Attempt to add: armv8_cortex_a76/metric-id=cpu!1cycles,cpu-cycles/
..after resolving event: armv8_cortex_a76/metric-id=cpu!1cycles,legacy-hardware-config=0/
cpu-cycles -> armv8_cortex_a76/metric-id=cpu!1cycles,cpu-cycles/
hwmon_pmu: not a hwmon file 'cpu-cycles'
hwmon_pmu: not a hwmon file 'cpu-cycles'
hwmon_pmu: not a hwmon file 'cpu-cycles'
hwmon_pmu: not a hwmon file 'cpu-cycles'
hwmon_pmu: not a hwmon file 'cpu-cycles'
hwmon_pmu: not a hwmon file 'stalled-cycles-frontend'
Attempt to add: armv8_cortex_a76/metric-id=stalled!1cycles!1frontend,stalled-cycles-frontend/
..after resolving event: armv8_cortex_a76/metric-id=stalled!1cycles!1frontend,legacy-hardware-config=0x7/
stalled-cycles-frontend -> armv8_cortex_a76/metric-id=stalled!1cycles!1frontend,stalled-cycles-frontend/
hwmon_pmu: not a hwmon file 'stalled-cycles-frontend'
hwmon_pmu: not a hwmon file 'stalled-cycles-frontend'
hwmon_pmu: not a hwmon file 'stalled-cycles-frontend'
hwmon_pmu: not a hwmon file 'stalled-cycles-frontend'
hwmon_pmu: not a hwmon file 'stalled-cycles-frontend'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
Attempt to add: tool/duration_time/
..after resolving event: tool/config=0x1/
duration_time -> tool/duration_time/
Matched metric-id cpu-cycles to cpu-cycles
Matched metric-id stalled-cycles-frontend to stalled-cycles-frontend
Matched metric-id duration_time to duration_time
Matched metric-id cpu-cycles to cpu-cycles
Matched metric-id software@cpu-clock,name=cpu-clock@ to cpu-clock
Matched metric-id software@context-switches,name=context-switches@ to context-switches
Matched metric-id software@cpu-clock,name=cpu-clock@ to cpu-clock
found event duration_time
found event branch-misses
found event branches
Parsing metric events '{branch-misses/metric-id=branch!1misses/,branches/metric-id=branches/}:W,duration_time'
hwmon_pmu: not a hwmon file 'branch-misses'
Attempt to add: armv8_cortex_a76/metric-id=branch!1misses,branch-misses/
..after resolving event: armv8_cortex_a76/metric-id=branch!1misses,legacy-hardware-config=0x5/
branch-misses -> armv8_cortex_a76/metric-id=branch!1misses,branch-misses/
hwmon_pmu: not a hwmon file 'branch-misses'
hwmon_pmu: not a hwmon file 'branch-misses'
hwmon_pmu: not a hwmon file 'branch-misses'
hwmon_pmu: not a hwmon file 'branch-misses'
hwmon_pmu: not a hwmon file 'branch-misses'
hwmon_pmu: not a hwmon file 'branches'
Attempt to add: armv8_cortex_a76/metric-id=branches,branches/
..after resolving event: armv8_cortex_a76/metric-id=branches,legacy-hardware-config=0x4/
branches -> armv8_cortex_a76/metric-id=branches,branches/
hwmon_pmu: not a hwmon file 'branches'
hwmon_pmu: not a hwmon file 'branches'
hwmon_pmu: not a hwmon file 'branches'
hwmon_pmu: not a hwmon file 'branches'
hwmon_pmu: not a hwmon file 'branches'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
Attempt to add: tool/duration_time/
..after resolving event: tool/config=0x1/
duration_time -> tool/duration_time/
Matched metric-id branch-misses to branch-misses
Matched metric-id branches to branches
Matched metric-id duration_time to duration_time
Matched metric-id branches to branches
Matched metric-id software@cpu-clock,name=cpu-clock@ to cpu-clock
found event duration_time
found event cpu-cycles
found event stalled-cycles-backend
Parsing metric events '{cpu-cycles/metric-id=cpu!1cycles/,stalled-cycles-backend/metric-id=stalled!1cycles!1backend/}:W,duration_time'
hwmon_pmu: not a hwmon file 'cpu-cycles'
Attempt to add: armv8_cortex_a76/metric-id=cpu!1cycles,cpu-cycles/
..after resolving event: armv8_cortex_a76/metric-id=cpu!1cycles,legacy-hardware-config=0/
cpu-cycles -> armv8_cortex_a76/metric-id=cpu!1cycles,cpu-cycles/
hwmon_pmu: not a hwmon file 'cpu-cycles'
hwmon_pmu: not a hwmon file 'cpu-cycles'
hwmon_pmu: not a hwmon file 'cpu-cycles'
hwmon_pmu: not a hwmon file 'cpu-cycles'
hwmon_pmu: not a hwmon file 'cpu-cycles'
hwmon_pmu: not a hwmon file 'stalled-cycles-backend'
Attempt to add: armv8_cortex_a76/metric-id=stalled!1cycles!1backend,stalled-cycles-backend/
..after resolving event: armv8_cortex_a76/metric-id=stalled!1cycles!1backend,legacy-hardware-config=0x8/
stalled-cycles-backend -> armv8_cortex_a76/metric-id=stalled!1cycles!1backend,stalled-cycles-backend/
hwmon_pmu: not a hwmon file 'stalled-cycles-backend'
hwmon_pmu: not a hwmon file 'stalled-cycles-backend'
hwmon_pmu: not a hwmon file 'stalled-cycles-backend'
hwmon_pmu: not a hwmon file 'stalled-cycles-backend'
hwmon_pmu: not a hwmon file 'stalled-cycles-backend'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
hwmon_pmu: not a hwmon type 'duration' in file name 'duration_time'
Attempt to add: tool/duration_time/
..after resolving event: tool/config=0x1/
duration_time -> tool/duration_time/
Matched metric-id cpu-cycles to cpu-cycles
Matched metric-id stalled-cycles-backend to stalled-cycles-backend
Matched metric-id duration_time to duration_time
Matched metric-id software@cpu-clock,name=cpu-clock@ to cpu-clock
Matched metric-id duration_time to duration_time
Segmentation fault
root@raspberrypi:~#