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Message-ID: <aYXPZfaO7Sa80iIM@gmail.com>
Date: Fri, 6 Feb 2026 04:01:19 -0800
From: Breno Leitao <leitao@...ian.org>
To: Ian Rogers <irogers@...gle.com>
Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
Mark Rutland <mark.rutland@....com>, Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Jiri Olsa <jolsa@...nel.org>, Adrian Hunter <adrian.hunter@...el.com>,
James Clark <james.clark@...aro.org>, linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
kernel-team@...a.com, Denis Yaroshevskiy <dyaroshev@...a.com>
Subject: Re: [PATCH] perf stat: Fix crash on arm64
Hello Ian, thanks for the quick reply!
On Thu, Feb 05, 2026 at 08:59:07AM -0800, Ian Rogers wrote:
> On Thu, Feb 5, 2026 at 3:46 AM Breno Leitao <leitao@...ian.org> wrote:
> >
> > Perf stat is crashing on arm64 hosts with the following issue:
> >
> > # make -C tools/perf DEBUG=1
> > # perf stat sleep 1
> > perf: util/evsel.c:2034: get_group_fd: Assertion `!(!leader->core.fd)' failed.
> > [1] 1220794 IOT instruction (core dumped) ./perf stat
> >
> > The sorting function introduced by commit a745c0831c15c ("perf stat:
> > Sort default events/metrics") compares events based on their individual
> > properties. This can cause events from different groups to be
> > interleaved, resulting in group members appearing before their leaders
> > in the sorted evlist.
>
> Hi, sorry for the issue. I can see what you're saying but why is this
> an arm64 issue?
Sorry, It's not ARM64-specific - the bug is in the generic sort code.
It just happens to manifest on ARM64.
> The legacy Default metrics are common to all
> architectures:
> https://web.git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next.git/tree/tools/perf/pmu-events/arch/common/common/metrics.json?h=perf-tools-next
>
> > When the iterator opens events in list order, a group member may be
> > processed before its leader has been opened.
> >
> > For example, CPU_CYCLES (idx=32) with leader STALL_SLOT_BACKEND (idx=37)
> > could be sorted before its leader, causing the crash when CPU_CYCLES
> > tries to get its group fd from the not-yet-opened leader.
>
> Which metric is this?
These are ARM neoverse metrics, they can be found in
tools/perf/pmu-events/arch/arm64/arm/neoverse-n*
> > Fix this by comparing events based on their leader's attributes instead
> > of their own attributes when the events are in different groups. This
> > ensures all members of a group share the same sort key as their leader,
> > keeping groups together and guaranteeing leaders are opened before their
> > members.
>
> This makes sense but I'm not understanding why this problem wasn't
> seen previously. I'm guessing that in a metric like
> backend_cycles_idle:
> https://web.git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next.git/tree/tools/perf/pmu-events/arch/common/common/metrics.json?h=perf-tools-next#n63
> ```
> "BriefDescription": "Backend stalls per cycle",
> "MetricExpr": "stalled\\-cycles\\-backend / cpu\\-cycles",
> "MetricGroup": "Default",
> "MetricName": "backend_cycles_idle",
> "MetricThreshold": "backend_cycles_idle > 0.2",
> "DefaultShowEvents": "1"
> ```
I was able to limit this to the following json:
[
{
"ArchStdEvent": "backend_bound",
"MetricExpr": "(100 * ((STALL_SLOT_BACKEND / (CPU_CYCLES * #slots)) - ((BR_MIS_PRED * 3) / CPU_CYCLES)))"
},
{
"ArchStdEvent": "frontend_bound",
"MetricExpr": "(100 * (((STALL_SLOT_FRONTEND) / (CPU_CYCLES * #slots)) - (BR_MIS_PRED / CPU_CYCLES)))"
}
]
and then
# ./tools/perf/perf stat -v sleep 0.01
Using CPUID 0x00000000410fd4f0
metric expr 100 * (STALL_SLOT_BACKEND / (CPU_CYCLES * #slots) - BR_MIS_PRED * 3 / CPU_CYCLES) for backend_bound
metric expr 100 * (STALL_SLOT_FRONTEND / (CPU_CYCLES * #slots) - BR_MIS_PRED / CPU_CYCLES) for frontend_bound
metric expr (software@cpu\-clock\,name\=cpu\-clock@ if #target_cpu else software@...k\-clock\,name\=task\-clock@) / (duration_time * 1e9) for CPUs_utilized
metric expr stalled\-cycles\-backend / cpu\-cycles for backend_cycles_idle
metric expr stalled\-cycles\-backend / cpu\-cycles for backend_cycles_idle
metric expr branches / (software@cpu\-clock\,name\=cpu\-clock@ if #target_cpu else software@...k\-clock\,name\=task\-clock@) for branch_frequency
metric expr branch\-misses / branches for branch_miss_rate
metric expr branch\-misses / branches for branch_miss_rate
metric expr software@...text\-switches\,name\=context\-switches@ * 1e9 / (software@cpu\-clock\,name\=cpu\-clock@ if #target_cpu else software@...k\-clock\,name\=task\-clock@) for cs_per_second
metric expr cpu\-cycles / (software@cpu\-clock\,name\=cpu\-clock@ if #target_cpu else software@...k\-clock\,name\=task\-clock@) for cycles_frequency
metric expr stalled\-cycles\-frontend / cpu\-cycles for frontend_cycles_idle
metric expr stalled\-cycles\-frontend / cpu\-cycles for frontend_cycles_idle
metric expr instructions / cpu\-cycles for insn_per_cycle
metric expr instructions / cpu\-cycles for insn_per_cycle
metric expr software@cpu\-migrations\,name\=cpu\-migrations@ * 1e9 / (software@cpu\-clock\,name\=cpu\-clock@ if #target_cpu else software@...k\-clock\,name\=task\-clock@) for migrations_per_second
metric expr software@...e\-faults\,name\=page\-faults@ * 1e9 / (software@cpu\-clock\,name\=cpu\-clock@ if #target_cpu else software@...k\-clock\,name\=task\-clock@) for page_faults_per_second
metric expr max(stalled\-cycles\-frontend, stalled\-cycles\-backend) / instructions for stalled_cycles_per_instruction
hwmon_pmu: failure to open '/sys/class/hwmon/hwmon4/name'
hwmon_pmu: failure to open '/sys/class/hwmon/hwmon5/name'
hwmon_pmu: failure to open '/sys/class/hwmon/hwmon3/name'
found event software@...text-switches,name=context-switches@
found event duration_time
found event software@...e-faults,name=page-faults@
found event software@...k-clock,name=task-clock@
found event cpu-cycles
found event branches
found event software@...-migrations,name=cpu-migrations@
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/,software/task-clock,name=task-clock,metric-id=software!3task!1clock!0name!2task!1clock!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/,duration_time'
cpu-cycles -> armv8_pmuv3_0/metric-id=cpu!1cycles,cpu-cycles/
branches -> armv8_pmuv3_0/metric-id=branches,branches/
duration_time -> tool/duration_time/
found event STALL_SLOT_FRONTEND
found event duration_time
found event BR_MIS_PRED
found event CPU_CYCLES
Parsing metric events '{STALL_SLOT_FRONTEND/metric-id=STALL_SLOT_FRONTEND/,BR_MIS_PRED/metric-id=BR_MIS_PRED/,CPU_CYCLES/metric-id=CPU_CYCLES/}:W,duration_time'
STALL_SLOT_FRONTEND -> armv8_pmuv3_0/metric-id=STALL_SLOT_FRONTEND,STALL_SLOT_FRONTEND/
BR_MIS_PRED -> armv8_pmuv3_0/metric-id=BR_MIS_PRED,BR_MIS_PRED/
CPU_CYCLES -> armv8_pmuv3_0/metric-id=CPU_CYCLES,CPU_CYCLES/
duration_time -> tool/duration_time/
Matched metric-id STALL_SLOT_FRONTEND to STALL_SLOT_FRONTEND
Matched metric-id BR_MIS_PRED to BR_MIS_PRED
Matched metric-id CPU_CYCLES to CPU_CYCLES
Matched metric-id duration_time to duration_time
found event STALL_SLOT_BACKEND
found event duration_time
found event BR_MIS_PRED
found event CPU_CYCLES
Parsing metric events '{STALL_SLOT_BACKEND/metric-id=STALL_SLOT_BACKEND/,BR_MIS_PRED/metric-id=BR_MIS_PRED/,CPU_CYCLES/metric-id=CPU_CYCLES/}:W,duration_time'
STALL_SLOT_BACKEND -> armv8_pmuv3_0/metric-id=STALL_SLOT_BACKEND,STALL_SLOT_BACKEND/
BR_MIS_PRED -> armv8_pmuv3_0/metric-id=BR_MIS_PRED,BR_MIS_PRED/
CPU_CYCLES -> armv8_pmuv3_0/metric-id=CPU_CYCLES,CPU_CYCLES/
duration_time -> tool/duration_time/
Matched metric-id STALL_SLOT_BACKEND to STALL_SLOT_BACKEND
Matched metric-id BR_MIS_PRED to BR_MIS_PRED
Matched metric-id CPU_CYCLES to CPU_CYCLES
Matched metric-id duration_time to duration_time
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'
stalled-cycles-backend -> armv8_pmuv3_0/metric-id=stalled!1cycles!1backend,stalled-cycles-backend/
instructions -> armv8_pmuv3_0/metric-id=instructions,instructions/
stalled-cycles-frontend -> armv8_pmuv3_0/metric-id=stalled!1cycles!1frontend,stalled-cycles-frontend/
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@...e-faults,name=page-faults@ to page-faults
Matched metric-id software@...k-clock,name=task-clock@ to task-clock
Matched metric-id software@...k-clock,name=task-clock@ to task-clock
Matched metric-id software@...-migrations,name=cpu-migrations@ to cpu-migrations
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'
cpu-cycles -> armv8_pmuv3_0/metric-id=cpu!1cycles,cpu-cycles/
instructions -> armv8_pmuv3_0/metric-id=instructions,instructions/
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'
cpu-cycles -> armv8_pmuv3_0/metric-id=cpu!1cycles,cpu-cycles/
stalled-cycles-frontend -> armv8_pmuv3_0/metric-id=stalled!1cycles!1frontend,stalled-cycles-frontend/
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 software@...k-clock,name=task-clock@ to task-clock
Matched metric-id cpu-cycles to cpu-cycles
Matched metric-id software@...text-switches,name=context-switches@ to context-switches
Matched metric-id software@...k-clock,name=task-clock@ to task-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'
branch-misses -> armv8_pmuv3_0/metric-id=branch!1misses,branch-misses/
branches -> armv8_pmuv3_0/metric-id=branches,branches/
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 software@...k-clock,name=task-clock@ to task-clock
Matched metric-id branches to branches
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'
cpu-cycles -> armv8_pmuv3_0/metric-id=cpu!1cycles,cpu-cycles/
stalled-cycles-backend -> armv8_pmuv3_0/metric-id=stalled!1cycles!1backend,stalled-cycles-backend/
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@...k-clock,name=task-clock@ to task-clock
Matched metric-id duration_time to duration_time
copying metric event for cgroup 'root': context-switches (idx=0)
copying metric event for cgroup 'root': page-faults (idx=1)
copying metric event for cgroup 'root': task-clock (idx=2)
copying metric event for cgroup 'root': cpu-cycles (idx=3)
copying metric event for cgroup 'root': branches (idx=4)
copying metric event for cgroup 'root': cpu-migrations (idx=5)
copying metric event for cgroup 'root': STALL_SLOT_FRONTEND (idx=7)
copying metric event for cgroup 'root': stalled-cycles-backend (idx=29)
copying metric event for cgroup 'root': STALL_SLOT_BACKEND (idx=11)
copying metric event for cgroup 'root': stalled-cycles-backend (idx=15)
copying metric event for cgroup 'root': instructions (idx=20)
copying metric event for cgroup 'root': stalled-cycles-frontend (idx=23)
copying metric event for cgroup 'root': branch-misses (idx=25)
copying metric event for cgroup 'root': context-switches (idx=6)
copying metric event for cgroup 'root': page-faults (idx=8)
copying metric event for cgroup 'root': task-clock (idx=9)
copying metric event for cgroup 'root': cpu-cycles (idx=13)
copying metric event for cgroup 'root': branches (idx=12)
copying metric event for cgroup 'root': cpu-migrations (idx=7)
copying metric event for cgroup 'root': STALL_SLOT_FRONTEND (idx=25)
copying metric event for cgroup 'root': stalled-cycles-backend (idx=19)
copying metric event for cgroup 'root': STALL_SLOT_BACKEND (idx=29)
copying metric event for cgroup 'root': stalled-cycles-backend (idx=20)
copying metric event for cgroup 'root': instructions (idx=15)
copying metric event for cgroup 'root': stalled-cycles-frontend (idx=17)
copying metric event for cgroup 'root': branch-misses (idx=10)
Control descriptor is not initialized
perf: util/evsel.c:2034: get_group_fd: Assertion `!(!leader->core.fd)' failed.
[1] 832866 IOT instruction (core dumped) ./tools/perf/perf stat -v sleep 0.01
> The PMUs for cpu-cycles and stalled-cycles differ? This may mean we
> also need to be smarting in determining PMUs for legacy events.
>
> It'd be interesting to see what events are coming from the kernel, e.g.:
> ```
> $ ls /sys/bus/event_source/devices/*/events
# ls /sys/bus/event_source/devices/*/events
/sys/bus/event_source/devices/armv8_pmuv3_0/events:
br_mis_pred cti_trigout7 l1d_tlb_refill l2d_tlb_refill mem_access_checked_wr stall_backend_mem
br_mis_pred_retired dtlb_walk l1i_cache l3d_cache memory_error stall_frontend
br_pred exc_return l1i_cache_lmiss l3d_cache_allocate op_retired stall_slot
br_retired exc_taken l1i_cache_refill l3d_cache_lmiss_rd op_spec stall_slot_backend
bus_access inst_retired l1i_tlb l3d_cache_refill remote_access stall_slot_frontend
bus_cycles inst_spec l1i_tlb_refill ld_align_lat sample_collision trb_wrap
cid_write_retired itlb_walk l2d_cache ldst_align_lat sample_feed trcextout0
cnt_cycles l1d_cache l2d_cache_allocate ll_cache_miss_rd sample_filtrate trcextout1
cpu_cycles l1d_cache_lmiss_rd l2d_cache_lmiss_rd ll_cache_rd sample_pop trcextout2
cti_trigout4 l1d_cache_refill l2d_cache_refill mem_access st_align_lat trcextout3
cti_trigout5 l1d_cache_wb l2d_cache_wb mem_access_checked stall ttbr_write_retired
cti_trigout6 l1d_tlb l2d_tlb mem_access_checked_rd stall_backend
/sys/bus/event_source/devices/cs_etm/events:
autofdo
/sys/bus/event_source/devices/nvidia_cnvlink_pmu_0/events:
cycles rd_bytes_rem rd_cum_outs_rem rd_req_rem total_bytes_rem total_req_rem wr_bytes_rem wr_req_rem
rd_bytes_loc rd_cum_outs_loc rd_req_loc total_bytes_loc total_req_loc wr_bytes_loc wr_req_loc
/sys/bus/event_source/devices/nvidia_nvlink_c2c0_pmu_0/events:
cycles rd_bytes_rem rd_cum_outs_rem rd_req_rem total_bytes_rem total_req_rem wr_bytes_rem wr_req_rem
rd_bytes_loc rd_cum_outs_loc rd_req_loc total_bytes_loc total_req_loc wr_bytes_loc wr_req_loc
/sys/bus/event_source/devices/nvidia_nvlink_c2c1_pmu_0/events:
cycles rd_bytes_rem rd_cum_outs_rem rd_req_rem total_bytes_rem total_req_rem wr_bytes_rem wr_req_rem
rd_bytes_loc rd_cum_outs_loc rd_req_loc total_bytes_loc total_req_loc wr_bytes_loc wr_req_loc
/sys/bus/event_source/devices/nvidia_pcie_pmu_0/events:
cycles rd_bytes_rem rd_cum_outs_rem rd_req_rem total_bytes_rem total_req_rem wr_bytes_rem wr_req_rem
rd_bytes_loc rd_cum_outs_loc rd_req_loc total_bytes_loc total_req_loc wr_bytes_loc wr_req_loc
/sys/bus/event_source/devices/nvidia_scf_pmu_0/events:
bus_cycles gmem_rd_data scf_cache socket_1_rd_access socket_2_wb_data
cmem_rd_access gmem_rd_outstanding scf_cache_allocate socket_1_rd_data socket_2_wr_access
cmem_rd_data gmem_wb_access scf_cache_refill socket_1_rd_outstanding socket_2_wr_data
cmem_rd_outstanding gmem_wb_data scf_cache_wb socket_1_wb_access socket_3_rd_access
cmem_wb_access gmem_wr_access socket_0_rd_access socket_1_wb_data socket_3_rd_data
cmem_wb_data gmem_wr_data socket_0_rd_data socket_1_wr_access socket_3_rd_outstanding
cmem_wr_access gmem_wr_total_bytes socket_0_rd_outstanding socket_1_wr_data socket_3_wb_access
cmem_wr_data remote_socket_rd_access socket_0_wb_access socket_2_rd_access socket_3_wb_data
cmem_wr_total_bytes remote_socket_rd_data socket_0_wb_data socket_2_rd_data socket_3_wr_access
cycles remote_socket_rd_outstanding socket_0_wr_access socket_2_rd_outstanding socket_3_wr_data
gmem_rd_access remote_socket_wr_total_bytes socket_0_wr_data socket_2_wb_access
/sys/bus/event_source/devices/smmuv3_pmcg_11002/events:
config_cache_miss config_struct_access cycles pcie_ats_trans_rq tlb_miss transaction trans_table_walk_access
/sys/bus/event_source/devices/smmuv3_pmcg_11042/events:
cycles pcie_ats_trans_passed tlb_miss transaction
/sys/bus/event_source/devices/smmuv3_pmcg_11062/events:
cycles pcie_ats_trans_passed tlb_miss transaction
/sys/bus/event_source/devices/smmuv3_pmcg_11082/events:
cycles pcie_ats_trans_passed tlb_miss transaction
/sys/bus/event_source/devices/smmuv3_pmcg_110a2/events:
cycles pcie_ats_trans_passed tlb_miss transaction
/sys/bus/event_source/devices/smmuv3_pmcg_12002/events:
config_cache_miss config_struct_access cycles pcie_ats_trans_rq tlb_miss transaction trans_table_walk_access
/sys/bus/event_source/devices/smmuv3_pmcg_12042/events:
cycles pcie_ats_trans_passed tlb_miss transaction
/sys/bus/event_source/devices/smmuv3_pmcg_12062/events:
cycles pcie_ats_trans_passed tlb_miss transaction
/sys/bus/event_source/devices/smmuv3_pmcg_12082/events:
cycles pcie_ats_trans_passed tlb_miss transaction
/sys/bus/event_source/devices/smmuv3_pmcg_120a2/events:
cycles pcie_ats_trans_passed tlb_miss transaction
/sys/bus/event_source/devices/smmuv3_pmcg_15002/events:
config_cache_miss config_struct_access cycles pcie_ats_trans_rq tlb_miss transaction trans_table_walk_access
/sys/bus/event_source/devices/smmuv3_pmcg_15042/events:
cycles pcie_ats_trans_passed tlb_miss transaction
/sys/bus/event_source/devices/smmuv3_pmcg_15062/events:
cycles pcie_ats_trans_passed tlb_miss transaction
/sys/bus/event_source/devices/smmuv3_pmcg_15082/events:
cycles pcie_ats_trans_passed tlb_miss transaction
/sys/bus/event_source/devices/smmuv3_pmcg_150a2/events:
cycles pcie_ats_trans_passed tlb_miss transaction
/sys/bus/event_source/devices/smmuv3_pmcg_16002/events:
config_cache_miss config_struct_access cycles pcie_ats_trans_rq tlb_miss transaction trans_table_walk_access
/sys/bus/event_source/devices/smmuv3_pmcg_16042/events:
cycles pcie_ats_trans_passed tlb_miss transaction
/sys/bus/event_source/devices/smmuv3_pmcg_16062/events:
cycles pcie_ats_trans_passed tlb_miss transaction
/sys/bus/event_source/devices/smmuv3_pmcg_5002/events:
config_cache_miss config_struct_access cycles pcie_ats_trans_rq tlb_miss transaction trans_table_walk_access
/sys/bus/event_source/devices/smmuv3_pmcg_5042/events:
cycles pcie_ats_trans_passed tlb_miss transaction
/sys/bus/event_source/devices/smmuv3_pmcg_5062/events:
cycles pcie_ats_trans_passed tlb_miss transaction
> ```
> and the cpuid to match it up with the json.
> ```
> $ perf stat -v sleep 1 2>&1 |head -1
# perf stat -v sleep 1 2>&1 |head -1
Using CPUID 0x00000000410fd4f0
> this information is in the verbose output too:
> ```
> $ perf stat -vv sleep 1
------------------------------------------------------------
perf_event_attr:
type 4294967294 (tool)
size 144
config 0x1 (duration_time)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
enable_on_exec 1
------------------------------------------------------------
------------------------------------------------------------
perf_event_attr:
type 4294967294 (tool)
size 144
config 0x1 (duration_time)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
enable_on_exec 1
------------------------------------------------------------
------------------------------------------------------------
perf_event_attr:
type 4294967294 (tool)
size 144
config 0x1 (duration_time)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
enable_on_exec 1
------------------------------------------------------------
------------------------------------------------------------
perf_event_attr:
type 4294967294 (tool)
size 144
config 0x1 (duration_time)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
enable_on_exec 1
------------------------------------------------------------
------------------------------------------------------------
perf_event_attr:
type 4294967294 (tool)
size 144
config 0x1 (duration_time)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
enable_on_exec 1
------------------------------------------------------------
------------------------------------------------------------
perf_event_attr:
type 4294967294 (tool)
size 144
config 0x1 (duration_time)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
enable_on_exec 1
------------------------------------------------------------
------------------------------------------------------------
perf_event_attr:
type 1 (PERF_TYPE_SOFTWARE)
size 144
config 0x3 (PERF_COUNT_SW_CONTEXT_SWITCHES)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
enable_on_exec 1
------------------------------------------------------------
sys_perf_event_open: pid 865887 cpu -1 group_fd -1 flags 0x8 = 3
------------------------------------------------------------
perf_event_attr:
type 1 (PERF_TYPE_SOFTWARE)
size 144
config 0x4 (PERF_COUNT_SW_CPU_MIGRATIONS)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
enable_on_exec 1
------------------------------------------------------------
sys_perf_event_open: pid 865887 cpu -1 group_fd -1 flags 0x8 = 4
------------------------------------------------------------
perf_event_attr:
type 1 (PERF_TYPE_SOFTWARE)
size 144
config 0x2 (PERF_COUNT_SW_PAGE_FAULTS)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
enable_on_exec 1
------------------------------------------------------------
sys_perf_event_open: pid 865887 cpu -1 group_fd -1 flags 0x8 = 5
------------------------------------------------------------
perf_event_attr:
type 1 (PERF_TYPE_SOFTWARE)
size 144
config 0x1 (PERF_COUNT_SW_TASK_CLOCK)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
enable_on_exec 1
------------------------------------------------------------
sys_perf_event_open: pid 865887 cpu -1 group_fd -1 flags 0x8 = 7
------------------------------------------------------------
perf_event_attr:
type 0 (PERF_TYPE_HARDWARE)
size 144
config 0x5 (PERF_COUNT_HW_BRANCH_MISSES)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING|ID|GROUP
disabled 1
inherit 1
enable_on_exec 1
------------------------------------------------------------
sys_perf_event_open: pid 865887 cpu -1 group_fd -1 flags 0x8 = 8
------------------------------------------------------------
perf_event_attr:
type 0 (PERF_TYPE_HARDWARE)
size 144
config 0x4 (PERF_COUNT_HW_BRANCH_INSTRUCTIONS)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING|ID|GROUP
inherit 1
------------------------------------------------------------
sys_perf_event_open: pid 865887 cpu -1 group_fd 8 flags 0x8 = 9
------------------------------------------------------------
perf_event_attr:
type 0 (PERF_TYPE_HARDWARE)
size 144
config 0x4 (PERF_COUNT_HW_BRANCH_INSTRUCTIONS)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
enable_on_exec 1
------------------------------------------------------------
sys_perf_event_open: pid 865887 cpu -1 group_fd -1 flags 0x8 = 10
------------------------------------------------------------
perf_event_attr:
type 0 (PERF_TYPE_HARDWARE)
size 144
config 0 (PERF_COUNT_HW_CPU_CYCLES)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
enable_on_exec 1
------------------------------------------------------------
sys_perf_event_open: pid 865887 cpu -1 group_fd -1 flags 0x8 = 11
------------------------------------------------------------
perf_event_attr:
type 0 (PERF_TYPE_HARDWARE)
size 144
config 0 (PERF_COUNT_HW_CPU_CYCLES)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING|ID|GROUP
disabled 1
inherit 1
enable_on_exec 1
------------------------------------------------------------
sys_perf_event_open: pid 865887 cpu -1 group_fd -1 flags 0x8 = 12
------------------------------------------------------------
perf_event_attr:
type 0 (PERF_TYPE_HARDWARE)
size 144
config 0x1 (PERF_COUNT_HW_INSTRUCTIONS)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING|ID|GROUP
inherit 1
------------------------------------------------------------
sys_perf_event_open: pid 865887 cpu -1 group_fd 12 flags 0x8 = 13
------------------------------------------------------------
perf_event_attr:
type 0 (PERF_TYPE_HARDWARE)
size 144
config 0 (PERF_COUNT_HW_CPU_CYCLES)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING|ID|GROUP
disabled 1
inherit 1
enable_on_exec 1
------------------------------------------------------------
sys_perf_event_open: pid 865887 cpu -1 group_fd -1 flags 0x8 = 14
------------------------------------------------------------
perf_event_attr:
type 0 (PERF_TYPE_HARDWARE)
size 144
config 0x7 (PERF_COUNT_HW_STALLED_CYCLES_FRONTEND)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING|ID|GROUP
inherit 1
------------------------------------------------------------
sys_perf_event_open: pid 865887 cpu -1 group_fd 14 flags 0x8 = 15
------------------------------------------------------------
perf_event_attr:
type 0 (PERF_TYPE_HARDWARE)
size 144
config 0 (PERF_COUNT_HW_CPU_CYCLES)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING|ID|GROUP
disabled 1
inherit 1
enable_on_exec 1
------------------------------------------------------------
sys_perf_event_open: pid 865887 cpu -1 group_fd -1 flags 0x8 = 16
------------------------------------------------------------
perf_event_attr:
type 0 (PERF_TYPE_HARDWARE)
size 144
config 0x8 (PERF_COUNT_HW_STALLED_CYCLES_BACKEND)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING|ID|GROUP
inherit 1
------------------------------------------------------------
sys_perf_event_open: pid 865887 cpu -1 group_fd 16 flags 0x8 = 17
------------------------------------------------------------
perf_event_attr:
type 0 (PERF_TYPE_HARDWARE)
size 144
config 0x8 (PERF_COUNT_HW_STALLED_CYCLES_BACKEND)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING|ID|GROUP
disabled 1
inherit 1
enable_on_exec 1
------------------------------------------------------------
sys_perf_event_open: pid 865887 cpu -1 group_fd -1 flags 0x8 = 18
------------------------------------------------------------
perf_event_attr:
type 0 (PERF_TYPE_HARDWARE)
size 144
config 0x1 (PERF_COUNT_HW_INSTRUCTIONS)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING|ID|GROUP
inherit 1
------------------------------------------------------------
sys_perf_event_open: pid 865887 cpu -1 group_fd 18 flags 0x8 = 19
------------------------------------------------------------
perf_event_attr:
type 0 (PERF_TYPE_HARDWARE)
size 144
config 0x7 (PERF_COUNT_HW_STALLED_CYCLES_FRONTEND)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING|ID|GROUP
inherit 1
------------------------------------------------------------
sys_perf_event_open: pid 865887 cpu -1 group_fd 18 flags 0x8 = 20
------------------------------------------------------------
perf_event_attr:
type 4294967294 (tool)
size 144
config 0x1 (duration_time)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
enable_on_exec 1
------------------------------------------------------------
------------------------------------------------------------
perf_event_attr:
type 4294967294 (tool)
size 144
config 0x1 (duration_time)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
enable_on_exec 1
------------------------------------------------------------
------------------------------------------------------------
perf_event_attr:
type 4294967294 (tool)
size 144
config 0x1 (duration_time)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
enable_on_exec 1
------------------------------------------------------------
------------------------------------------------------------
perf_event_attr:
type 4294967294 (tool)
size 144
config 0x1 (duration_time)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING
disabled 1
inherit 1
enable_on_exec 1
------------------------------------------------------------
------------------------------------------------------------
perf_event_attr:
type 10 (armv8_pmuv3_0)
size 144
config 0x10 (br_mis_pred)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING|ID|GROUP
disabled 1
inherit 1
enable_on_exec 1
------------------------------------------------------------
sys_perf_event_open: pid 865887 cpu -1 group_fd -1 flags 0x8 = 21
------------------------------------------------------------
perf_event_attr:
type 10 (armv8_pmuv3_0)
size 144
config 0x3b (op_spec)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING|ID|GROUP
inherit 1
------------------------------------------------------------
sys_perf_event_open: pid 865887 cpu -1 group_fd 21 flags 0x8 = 22
------------------------------------------------------------
perf_event_attr:
type 10 (armv8_pmuv3_0)
size 144
config 0x3f (stall_slot)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING|ID|GROUP
inherit 1
------------------------------------------------------------
sys_perf_event_open: pid 865887 cpu -1 group_fd 21 flags 0x8 = 23
------------------------------------------------------------
perf_event_attr:
type 10 (armv8_pmuv3_0)
size 144
config 0x11 (cpu_cycles)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING|ID|GROUP
inherit 1
------------------------------------------------------------
sys_perf_event_open: pid 865887 cpu -1 group_fd 21 flags 0x8 = 24
------------------------------------------------------------
perf_event_attr:
type 10 (armv8_pmuv3_0)
size 144
config 0x3a (op_retired)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING|ID|GROUP
inherit 1
------------------------------------------------------------
sys_perf_event_open: pid 865887 cpu -1 group_fd 21 flags 0x8 = 25
------------------------------------------------------------
perf_event_attr:
type 10 (armv8_pmuv3_0)
size 144
config 0x11 (cpu_cycles)
sample_type IDENTIFIER
read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING|ID|GROUP
inherit 1
------------------------------------------------------------
Thanks for your help,
--breno
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