Dmitrii Dolgov b13e20cc58 perf stat: Separate bperf from bpf_profiler ... [ Upstream commit ecc68ee216 ] It seems that perf stat -b <prog id> doesn't produce any results: $ perf stat -e cycles -b 4 -I 10000 -vvv Control descriptor is not initialized cycles: 0 0 0 time counts unit events 10.007641640 <not supported> cycles Looks like this happens because fentry/fexit progs are getting loaded, but the corresponding perf event is not enabled and not added into the events bpf map. I think there is some mixing up between two type of bpf support, one for bperf and one for bpf_profiler. Both are identified via evsel__is_bpf, based on which perf events are enabled, but for the latter (bpf_profiler) a perf event is required. Using evsel__is_bperf to check only bperf produces expected results: $ perf stat -e cycles -b 4 -I 10000 -vvv Control descriptor is not initialized ------------------------------------------------------------ perf_event_attr: size 136 sample_type IDENTIFIER read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING disabled 1 exclude_guest 1 ------------------------------------------------------------ sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 3 ------------------------------------------------------------ [...perf_event_attr for other CPUs...] ------------------------------------------------------------ cycles: 309426 169009 169009 time counts unit events 10.010091271 309426 cycles The final numbers correspond (at least in the level of magnitude) to the same metric obtained via bpftool. Fixes: 112cb56164 ("perf stat: Introduce config stat.bpf-counter-events") Reviewed-by: Song Liu <song@kernel.org> Signed-off-by: Dmitrii Dolgov <9erthalion6@gmail.com> Tested-by: Song Liu <song@kernel.org> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Song Liu <song@kernel.org> Link: https://lore.kernel.org/r/20230412182316.11628-1-9erthalion6@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-05-17 11:50:21 +02:00
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accounting	…
arch	tools/x86/kcpuid: Fix avx512bw and avx512lvl fields in Fn00000007	2023-05-11 23:00:20 +09:00
bootconfig	bootconfig: Fix testcase to increase max node	2023-03-30 12:47:47 +02:00
bpf	bpftool: Fix bug for long instructions in program CFG dumps	2023-05-11 23:00:27 +09:00
build	tools build: Add feature test for init_disassemble_info API changes	2023-03-17 08:49:03 +01:00
cgroup	…
debugging	…
edid	…
firewire	…
firmware	…
gpio	tools: gpio: fix -c option of gpio-event-mon	2023-02-01 08:27:29 +01:00
hv	…
iio	tools/iio/iio_utils:fix memory leak	2023-03-11 13:57:34 +01:00
include	tools include: add dis-asm-compat.h to handle version differences	2023-03-17 08:49:04 +01:00
io_uring	…
kvm/kvm_stat	tools/kvm_stat: fix display of error when multiple processes are found	2022-08-11 13:07:51 +02:00
laptop	…
leds	…
lib	libbpf: Fix single-line struct definition output in btf_dump	2023-04-20 12:13:54 +02:00
memory-model	…
objtool	Revert "objtool: Support addition to set CFA base"	2023-05-11 23:00:35 +09:00
pci	…
pcmcia	…
perf	perf stat: Separate bperf from bpf_profiler	2023-05-17 11:50:21 +02:00
power	tools/power turbostat: fix decoding of HWP_STATUS	2023-04-05 11:24:54 +02:00
rcu	…
scripts	…
spi	…
testing	selftests: srv6: make srv6_end_dt46_l3vpn_test more robust	2023-05-17 11:50:16 +02:00
thermal/tmon	tools/thermal: Fix possible path truncations	2022-08-17 14:24:15 +02:00
time	…
tracing	…
usb	…
virtio	tools/virtio: fix the vringh test for virtio ring changes	2023-02-22 12:57:01 +01:00
vm	tools/vm/slabinfo-gnuplot: use "grep -E" instead of "egrep"	2022-12-08 11:28:42 +01:00
wmi	…
Makefile	…