Re: [PATCH v6 3/4] perf-stat: enable counting events for BPF programs
From: Song Liu
Date: Mon Dec 28 2020 - 18:45:26 EST
> On Dec 28, 2020, at 12:11 PM, Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> wrote:
>
> Em Mon, Dec 28, 2020 at 09:40:53AM -0800, Song Liu escreveu:
>> Introduce perf-stat -b option, which counts events for BPF programs, like:
>>
>> [root@localhost ~]# ~/perf stat -e ref-cycles,cycles -b 254 -I 1000
>> 1.487903822 115,200 ref-cycles
>> 1.487903822 86,012 cycles
>> 2.489147029 80,560 ref-cycles
>> 2.489147029 73,784 cycles
>> 3.490341825 60,720 ref-cycles
>> 3.490341825 37,797 cycles
>> 4.491540887 37,120 ref-cycles
>> 4.491540887 31,963 cycles
>>
>> The example above counts cycles and ref-cycles of BPF program of id 254.
>> This is similar to bpftool-prog-profile command, but more flexible.
>>
>> perf-stat -b creates per-cpu perf_event and loads fentry/fexit BPF
>> programs (monitor-progs) to the target BPF program (target-prog). The
>> monitor-progs read perf_event before and after the target-prog, and
>> aggregate the difference in a BPF map. Then the user space reads data
>> from these maps.
>>
>> A new struct bpf_counter is introduced to provide common interface that
>> uses BPF programs/maps to count perf events.
>
> Segfaulting here:
>
> [root@five ~]# bpftool prog | grep tracepoint
> 110: tracepoint name syscall_unaugme tag 57cd311f2e27366b gpl
> 111: tracepoint name sys_enter_conne tag 3555418ac9476139 gpl
> 112: tracepoint name sys_enter_sendt tag bc7fcadbaf7b8145 gpl
> 113: tracepoint name sys_enter_open tag 0e59c3ac2bea5280 gpl
> 114: tracepoint name sys_enter_opena tag 0baf443610f59837 gpl
> 115: tracepoint name sys_enter_renam tag 24664e4aca62d7fa gpl
> 116: tracepoint name sys_enter_renam tag 20093e51a8634ebb gpl
> 117: tracepoint name sys_enter tag 0bc3fc9d11754ba1 gpl
> 118: tracepoint name sys_exit tag 29c7ae234d79bd5c gpl
> [root@five ~]#
> [root@five ~]# gdb perf
> GNU gdb (GDB) Fedora 10.1-2.fc33
> Reading symbols from perf...
> (gdb) run stat -e instructions,cycles -b 113 -I 1000
> Starting program: /root/bin/perf stat -e instructions,cycles -b 113 -I 1000
> [Thread debugging using libthread_db enabled]
> Using host libthread_db library "/lib64/libthread_db.so.1".
> libbpf: elf: skipping unrecognized data section(9) .eh_frame
> libbpf: elf: skipping relo section(15) .rel.eh_frame for section(9) .eh_frame
> libbpf: elf: skipping unrecognized data section(9) .eh_frame
> libbpf: elf: skipping relo section(15) .rel.eh_frame for section(9) .eh_frame
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x000000000058d55b in bpf_program_profiler__read (evsel=0xc612c0) at util/bpf_counter.c:217
> 217 reading_map_fd = bpf_map__fd(skel->maps.accum_readings);
> (gdb) bt
> #0 0x000000000058d55b in bpf_program_profiler__read (evsel=0xc612c0) at util/bpf_counter.c:217
> #1 0x0000000000000000 in ?? ()
> (gdb)
>
> [acme@five perf]$ clang -v |& head -2
> clang version 11.0.0 (Fedora 11.0.0-2.fc33)
> Target: x86_64-unknown-linux-gnu
> [acme@five perf]$
>
> Do you need any extra info?
Hmm... I am not able to reproduce this. I am trying to setup an environment similar
to fc33 (clang 11, etc.). Does this segfault every time, and on all programs?
Thanks,
Song
>
> Please when resubmitting, please combine patches 3/4 and 4/4, man pages
> updates usually come together with the new feature.
>
> Thanks,
>
> - Arnaldo
>
> Full build output:
>
> [acme@five perf]$ rm -rf /tmp/build/perf ; mkdir -p /tmp/build/perf ;make VF=1 O=/tmp/build/perf -C tools/perf BUILD_BPF_SKEL=1 install-bin
> make: Entering directory '/home/acme/git/perf/tools/perf'
> BUILD: Doing 'make -j24' parallel build
> HOSTCC /tmp/build/perf/fixdep.o
> HOSTLD /tmp/build/perf/fixdep-in.o
> LINK /tmp/build/perf/fixdep
> Warning: Kernel ABI header at 'tools/include/uapi/linux/perf_event.h' differs from latest version at 'include/uapi/linux/perf_event.h'
> diff -u tools/include/uapi/linux/perf_event.h include/uapi/linux/perf_event.h
>
> Auto-detecting system features:
> ... dwarf: [ on ]
> ... dwarf_getlocations: [ on ]
> ... glibc: [ on ]
> ... libbfd: [ on ]
> ... libbfd-buildid: [ on ]
> ... libcap: [ on ]
> ... libelf: [ on ]
> ... libnuma: [ on ]
> ... numa_num_possible_cpus: [ on ]
> ... libperl: [ on ]
> ... libpython: [ on ]
> ... libcrypto: [ on ]
> ... libunwind: [ on ]
> ... libdw-dwarf-unwind: [ on ]
> ... zlib: [ on ]
> ... lzma: [ on ]
> ... get_cpuid: [ on ]
> ... bpf: [ on ]
> ... libaio: [ on ]
> ... libzstd: [ on ]
> ... disassembler-four-args: [ on ]
> ... backtrace: [ on ]
> ... eventfd: [ on ]
> ... fortify-source: [ on ]
> ... sync-compare-and-swap: [ on ]
> ... get_current_dir_name: [ on ]
> ... gettid: [ on ]
> ... libelf-getphdrnum: [ on ]
> ... libelf-gelf_getnote: [ on ]
> ... libelf-getshdrstrndx: [ on ]
> ... libpython-version: [ on ]
> ... libslang: [ on ]
> ... libslang-include-subdir: [ on ]
> ... pthread-attr-setaffinity-np: [ on ]
> ... pthread-barrier: [ on ]
> ... reallocarray: [ on ]
> ... stackprotector-all: [ on ]
> ... timerfd: [ on ]
> ... sched_getcpu: [ on ]
> ... sdt: [ on ]
> ... setns: [ on ]
> ... file-handle: [ on ]
>
> ... bionic: [ OFF ]
> ... compile-32: [ OFF ]
> ... compile-x32: [ OFF ]
> ... cplus-demangle: [ on ]
> ... gtk2: [ OFF ]
> ... gtk2-infobar: [ OFF ]
> ... hello: [ OFF ]
> ... libbabeltrace: [ on ]
> ... libbfd-liberty: [ OFF ]
> ... libbfd-liberty-z: [ OFF ]
> ... libopencsd: [ OFF ]
> ... libunwind-x86: [ OFF ]
> ... libunwind-x86_64: [ OFF ]
> ... libunwind-arm: [ OFF ]
> ... libunwind-aarch64: [ OFF ]
> ... libunwind-debug-frame: [ OFF ]
> ... libunwind-debug-frame-arm: [ OFF ]
> ... libunwind-debug-frame-aarch64: [ OFF ]
> ... cxx: [ OFF ]
> ... llvm: [ OFF ]
> ... llvm-version: [ OFF ]
> ... clang: [ OFF ]
> ... libbpf: [ OFF ]
> ... libpfm4: [ OFF ]
> ... libdebuginfod: [ on ]
> ... clang-bpf-co-re: [ on ]
> ... prefix: /home/acme
> ... bindir: /home/acme/bin
> ... libdir: /home/acme/lib64
> ... sysconfdir: /home/acme/etc
> ... LIBUNWIND_DIR:
> ... LIBDW_DIR:
> ... JDIR: /usr/lib/jvm/java-11-openjdk-11.0.9.11-4.fc33.x86_64
> ... DWARF post unwind library: libunwind
>
> GEN /tmp/build/perf/common-cmds.h
> CFLAGS= make -C ../bpf/bpftool \
> OUTPUT=/tmp/build/perf/util/bpf_skel/.tmp/ bootstrap
> CC /tmp/build/perf/exec-cmd.o
> CC /tmp/build/perf/help.o
> MKDIR /tmp/build/perf/pmu-events/
> MKDIR /tmp/build/perf/jvmti/
> MKDIR /tmp/build/perf/fd/
> MKDIR /tmp/build/perf/fs/
> MKDIR /tmp/build/perf/fs/
> HOSTCC /tmp/build/perf/pmu-events/json.o
> CC /tmp/build/perf/parse-options.o
> CC /tmp/build/perf/fd/array.o
> CC /tmp/build/perf/pager.o
> CC /tmp/build/perf/jvmti/libjvmti.o
> CC /tmp/build/perf/fs/fs.o
> CC /tmp/build/perf/run-command.o
> MKDIR /tmp/build/perf/jvmti/
> CC /tmp/build/perf/sigchain.o
> MKDIR /tmp/build/perf/fs/
> CC /tmp/build/perf/fs/tracing_path.o
> CC /tmp/build/perf/fs/cgroup.o
> MKDIR /tmp/build/perf/pmu-events/
> CC /tmp/build/perf/jvmti/libstring.o
> HOSTCC /tmp/build/perf/pmu-events/jevents.o
> CC /tmp/build/perf/jvmti/libctype.o
> CC /tmp/build/perf/subcmd-config.o
> CC /tmp/build/perf/jvmti/jvmti_agent.o
> LD /tmp/build/perf/fd/libapi-in.o
> CC /tmp/build/perf/event-parse.o
> HOSTCC /tmp/build/perf/pmu-events/jsmn.o
> CC /tmp/build/perf/event-plugin.o
> CC /tmp/build/perf/cpu.o
> CC /tmp/build/perf/trace-seq.o
> CC /tmp/build/perf/core.o
> CC /tmp/build/perf/parse-filter.o
> CC /tmp/build/perf/debug.o
> CC /tmp/build/perf/cpumap.o
> LD /tmp/build/perf/fs/libapi-in.o
> CC /tmp/build/perf/threadmap.o
> LD /tmp/build/perf/libsubcmd-in.o
> HOSTLD /tmp/build/perf/pmu-events/jevents-in.o
> CC /tmp/build/perf/str_error_r.o
> CC /tmp/build/perf/evsel.o
> GEN /tmp/build/perf/bpf_helper_defs.h
> CC /tmp/build/perf/evlist.o
> CC /tmp/build/perf/parse-utils.o
> CC /tmp/build/perf/zalloc.o
> CC /tmp/build/perf/kbuffer-parse.o
> LD /tmp/build/perf/jvmti/jvmti-in.o
> CC /tmp/build/perf/mmap.o
> CC /tmp/build/perf/tep_strerror.o
> CC /tmp/build/perf/xyarray.o
> CC /tmp/build/perf/event-parse-api.o
> CC /tmp/build/perf/lib.o
> LINK /tmp/build/perf/pmu-events/jevents
> LD /tmp/build/perf/libapi-in.o
> AR /tmp/build/perf/libsubcmd.a
> LINK /tmp/build/perf/libperf-jvmti.so
> LD /tmp/build/perf/libtraceevent-in.o
> CC /tmp/build/perf/plugin_hrtimer.o
> CC /tmp/build/perf/plugin_kmem.o
> CC /tmp/build/perf/plugin_mac80211.o
> CC /tmp/build/perf/plugin_kvm.o
> CC /tmp/build/perf/plugin_jbd2.o
> LD /tmp/build/perf/libperf-in.o
> CC /tmp/build/perf/plugin_sched_switch.o
> CC /tmp/build/perf/plugin_function.o
> CC /tmp/build/perf/plugin_scsi.o
> CC /tmp/build/perf/plugin_xen.o
> CC /tmp/build/perf/plugin_futex.o
> CC /tmp/build/perf/plugin_cfg80211.o
> CC /tmp/build/perf/plugin_tlb.o
> AR /tmp/build/perf/libapi.a
> LD /tmp/build/perf/plugin_hrtimer-in.o
> LINK /tmp/build/perf/libtraceevent.a
> LD /tmp/build/perf/plugin_kvm-in.o
> LD /tmp/build/perf/plugin_scsi-in.o
> LD /tmp/build/perf/plugin_kmem-in.o
> LD /tmp/build/perf/plugin_mac80211-in.o
> LD /tmp/build/perf/plugin_futex-in.o
> LD /tmp/build/perf/plugin_function-in.o
> LD /tmp/build/perf/plugin_xen-in.o
> LD /tmp/build/perf/plugin_sched_switch-in.o
> LD /tmp/build/perf/plugin_tlb-in.o
> LD /tmp/build/perf/plugin_jbd2-in.o
> LINK /tmp/build/perf/plugin_hrtimer.so
> LINK /tmp/build/perf/plugin_kmem.so
> AR /tmp/build/perf/libperf.a
> LINK /tmp/build/perf/plugin_scsi.so
> LINK /tmp/build/perf/plugin_kvm.so
> LINK /tmp/build/perf/plugin_mac80211.so
> LD /tmp/build/perf/plugin_cfg80211-in.o
> LINK /tmp/build/perf/plugin_futex.so
> LINK /tmp/build/perf/plugin_xen.so
> LINK /tmp/build/perf/plugin_function.so
> LINK /tmp/build/perf/plugin_tlb.so
> LINK /tmp/build/perf/plugin_jbd2.so
> LINK /tmp/build/perf/plugin_cfg80211.so
> LINK /tmp/build/perf/plugin_sched_switch.so
> GEN /tmp/build/perf/pmu-events/pmu-events.c
> GEN /tmp/build/perf/libtraceevent-dynamic-list
> MKDIR /tmp/build/perf/staticobjs/
> MKDIR /tmp/build/perf/staticobjs/
> MKDIR /tmp/build/perf/staticobjs/
> MKDIR /tmp/build/perf/staticobjs/
> MKDIR /tmp/build/perf/staticobjs/
> MKDIR /tmp/build/perf/staticobjs/
> MKDIR /tmp/build/perf/staticobjs/
> PERF_VERSION = 5.11.rc1.g5eb0b370de61
> MKDIR /tmp/build/perf/staticobjs/
> CC /tmp/build/perf/staticobjs/libbpf_probes.o
> CC /tmp/build/perf/staticobjs/libbpf.o
> CC /tmp/build/perf/staticobjs/bpf.o
> CC /tmp/build/perf/staticobjs/nlattr.o
> CC /tmp/build/perf/staticobjs/btf.o
> CC /tmp/build/perf/staticobjs/xsk.o
> GEN perf-archive
> CC /tmp/build/perf/staticobjs/hashmap.o
> GEN perf-with-kcore
> CC /tmp/build/perf/staticobjs/btf_dump.o
> CC /tmp/build/perf/staticobjs/libbpf_errno.o
> CC /tmp/build/perf/staticobjs/str_error.o
> CC /tmp/build/perf/staticobjs/bpf_prog_linfo.o
> CC /tmp/build/perf/staticobjs/netlink.o
> CC /tmp/build/perf/staticobjs/ringbuf.o
> LD /tmp/build/perf/staticobjs/libbpf-in.o
> LINK /tmp/build/perf/libbpf.a
> CLANG /tmp/build/perf/util/bpf_skel/.tmp/bpf_prog_profiler.bpf.o
> DESCEND plugins
> GEN /tmp/build/perf/python/perf.so
> CC /tmp/build/perf/plugins/plugin_jbd2.o
> CC /tmp/build/perf/plugins/plugin_kmem.o
> CC /tmp/build/perf/plugins/plugin_hrtimer.o
> CC /tmp/build/perf/plugins/plugin_mac80211.o
> CC /tmp/build/perf/plugins/plugin_kvm.o
> CC /tmp/build/perf/plugins/plugin_function.o
> CC /tmp/build/perf/plugins/plugin_xen.o
> CC /tmp/build/perf/plugins/plugin_sched_switch.o
> CC /tmp/build/perf/plugins/plugin_futex.o
> CC /tmp/build/perf/plugins/plugin_scsi.o
> CC /tmp/build/perf/plugins/plugin_tlb.o
> CC /tmp/build/perf/plugins/plugin_cfg80211.o
> LD /tmp/build/perf/plugins/plugin_jbd2-in.o
> LD /tmp/build/perf/plugins/plugin_kmem-in.o
> LD /tmp/build/perf/plugins/plugin_hrtimer-in.o
> LD /tmp/build/perf/plugins/plugin_kvm-in.o
> LD /tmp/build/perf/plugins/plugin_mac80211-in.o
> LD /tmp/build/perf/plugins/plugin_function-in.o
> LD /tmp/build/perf/plugins/plugin_xen-in.o
> LD /tmp/build/perf/plugins/plugin_sched_switch-in.o
> LD /tmp/build/perf/plugins/plugin_scsi-in.o
> LD /tmp/build/perf/plugins/plugin_futex-in.o
> LD /tmp/build/perf/plugins/plugin_cfg80211-in.o
> LD /tmp/build/perf/plugins/plugin_tlb-in.o
> LINK /tmp/build/perf/plugins/plugin_jbd2.so
> LINK /tmp/build/perf/plugins/plugin_hrtimer.so
> LINK /tmp/build/perf/plugins/plugin_kmem.so
> LINK /tmp/build/perf/plugins/plugin_mac80211.so
> LINK /tmp/build/perf/plugins/plugin_kvm.so
> LINK /tmp/build/perf/plugins/plugin_sched_switch.so
> LINK /tmp/build/perf/plugins/plugin_scsi.so
> LINK /tmp/build/perf/plugins/plugin_xen.so
> LINK /tmp/build/perf/plugins/plugin_function.so
> LINK /tmp/build/perf/plugins/plugin_futex.so
> LINK /tmp/build/perf/plugins/plugin_tlb.so
> LINK /tmp/build/perf/plugins/plugin_cfg80211.so
> INSTALL trace_plugins
> CC /tmp/build/perf/pmu-events/pmu-events.o
> LD /tmp/build/perf/pmu-events/pmu-events-in.o
>
> Auto-detecting system features:
> ... libbfd: [ on ]
> ... disassembler-four-args: [ on ]
> ... zlib: [ on ]
> ... libcap: [ on ]
> ... clang-bpf-co-re: [ on ]
> ... reallocarray: [ on ]
>
> MKDIR /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/
> MKDIR /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/
> CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/main.o
> CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/common.o
> CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/btf.o
> CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/json_writer.o
> CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/gen.o
>
> Auto-detecting system features:
> ... libelf: [ on ]
> ... zlib: [ on ]
> ... bpf: [ on ]
>
> GEN /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/bpf_helper_defs.h
> MKDIR /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/
> MKDIR /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/
> MKDIR /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/
> MKDIR /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/
> MKDIR /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/
> MKDIR /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/
> MKDIR /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/
> MKDIR /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/
> CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/libbpf.o
> CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/libbpf_probes.o
> CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/btf.o
> CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/nlattr.o
> CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/xsk.o
> CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/libbpf_errno.o
> CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/bpf.o
> CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/netlink.o
> CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/str_error.o
> CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/hashmap.o
> CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/bpf_prog_linfo.o
> CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/btf_dump.o
> CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/ringbuf.o
> LD /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/libbpf-in.o
> LINK /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/libbpf.a
> LINK /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/bpftool
> GEN-SKEL /tmp/build/perf/util/bpf_skel/bpf_prog_profiler.skel.h
> libbpf: elf: skipping unrecognized data section(9) .eh_frame
> libbpf: elf: skipping relo section(15) .rel.eh_frame for section(9) .eh_frame
> CC /tmp/build/perf/builtin-bench.o
> CC /tmp/build/perf/builtin-annotate.o
> CC /tmp/build/perf/builtin-diff.o
> CC /tmp/build/perf/builtin-config.o
> CC /tmp/build/perf/builtin-ftrace.o
> CC /tmp/build/perf/builtin-help.o
> CC /tmp/build/perf/builtin-evlist.o
> CC /tmp/build/perf/builtin-sched.o
> CC /tmp/build/perf/builtin-buildid-list.o
> CC /tmp/build/perf/builtin-kallsyms.o
> CC /tmp/build/perf/builtin-buildid-cache.o
> CC /tmp/build/perf/builtin-record.o
> CC /tmp/build/perf/builtin-report.o
> CC /tmp/build/perf/builtin-list.o
> CC /tmp/build/perf/builtin-stat.o
> CC /tmp/build/perf/builtin-top.o
> CC /tmp/build/perf/builtin-timechart.o
> CC /tmp/build/perf/builtin-script.o
> CC /tmp/build/perf/builtin-kmem.o
> CC /tmp/build/perf/builtin-lock.o
> CC /tmp/build/perf/builtin-kvm.o
> CC /tmp/build/perf/builtin-inject.o
> CC /tmp/build/perf/builtin-mem.o
> CC /tmp/build/perf/builtin-version.o
> CC /tmp/build/perf/builtin-data.o
> CC /tmp/build/perf/builtin-trace.o
> CC /tmp/build/perf/builtin-probe.o
> CC /tmp/build/perf/builtin-c2c.o
> MKDIR /tmp/build/perf/bench/
> MKDIR /tmp/build/perf/bench/
> MKDIR /tmp/build/perf/tests/
> CC /tmp/build/perf/arch/common.o
> MKDIR /tmp/build/perf/ui/
> MKDIR /tmp/build/perf/bench/
> MKDIR /tmp/build/perf/tests/
> CC /tmp/build/perf/bench/sched-messaging.o
> CC /tmp/build/perf/bench/sched-pipe.o
> CC /tmp/build/perf/tests/builtin-test.o
> MKDIR /tmp/build/perf/scripts/python/Perf-Trace-Util/
> MKDIR /tmp/build/perf/scripts/perl/Perf-Trace-Util/
> MKDIR /tmp/build/perf/tests/
> MKDIR /tmp/build/perf/ui/
> CC /tmp/build/perf/ui/setup.o
> CC /tmp/build/perf/tests/attr.o
> CC /tmp/build/perf/bench/syscall.o
> CC /tmp/build/perf/tests/parse-events.o
> CC /tmp/build/perf/trace/beauty/clone.o
> CC /tmp/build/perf/scripts/python/Perf-Trace-Util/Context.o
> CC /tmp/build/perf/tests/dso-data.o
> MKDIR /tmp/build/perf/arch/x86/util/
> CC /tmp/build/perf/ui/helpline.o
> CC /tmp/build/perf/scripts/perl/Perf-Trace-Util/Context.o
> MKDIR /tmp/build/perf/ui/
> CC /tmp/build/perf/ui/util.o
> CC /tmp/build/perf/arch/x86/util/header.o
> MKDIR /tmp/build/perf/arch/x86/tests/
> CC /tmp/build/perf/ui/hist.o
> CC /tmp/build/perf/ui/progress.o
> CC /tmp/build/perf/tests/vmlinux-kallsyms.o
> CC /tmp/build/perf/arch/x86/tests/regs_load.o
> CC /tmp/build/perf/bench/mem-functions.o
> CC /tmp/build/perf/trace/beauty/fcntl.o
> CC /tmp/build/perf/trace/beauty/flock.o
> CC /tmp/build/perf/bench/futex-hash.o
> CC /tmp/build/perf/trace/beauty/fsmount.o
> CC /tmp/build/perf/perf.o
> CC /tmp/build/perf/tests/openat-syscall.o
> MKDIR /tmp/build/perf/ui/stdio/
> MKDIR /tmp/build/perf/arch/x86/util/
> LD /tmp/build/perf/scripts/python/Perf-Trace-Util/perf-in.o
> MKDIR /tmp/build/perf/arch/x86/tests/
> CC /tmp/build/perf/tests/openat-syscall-all-cpus.o
> CC /tmp/build/perf/arch/x86/util/pmu.o
> CC /tmp/build/perf/trace/beauty/fspick.o
> CC /tmp/build/perf/arch/x86/util/tsc.o
> CC /tmp/build/perf/util/annotate.o
> CC /tmp/build/perf/tests/openat-syscall-tp-fields.o
> CC /tmp/build/perf/trace/beauty/ioctl.o
> CC /tmp/build/perf/bench/futex-wake.o
> CC /tmp/build/perf/arch/x86/tests/dwarf-unwind.o
> CC /tmp/build/perf/bench/futex-wake-parallel.o
> CC /tmp/build/perf/ui/stdio/hist.o
> CC /tmp/build/perf/arch/x86/tests/arch-tests.o
> CC /tmp/build/perf/trace/beauty/kcmp.o
> CC /tmp/build/perf/arch/x86/util/perf_regs.o
> CC /tmp/build/perf/trace/beauty/mount_flags.o
> CC /tmp/build/perf/arch/x86/util/kvm-stat.o
> CC /tmp/build/perf/bench/futex-requeue.o
> CC /tmp/build/perf/util/block-info.o
> CC /tmp/build/perf/arch/x86/tests/rdpmc.o
> CC /tmp/build/perf/bench/futex-lock-pi.o
> CC /tmp/build/perf/arch/x86/tests/insn-x86.o
> CC /tmp/build/perf/trace/beauty/move_mount.o
> CC /tmp/build/perf/tests/mmap-basic.o
> CC /tmp/build/perf/trace/beauty/pkey_alloc.o
> CC /tmp/build/perf/tests/perf-record.o
> CC /tmp/build/perf/trace/beauty/arch_prctl.o
> CC /tmp/build/perf/arch/x86/util/topdown.o
> CC /tmp/build/perf/tests/evsel-roundtrip-name.o
> CC /tmp/build/perf/tests/evsel-tp-sched.o
> CC /tmp/build/perf/arch/x86/tests/intel-pt-pkt-decoder-test.o
> CC /tmp/build/perf/bench/epoll-wait.o
> CC /tmp/build/perf/tests/fdarray.o
> CC /tmp/build/perf/bench/epoll-ctl.o
> CC /tmp/build/perf/arch/x86/util/machine.o
> CC /tmp/build/perf/trace/beauty/prctl.o
> CC /tmp/build/perf/ui/browser.o
> CC /tmp/build/perf/arch/x86/util/event.o
> CC /tmp/build/perf/arch/x86/tests/bp-modify.o
> CC /tmp/build/perf/trace/beauty/renameat.o
> CC /tmp/build/perf/tests/pmu.o
> CC /tmp/build/perf/tests/pmu-events.o
> CC /tmp/build/perf/tests/hists_common.o
> CC /tmp/build/perf/bench/synthesize.o
> CC /tmp/build/perf/arch/x86/util/dwarf-regs.o
> CC /tmp/build/perf/tests/hists_link.o
> CC /tmp/build/perf/trace/beauty/sockaddr.o
> CC /tmp/build/perf/arch/x86/util/unwind-libunwind.o
> CC /tmp/build/perf/trace/beauty/socket.o
> CC /tmp/build/perf/trace/beauty/statx.o
> LD /tmp/build/perf/arch/x86/tests/perf-in.o
> CC /tmp/build/perf/arch/x86/util/auxtrace.o
> CC /tmp/build/perf/arch/x86/util/archinsn.o
> CC /tmp/build/perf/bench/kallsyms-parse.o
> CC /tmp/build/perf/bench/find-bit-bench.o
> CC /tmp/build/perf/arch/x86/util/intel-pt.o
> CC /tmp/build/perf/trace/beauty/sync_file_range.o
> CC /tmp/build/perf/arch/x86/util/intel-bts.o
> MKDIR /tmp/build/perf/trace/beauty/tracepoints/
> MKDIR /tmp/build/perf/ui/browsers/
> CC /tmp/build/perf/trace/beauty/tracepoints/x86_irq_vectors.o
> MKDIR /tmp/build/perf/trace/beauty/tracepoints/
> CC /tmp/build/perf/util/block-range.o
> CC /tmp/build/perf/ui/browsers/annotate.o
> MKDIR /tmp/build/perf/ui/browsers/
> CC /tmp/build/perf/util/build-id.o
> CC /tmp/build/perf/bench/inject-buildid.o
> CC /tmp/build/perf/bench/mem-memcpy-x86-64-asm.o
> MKDIR /tmp/build/perf/ui/tui/
> CC /tmp/build/perf/trace/beauty/tracepoints/x86_msr.o
> MKDIR /tmp/build/perf/ui/tui/
> CC /tmp/build/perf/ui/browsers/hists.o
> CC /tmp/build/perf/ui/browsers/map.o
> LD /tmp/build/perf/arch/x86/util/perf-in.o
> CC /tmp/build/perf/tests/hists_filter.o
> CC /tmp/build/perf/bench/mem-memset-x86-64-asm.o
> CC /tmp/build/perf/ui/tui/setup.o
> CC /tmp/build/perf/ui/tui/util.o
> MKDIR /tmp/build/perf/ui/tui/
> CC /tmp/build/perf/bench/numa.o
> CC /tmp/build/perf/util/cacheline.o
> CC /tmp/build/perf/ui/browsers/scripts.o
> LD /tmp/build/perf/trace/beauty/tracepoints/perf-in.o
> CC /tmp/build/perf/ui/tui/helpline.o
> CC /tmp/build/perf/util/config.o
> CC /tmp/build/perf/ui/tui/progress.o
> CC /tmp/build/perf/ui/browsers/header.o
> LD /tmp/build/perf/trace/beauty/perf-in.o
> CC /tmp/build/perf/ui/browsers/res_sample.o
> CC /tmp/build/perf/tests/hists_output.o
> LD /tmp/build/perf/bench/perf-in.o
> CC /tmp/build/perf/tests/hists_cumulate.o
> CC /tmp/build/perf/util/copyfile.o
> LD /tmp/build/perf/arch/x86/perf-in.o
> CC /tmp/build/perf/util/ctype.o
> CC /tmp/build/perf/util/db-export.o
> CC /tmp/build/perf/util/env.o
> CC /tmp/build/perf/util/event.o
> LD /tmp/build/perf/arch/perf-in.o
> CC /tmp/build/perf/util/evlist.o
> CC /tmp/build/perf/util/sideband_evlist.o
> CC /tmp/build/perf/util/evsel.o
> CC /tmp/build/perf/util/evsel_fprintf.o
> CC /tmp/build/perf/tests/python-use.o
> CC /tmp/build/perf/util/perf_event_attr_fprintf.o
> CC /tmp/build/perf/util/evswitch.o
> CC /tmp/build/perf/util/find_bit.o
> CC /tmp/build/perf/tests/bp_signal.o
> LD /tmp/build/perf/ui/tui/perf-in.o
> CC /tmp/build/perf/util/get_current_dir_name.o
> CC /tmp/build/perf/tests/bp_signal_overflow.o
> CC /tmp/build/perf/util/kallsyms.o
> CC /tmp/build/perf/tests/bp_account.o
> CC /tmp/build/perf/util/llvm-utils.o
> CC /tmp/build/perf/util/levenshtein.o
> CC /tmp/build/perf/util/mmap.o
> CC /tmp/build/perf/tests/wp.o
> CC /tmp/build/perf/util/memswap.o
> CC /tmp/build/perf/util/perf_regs.o
> BISON /tmp/build/perf/util/parse-events-bison.c
> CC /tmp/build/perf/tests/task-exit.o
> CC /tmp/build/perf/util/path.o
> CC /tmp/build/perf/util/print_binary.o
> CC /tmp/build/perf/util/rlimit.o
> CC /tmp/build/perf/tests/sw-clock.o
> CC /tmp/build/perf/tests/mmap-thread-lookup.o
> CC /tmp/build/perf/util/argv_split.o
> CC /tmp/build/perf/util/rbtree.o
> CC /tmp/build/perf/tests/thread-maps-share.o
> CC /tmp/build/perf/util/libstring.o
> CC /tmp/build/perf/tests/switch-tracking.o
> CC /tmp/build/perf/tests/keep-tracking.o
> CC /tmp/build/perf/util/bitmap.o
> CC /tmp/build/perf/util/hweight.o
> CC /tmp/build/perf/util/smt.o
> CC /tmp/build/perf/tests/code-reading.o
> CC /tmp/build/perf/util/strbuf.o
> CC /tmp/build/perf/util/string.o
> CC /tmp/build/perf/tests/sample-parsing.o
> CC /tmp/build/perf/tests/parse-no-sample-id-all.o
> CC /tmp/build/perf/util/strfilter.o
> CC /tmp/build/perf/tests/kmod-path.o
> CC /tmp/build/perf/util/strlist.o
> CC /tmp/build/perf/util/top.o
> CC /tmp/build/perf/tests/thread-map.o
> CC /tmp/build/perf/util/usage.o
> CC /tmp/build/perf/util/dso.o
> CC /tmp/build/perf/util/dsos.o
> CC /tmp/build/perf/util/symbol.o
> CC /tmp/build/perf/util/symbol_fprintf.o
> CC /tmp/build/perf/tests/llvm.o
> CC /tmp/build/perf/util/color.o
> CC /tmp/build/perf/util/color_config.o
> CC /tmp/build/perf/util/metricgroup.o
> CC /tmp/build/perf/util/header.o
> CC /tmp/build/perf/util/callchain.o
> CC /tmp/build/perf/util/values.o
> CC /tmp/build/perf/tests/bpf.o
> CC /tmp/build/perf/util/debug.o
> CC /tmp/build/perf/util/fncache.o
> CC /tmp/build/perf/tests/topology.o
> CC /tmp/build/perf/util/machine.o
> CC /tmp/build/perf/tests/cpumap.o
> CC /tmp/build/perf/util/map.o
> CC /tmp/build/perf/tests/mem.o
> CC /tmp/build/perf/util/pstack.o
> CC /tmp/build/perf/util/session.o
> CC /tmp/build/perf/tests/stat.o
> CC /tmp/build/perf/tests/event_update.o
> LD /tmp/build/perf/ui/browsers/perf-in.o
> CC /tmp/build/perf/tests/event-times.o
> CC /tmp/build/perf/tests/expr.o
> CC /tmp/build/perf/util/sample-raw.o
> CC /tmp/build/perf/util/s390-sample-raw.o
> CC /tmp/build/perf/tests/sdt.o
> CC /tmp/build/perf/util/syscalltbl.o
> CC /tmp/build/perf/tests/is_printable_array.o
> CC /tmp/build/perf/util/ordered-events.o
> CC /tmp/build/perf/tests/backward-ring-buffer.o
> CC /tmp/build/perf/tests/bitmap.o
> CC /tmp/build/perf/util/namespaces.o
> CC /tmp/build/perf/tests/perf-hooks.o
> CC /tmp/build/perf/tests/clang.o
> CC /tmp/build/perf/util/comm.o
> CC /tmp/build/perf/tests/unit_number__scnprintf.o
> CC /tmp/build/perf/tests/mem2node.o
> CC /tmp/build/perf/tests/maps.o
> CC /tmp/build/perf/util/thread.o
> CC /tmp/build/perf/util/thread_map.o
> CC /tmp/build/perf/tests/time-utils-test.o
> CC /tmp/build/perf/tests/genelf.o
> CC /tmp/build/perf/util/trace-event-parse.o
> BISON /tmp/build/perf/util/pmu-bison.c
> CC /tmp/build/perf/util/trace-event-read.o
> CC /tmp/build/perf/tests/api-io.o
> CC /tmp/build/perf/util/trace-event-info.o
> CC /tmp/build/perf/util/trace-event-scripting.o
> CC /tmp/build/perf/tests/pfm.o
> CC /tmp/build/perf/tests/demangle-java-test.o
> CC /tmp/build/perf/util/trace-event.o
> LD /tmp/build/perf/ui/perf-in.o
> CC /tmp/build/perf/tests/parse-metric.o
> CC /tmp/build/perf/tests/pe-file-parsing.o
> CC /tmp/build/perf/tests/expand-cgroup.o
> CC /tmp/build/perf/tests/perf-time-to-tsc.o
> CC /tmp/build/perf/util/svghelper.o
> CC /tmp/build/perf/util/sort.o
> CC /tmp/build/perf/util/hist.o
> CC /tmp/build/perf/tests/dwarf-unwind.o
> CC /tmp/build/perf/tests/llvm-src-base.o
> CC /tmp/build/perf/util/cpumap.o
> CC /tmp/build/perf/util/util.o
> CC /tmp/build/perf/util/affinity.o
> CC /tmp/build/perf/util/cputopo.o
> CC /tmp/build/perf/util/target.o
> CC /tmp/build/perf/util/cgroup.o
> CC /tmp/build/perf/tests/llvm-src-kbuild.o
> CC /tmp/build/perf/util/rblist.o
> CC /tmp/build/perf/tests/llvm-src-prologue.o
> CC /tmp/build/perf/tests/llvm-src-relocation.o
> CC /tmp/build/perf/util/intlist.o
> CC /tmp/build/perf/util/counts.o
> CC /tmp/build/perf/util/vdso.o
> CC /tmp/build/perf/util/stat.o
> CC /tmp/build/perf/util/stat-shadow.o
> CC /tmp/build/perf/util/stat-display.o
> CC /tmp/build/perf/util/perf_api_probe.o
> CC /tmp/build/perf/util/record.o
> CC /tmp/build/perf/util/srcline.o
> LD /tmp/build/perf/tests/perf-in.o
> CC /tmp/build/perf/util/srccode.o
> CC /tmp/build/perf/util/synthetic-events.o
> CC /tmp/build/perf/util/data.o
> CC /tmp/build/perf/util/cloexec.o
> CC /tmp/build/perf/util/tsc.o
> CC /tmp/build/perf/util/rwsem.o
> CC /tmp/build/perf/util/call-path.o
> CC /tmp/build/perf/util/thread-stack.o
> CC /tmp/build/perf/util/spark.o
> CC /tmp/build/perf/util/topdown.o
> CC /tmp/build/perf/util/auxtrace.o
> CC /tmp/build/perf/util/intel-pt.o
> CC /tmp/build/perf/util/stream.o
> CC /tmp/build/perf/util/intel-bts.o
> MKDIR /tmp/build/perf/util/arm-spe-decoder/
> CC /tmp/build/perf/util/arm-spe.o
> MKDIR /tmp/build/perf/util/intel-pt-decoder/
> MKDIR /tmp/build/perf/util/arm-spe-decoder/
> CC /tmp/build/perf/util/s390-cpumsf.o
> MKDIR /tmp/build/perf/util/intel-pt-decoder/
> MKDIR /tmp/build/perf/util/scripting-engines/
> MKDIR /tmp/build/perf/util/intel-pt-decoder/
> MKDIR /tmp/build/perf/util/scripting-engines/
> CC /tmp/build/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.o
> GEN /tmp/build/perf/util/intel-pt-decoder/inat-tables.c
> CC /tmp/build/perf/util/arm-spe-decoder/arm-spe-decoder.o
> CC /tmp/build/perf/util/scripting-engines/trace-event-perl.o
> CC /tmp/build/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.o
> CC /tmp/build/perf/util/intel-pt-decoder/intel-pt-log.o
> CC /tmp/build/perf/util/dump-insn.o
> CC /tmp/build/perf/util/parse-branch-options.o
> CC /tmp/build/perf/util/scripting-engines/trace-event-python.o
> CC /tmp/build/perf/util/parse-regs-options.o
> CC /tmp/build/perf/util/parse-sublevel-options.o
> MKDIR /tmp/build/perf/util/intel-pt-decoder/
> CC /tmp/build/perf/util/term.o
> CC /tmp/build/perf/util/help-unknown-cmd.o
> LD /tmp/build/perf/util/arm-spe-decoder/perf-in.o
> CC /tmp/build/perf/util/mem-events.o
> CC /tmp/build/perf/util/vsprintf.o
> CC /tmp/build/perf/util/units.o
> CC /tmp/build/perf/util/intel-pt-decoder/intel-pt-decoder.o
> BISON /tmp/build/perf/util/expr-bison.c
> CC /tmp/build/perf/util/time-utils.o
> CC /tmp/build/perf/util/branch.o
> CC /tmp/build/perf/util/mem2node.o
> CC /tmp/build/perf/util/clockid.o
> CC /tmp/build/perf/util/bpf-loader.o
> CC /tmp/build/perf/util/bpf_map.o
> CC /tmp/build/perf/util/bpf_counter.o
> CC /tmp/build/perf/util/bpf-prologue.o
> CC /tmp/build/perf/util/symbol-elf.o
> CC /tmp/build/perf/util/probe-file.o
> CC /tmp/build/perf/util/probe-event.o
> CC /tmp/build/perf/util/probe-finder.o
> CC /tmp/build/perf/util/dwarf-aux.o
> CC /tmp/build/perf/util/dwarf-regs.o
> LD /tmp/build/perf/util/scripting-engines/perf-in.o
> CC /tmp/build/perf/util/unwind-libunwind-local.o
> CC /tmp/build/perf/util/unwind-libunwind.o
> CC /tmp/build/perf/util/intel-pt-decoder/intel-pt-insn-decoder.o
> CC /tmp/build/perf/util/data-convert-bt.o
> CC /tmp/build/perf/util/zlib.o
> CC /tmp/build/perf/util/lzma.o
> CC /tmp/build/perf/util/cap.o
> CC /tmp/build/perf/util/zstd.o
> CC /tmp/build/perf/util/demangle-java.o
> CC /tmp/build/perf/util/demangle-rust.o
> CC /tmp/build/perf/util/genelf.o
> CC /tmp/build/perf/util/jitdump.o
> CC /tmp/build/perf/util/genelf_debug.o
> CC /tmp/build/perf/util/perf-hooks.o
> CC /tmp/build/perf/util/bpf-event.o
> FLEX /tmp/build/perf/util/pmu-flex.c
> CC /tmp/build/perf/util/pmu-bison.o
> CC /tmp/build/perf/util/pmu.o
> CC /tmp/build/perf/util/pmu-flex.o
> FLEX /tmp/build/perf/util/parse-events-flex.c
> CC /tmp/build/perf/util/parse-events-bison.o
> FLEX /tmp/build/perf/util/expr-flex.c
> CC /tmp/build/perf/util/expr-bison.o
> LD /tmp/build/perf/util/intel-pt-decoder/perf-in.o
> CC /tmp/build/perf/util/parse-events.o
> CC /tmp/build/perf/util/parse-events-flex.o
> CC /tmp/build/perf/util/expr-flex.o
> CC /tmp/build/perf/util/expr.o
> LD /tmp/build/perf/scripts/perl/Perf-Trace-Util/perf-in.o
> LD /tmp/build/perf/scripts/perf-in.o
> LD /tmp/build/perf/util/perf-in.o
> LD /tmp/build/perf/perf-in.o
> LINK /tmp/build/perf/perf
> INSTALL tests
> INSTALL binaries
> INSTALL libperf-jvmti.so
> INSTALL libexec
> INSTALL bpf-headers
> INSTALL bpf-examples
> INSTALL perf-archive
> INSTALL perf-with-kcore
> INSTALL strace/groups
> INSTALL perl-scripts
> INSTALL python-scripts
> INSTALL perf_completion-script
> INSTALL perf-tip
> make: Leaving directory '/home/acme/git/perf/tools/perf'
> [acme@five perf]$
>
>> Signed-off-by: Song Liu <songliubraving@xxxxxx>
>> ---
>> tools/perf/Makefile.perf | 2 +-
>> tools/perf/builtin-stat.c | 77 ++++-
>> tools/perf/util/Build | 1 +
>> tools/perf/util/bpf_counter.c | 296 ++++++++++++++++++
>> tools/perf/util/bpf_counter.h | 72 +++++
>> .../util/bpf_skel/bpf_prog_profiler.bpf.c | 93 ++++++
>> tools/perf/util/evsel.c | 9 +
>> tools/perf/util/evsel.h | 6 +
>> tools/perf/util/stat-display.c | 4 +-
>> tools/perf/util/stat.c | 2 +-
>> tools/perf/util/target.c | 34 +-
>> tools/perf/util/target.h | 10 +
>> 12 files changed, 588 insertions(+), 18 deletions(-)
>> create mode 100644 tools/perf/util/bpf_counter.c
>> create mode 100644 tools/perf/util/bpf_counter.h
>> create mode 100644 tools/perf/util/bpf_skel/bpf_prog_profiler.bpf.c
>>
>> diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
>> index d182a2dbb9bbd..8c4e039c3b813 100644
>> --- a/tools/perf/Makefile.perf
>> +++ b/tools/perf/Makefile.perf
>> @@ -1015,7 +1015,7 @@ python-clean:
>>
>> SKEL_OUT := $(abspath $(OUTPUT)util/bpf_skel)
>> SKEL_TMP_OUT := $(abspath $(SKEL_OUT)/.tmp)
>> -SKELETONS :=
>> +SKELETONS := $(SKEL_OUT)/bpf_prog_profiler.skel.h
>>
>> ifdef BUILD_BPF_SKEL
>> BPFTOOL := $(SKEL_TMP_OUT)/bootstrap/bpftool
>> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
>> index 8cc24967bc273..09bffb3fbcdd4 100644
>> --- a/tools/perf/builtin-stat.c
>> +++ b/tools/perf/builtin-stat.c
>> @@ -67,6 +67,7 @@
>> #include "util/top.h"
>> #include "util/affinity.h"
>> #include "util/pfm.h"
>> +#include "util/bpf_counter.h"
>> #include "asm/bug.h"
>>
>> #include <linux/time64.h>
>> @@ -409,12 +410,31 @@ static int read_affinity_counters(struct timespec *rs)
>> return 0;
>> }
>>
>> +static int read_bpf_map_counters(void)
>> +{
>> + struct evsel *counter;
>> + int err;
>> +
>> + evlist__for_each_entry(evsel_list, counter) {
>> + err = bpf_counter__read(counter);
>> + if (err)
>> + return err;
>> + }
>> + return 0;
>> +}
>> +
>> static void read_counters(struct timespec *rs)
>> {
>> struct evsel *counter;
>> + int err;
>>
>> - if (!stat_config.stop_read_counter && (read_affinity_counters(rs) < 0))
>> - return;
>> + if (!stat_config.stop_read_counter) {
>> + err = read_bpf_map_counters();
>> + if (err == -EAGAIN)
>> + err = read_affinity_counters(rs);
>> + if (err < 0)
>> + return;
>> + }
>>
>> evlist__for_each_entry(evsel_list, counter) {
>> if (counter->err)
>> @@ -496,11 +516,20 @@ static bool handle_interval(unsigned int interval, int *times)
>> return false;
>> }
>>
>> -static void enable_counters(void)
>> +static int enable_counters(void)
>> {
>> + struct evsel *evsel;
>> + int err;
>> +
>> + evlist__for_each_entry(evsel_list, evsel) {
>> + err = bpf_counter__enable(evsel);
>> + if (err)
>> + return err;
>> + }
>> +
>> if (stat_config.initial_delay < 0) {
>> pr_info(EVLIST_DISABLED_MSG);
>> - return;
>> + return 0;
>> }
>>
>> if (stat_config.initial_delay > 0) {
>> @@ -518,6 +547,7 @@ static void enable_counters(void)
>> if (stat_config.initial_delay > 0)
>> pr_info(EVLIST_ENABLED_MSG);
>> }
>> + return 0;
>> }
>>
>> static void disable_counters(void)
>> @@ -720,7 +750,7 @@ static int __run_perf_stat(int argc, const char **argv, int run_idx)
>> const bool forks = (argc > 0);
>> bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false;
>> struct affinity affinity;
>> - int i, cpu;
>> + int i, cpu, err;
>> bool second_pass = false;
>>
>> if (forks) {
>> @@ -737,6 +767,11 @@ static int __run_perf_stat(int argc, const char **argv, int run_idx)
>> if (affinity__setup(&affinity) < 0)
>> return -1;
>>
>> + evlist__for_each_entry(evsel_list, counter) {
>> + if (bpf_counter__load(counter, &target))
>> + return -1;
>> + }
>> +
>> evlist__for_each_cpu (evsel_list, i, cpu) {
>> affinity__set(&affinity, cpu);
>>
>> @@ -850,7 +885,7 @@ static int __run_perf_stat(int argc, const char **argv, int run_idx)
>> }
>>
>> if (STAT_RECORD) {
>> - int err, fd = perf_data__fd(&perf_stat.data);
>> + int fd = perf_data__fd(&perf_stat.data);
>>
>> if (is_pipe) {
>> err = perf_header__write_pipe(perf_data__fd(&perf_stat.data));
>> @@ -876,7 +911,9 @@ static int __run_perf_stat(int argc, const char **argv, int run_idx)
>>
>> if (forks) {
>> evlist__start_workload(evsel_list);
>> - enable_counters();
>> + err = enable_counters();
>> + if (err)
>> + return -1;
>>
>> if (interval || timeout || evlist__ctlfd_initialized(evsel_list))
>> status = dispatch_events(forks, timeout, interval, ×);
>> @@ -895,7 +932,9 @@ static int __run_perf_stat(int argc, const char **argv, int run_idx)
>> if (WIFSIGNALED(status))
>> psignal(WTERMSIG(status), argv[0]);
>> } else {
>> - enable_counters();
>> + err = enable_counters();
>> + if (err)
>> + return -1;
>> status = dispatch_events(forks, timeout, interval, ×);
>> }
>>
>> @@ -1085,6 +1124,10 @@ static struct option stat_options[] = {
>> "stat events on existing process id"),
>> OPT_STRING('t', "tid", &target.tid, "tid",
>> "stat events on existing thread id"),
>> +#ifdef HAVE_BPF_SKEL
>> + OPT_STRING('b', "bpf-prog", &target.bpf_str, "bpf-prog-id",
>> + "stat events on existing bpf program id"),
>> +#endif
>> OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
>> "system-wide collection from all CPUs"),
>> OPT_BOOLEAN('g', "group", &group,
>> @@ -2064,11 +2107,12 @@ int cmd_stat(int argc, const char **argv)
>> "perf stat [<options>] [<command>]",
>> NULL
>> };
>> - int status = -EINVAL, run_idx;
>> + int status = -EINVAL, run_idx, err;
>> const char *mode;
>> FILE *output = stderr;
>> unsigned int interval, timeout;
>> const char * const stat_subcommands[] = { "record", "report" };
>> + char errbuf[BUFSIZ];
>>
>> setlocale(LC_ALL, "");
>>
>> @@ -2179,6 +2223,12 @@ int cmd_stat(int argc, const char **argv)
>> } else if (big_num_opt == 0) /* User passed --no-big-num */
>> stat_config.big_num = false;
>>
>> + err = target__validate(&target);
>> + if (err) {
>> + target__strerror(&target, err, errbuf, BUFSIZ);
>> + pr_warning("%s\n", errbuf);
>> + }
>> +
>> setup_system_wide(argc);
>>
>> /*
>> @@ -2252,8 +2302,6 @@ int cmd_stat(int argc, const char **argv)
>> }
>> }
>>
>> - target__validate(&target);
>> -
>> if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide))
>> target.per_thread = true;
>>
>> @@ -2384,9 +2432,10 @@ int cmd_stat(int argc, const char **argv)
>> * tools remain -acme
>> */
>> int fd = perf_data__fd(&perf_stat.data);
>> - int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
>> - process_synthesized_event,
>> - &perf_stat.session->machines.host);
>> +
>> + err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
>> + process_synthesized_event,
>> + &perf_stat.session->machines.host);
>> if (err) {
>> pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
>> "older tools may produce warnings about this file\n.");
>> diff --git a/tools/perf/util/Build b/tools/perf/util/Build
>> index e2563d0154eb6..188521f343470 100644
>> --- a/tools/perf/util/Build
>> +++ b/tools/perf/util/Build
>> @@ -135,6 +135,7 @@ perf-y += clockid.o
>>
>> perf-$(CONFIG_LIBBPF) += bpf-loader.o
>> perf-$(CONFIG_LIBBPF) += bpf_map.o
>> +perf-$(CONFIG_PERF_BPF_SKEL) += bpf_counter.o
>> perf-$(CONFIG_BPF_PROLOGUE) += bpf-prologue.o
>> perf-$(CONFIG_LIBELF) += symbol-elf.o
>> perf-$(CONFIG_LIBELF) += probe-file.o
>> diff --git a/tools/perf/util/bpf_counter.c b/tools/perf/util/bpf_counter.c
>> new file mode 100644
>> index 0000000000000..f2cb86a40c882
>> --- /dev/null
>> +++ b/tools/perf/util/bpf_counter.c
>> @@ -0,0 +1,296 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +
>> +/* Copyright (c) 2019 Facebook */
>> +
>> +#include <limits.h>
>> +#include <unistd.h>
>> +#include <sys/time.h>
>> +#include <sys/resource.h>
>> +#include <linux/err.h>
>> +#include <linux/zalloc.h>
>> +#include <bpf/bpf.h>
>> +#include <bpf/btf.h>
>> +#include <bpf/libbpf.h>
>> +
>> +#include "bpf_counter.h"
>> +#include "counts.h"
>> +#include "debug.h"
>> +#include "evsel.h"
>> +#include "target.h"
>> +
>> +#include "bpf_skel/bpf_prog_profiler.skel.h"
>> +
>> +static inline void *u64_to_ptr(__u64 ptr)
>> +{
>> + return (void *)(unsigned long)ptr;
>> +}
>> +
>> +static void set_max_rlimit(void)
>> +{
>> + struct rlimit rinf = { RLIM_INFINITY, RLIM_INFINITY };
>> +
>> + setrlimit(RLIMIT_MEMLOCK, &rinf);
>> +}
>> +
>> +static struct bpf_counter *bpf_counter_alloc(void)
>> +{
>> + struct bpf_counter *counter;
>> +
>> + counter = zalloc(sizeof(*counter));
>> + if (counter)
>> + INIT_LIST_HEAD(&counter->list);
>> + return counter;
>> +}
>> +
>> +static int bpf_program_profiler__destroy(struct evsel *evsel)
>> +{
>> + struct bpf_counter *counter;
>> +
>> + list_for_each_entry(counter, &evsel->bpf_counter_list, list)
>> + bpf_prog_profiler_bpf__destroy(counter->skel);
>> + INIT_LIST_HEAD(&evsel->bpf_counter_list);
>> + return 0;
>> +}
>> +
>> +static char *bpf_target_prog_name(int tgt_fd)
>> +{
>> + struct bpf_prog_info_linear *info_linear;
>> + struct bpf_func_info *func_info;
>> + const struct btf_type *t;
>> + char *name = NULL;
>> + struct btf *btf;
>> +
>> + info_linear = bpf_program__get_prog_info_linear(
>> + tgt_fd, 1UL << BPF_PROG_INFO_FUNC_INFO);
>> + if (IS_ERR_OR_NULL(info_linear)) {
>> + pr_debug("failed to get info_linear for prog FD %d\n", tgt_fd);
>> + return NULL;
>> + }
>> +
>> + if (info_linear->info.btf_id == 0 ||
>> + btf__get_from_id(info_linear->info.btf_id, &btf)) {
>> + pr_debug("prog FD %d doesn't have valid btf\n", tgt_fd);
>> + goto out;
>> + }
>> +
>> + func_info = u64_to_ptr(info_linear->info.func_info);
>> + t = btf__type_by_id(btf, func_info[0].type_id);
>> + if (!t) {
>> + pr_debug("btf %d doesn't have type %d\n",
>> + info_linear->info.btf_id, func_info[0].type_id);
>> + goto out;
>> + }
>> + name = strdup(btf__name_by_offset(btf, t->name_off));
>> +out:
>> + free(info_linear);
>> + return name;
>> +}
>> +
>> +static int bpf_program_profiler_load_one(struct evsel *evsel, u32 prog_id)
>> +{
>> + struct bpf_prog_profiler_bpf *skel;
>> + struct bpf_counter *counter;
>> + struct bpf_program *prog;
>> + char *prog_name;
>> + int prog_fd;
>> + int err;
>> +
>> + prog_fd = bpf_prog_get_fd_by_id(prog_id);
>> + if (prog_fd < 0) {
>> + pr_err("Failed to open fd for bpf prog %u\n", prog_id);
>> + return -1;
>> + }
>> + counter = bpf_counter_alloc();
>> + if (!counter) {
>> + close(prog_fd);
>> + return -1;
>> + }
>> +
>> + skel = bpf_prog_profiler_bpf__open();
>> + if (!skel) {
>> + pr_err("Failed to open bpf skeleton\n");
>> + goto err_out;
>> + }
>> + skel->rodata->num_cpu = evsel__nr_cpus(evsel);
>> +
>> + bpf_map__resize(skel->maps.events, evsel__nr_cpus(evsel));
>> + bpf_map__resize(skel->maps.fentry_readings, 1);
>> + bpf_map__resize(skel->maps.accum_readings, 1);
>> +
>> + prog_name = bpf_target_prog_name(prog_fd);
>> + if (!prog_name) {
>> + pr_err("Failed to get program name for bpf prog %u. Does it have BTF?\n", prog_id);
>> + goto err_out;
>> + }
>> +
>> + bpf_object__for_each_program(prog, skel->obj) {
>> + err = bpf_program__set_attach_target(prog, prog_fd, prog_name);
>> + if (err) {
>> + pr_err("bpf_program__set_attach_target failed.\n"
>> + "Does bpf prog %u have BTF?\n", prog_id);
>> + goto err_out;
>> + }
>> + }
>> + set_max_rlimit();
>> + err = bpf_prog_profiler_bpf__load(skel);
>> + if (err) {
>> + pr_err("bpf_prog_profiler_bpf__load failed\n");
>> + goto err_out;
>> + }
>> +
>> + counter->skel = skel;
>> + list_add(&counter->list, &evsel->bpf_counter_list);
>> + close(prog_fd);
>> + return 0;
>> +err_out:
>> + free(counter);
>> + close(prog_fd);
>> + return -1;
>> +}
>> +
>> +static int bpf_program_profiler__load(struct evsel *evsel, struct target *target)
>> +{
>> + char *bpf_str, *bpf_str_, *tok, *saveptr = NULL, *p;
>> + u32 prog_id;
>> + int ret;
>> +
>> + bpf_str_ = bpf_str = strdup(target->bpf_str);
>> + if (!bpf_str)
>> + return -1;
>> +
>> + while ((tok = strtok_r(bpf_str, ",", &saveptr)) != NULL) {
>> + prog_id = strtoul(tok, &p, 10);
>> + if (prog_id == 0 || prog_id == UINT_MAX ||
>> + (*p != '\0' && *p != ',')) {
>> + pr_err("Failed to parse bpf prog ids %s\n",
>> + target->bpf_str);
>> + return -1;
>> + }
>> +
>> + ret = bpf_program_profiler_load_one(evsel, prog_id);
>> + if (ret) {
>> + bpf_program_profiler__destroy(evsel);
>> + free(bpf_str_);
>> + return -1;
>> + }
>> + bpf_str = NULL;
>> + }
>> + free(bpf_str_);
>> + return 0;
>> +}
>> +
>> +static int bpf_program_profiler__enable(struct evsel *evsel)
>> +{
>> + struct bpf_counter *counter;
>> + int ret;
>> +
>> + list_for_each_entry(counter, &evsel->bpf_counter_list, list) {
>> + ret = bpf_prog_profiler_bpf__attach(counter->skel);
>> + if (ret) {
>> + bpf_program_profiler__destroy(evsel);
>> + return ret;
>> + }
>> + }
>> + return 0;
>> +}
>> +
>> +static int bpf_program_profiler__read(struct evsel *evsel)
>> +{
>> + int num_cpu = evsel__nr_cpus(evsel);
>> + struct bpf_perf_event_value values[num_cpu];
>> + struct bpf_counter *counter;
>> + int reading_map_fd;
>> + __u32 key = 0;
>> + int err, cpu;
>> +
>> + if (list_empty(&evsel->bpf_counter_list))
>> + return -EAGAIN;
>> +
>> + for (cpu = 0; cpu < num_cpu; cpu++) {
>> + perf_counts(evsel->counts, cpu, 0)->val = 0;
>> + perf_counts(evsel->counts, cpu, 0)->ena = 0;
>> + perf_counts(evsel->counts, cpu, 0)->run = 0;
>> + }
>> + list_for_each_entry(counter, &evsel->bpf_counter_list, list) {
>> + struct bpf_prog_profiler_bpf *skel = counter->skel;
>> +
>> + reading_map_fd = bpf_map__fd(skel->maps.accum_readings);
>> +
>> + err = bpf_map_lookup_elem(reading_map_fd, &key, values);
>> + if (err) {
>> + fprintf(stderr, "failed to read value\n");
>> + return err;
>> + }
>> +
>> + for (cpu = 0; cpu < num_cpu; cpu++) {
>> + perf_counts(evsel->counts, cpu, 0)->val += values[cpu].counter;
>> + perf_counts(evsel->counts, cpu, 0)->ena += values[cpu].enabled;
>> + perf_counts(evsel->counts, cpu, 0)->run += values[cpu].running;
>> + }
>> + }
>> + return 0;
>> +}
>> +
>> +static int bpf_program_profiler__install_pe(struct evsel *evsel, int cpu,
>> + int fd)
>> +{
>> + struct bpf_prog_profiler_bpf *skel;
>> + struct bpf_counter *counter;
>> + int ret;
>> +
>> + list_for_each_entry(counter, &evsel->bpf_counter_list, list) {
>> + skel = counter->skel;
>> + ret = bpf_map_update_elem(bpf_map__fd(skel->maps.events),
>> + &cpu, &fd, BPF_ANY);
>> + if (ret)
>> + return ret;
>> + }
>> + return 0;
>> +}
>> +
>> +struct bpf_counter_ops bpf_program_profiler_ops = {
>> + .load = bpf_program_profiler__load,
>> + .enable = bpf_program_profiler__enable,
>> + .read = bpf_program_profiler__read,
>> + .destroy = bpf_program_profiler__destroy,
>> + .install_pe = bpf_program_profiler__install_pe,
>> +};
>> +
>> +int bpf_counter__install_pe(struct evsel *evsel, int cpu, int fd)
>> +{
>> + if (list_empty(&evsel->bpf_counter_list))
>> + return 0;
>> + return evsel->bpf_counter_ops->install_pe(evsel, cpu, fd);
>> +}
>> +
>> +int bpf_counter__load(struct evsel *evsel, struct target *target)
>> +{
>> + if (target__has_bpf(target))
>> + evsel->bpf_counter_ops = &bpf_program_profiler_ops;
>> +
>> + if (evsel->bpf_counter_ops)
>> + return evsel->bpf_counter_ops->load(evsel, target);
>> + return 0;
>> +}
>> +
>> +int bpf_counter__enable(struct evsel *evsel)
>> +{
>> + if (list_empty(&evsel->bpf_counter_list))
>> + return 0;
>> + return evsel->bpf_counter_ops->enable(evsel);
>> +}
>> +
>> +int bpf_counter__read(struct evsel *evsel)
>> +{
>> + if (list_empty(&evsel->bpf_counter_list))
>> + return -EAGAIN;
>> + return evsel->bpf_counter_ops->read(evsel);
>> +}
>> +
>> +void bpf_counter__destroy(struct evsel *evsel)
>> +{
>> + if (list_empty(&evsel->bpf_counter_list))
>> + return;
>> + evsel->bpf_counter_ops->destroy(evsel);
>> + evsel->bpf_counter_ops = NULL;
>> +}
>> diff --git a/tools/perf/util/bpf_counter.h b/tools/perf/util/bpf_counter.h
>> new file mode 100644
>> index 0000000000000..2eca210e5dc16
>> --- /dev/null
>> +++ b/tools/perf/util/bpf_counter.h
>> @@ -0,0 +1,72 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +#ifndef __PERF_BPF_COUNTER_H
>> +#define __PERF_BPF_COUNTER_H 1
>> +
>> +#include <linux/list.h>
>> +
>> +struct evsel;
>> +struct target;
>> +struct bpf_counter;
>> +
>> +typedef int (*bpf_counter_evsel_op)(struct evsel *evsel);
>> +typedef int (*bpf_counter_evsel_target_op)(struct evsel *evsel,
>> + struct target *target);
>> +typedef int (*bpf_counter_evsel_install_pe_op)(struct evsel *evsel,
>> + int cpu,
>> + int fd);
>> +
>> +struct bpf_counter_ops {
>> + bpf_counter_evsel_target_op load;
>> + bpf_counter_evsel_op enable;
>> + bpf_counter_evsel_op read;
>> + bpf_counter_evsel_op destroy;
>> + bpf_counter_evsel_install_pe_op install_pe;
>> +};
>> +
>> +struct bpf_counter {
>> + void *skel;
>> + struct list_head list;
>> +};
>> +
>> +#ifdef HAVE_BPF_SKEL
>> +
>> +int bpf_counter__load(struct evsel *evsel, struct target *target);
>> +int bpf_counter__enable(struct evsel *evsel);
>> +int bpf_counter__read(struct evsel *evsel);
>> +void bpf_counter__destroy(struct evsel *evsel);
>> +int bpf_counter__install_pe(struct evsel *evsel, int cpu, int fd);
>> +
>> +#else /* HAVE_BPF_SKEL */
>> +
>> +#include<linux/err.h>
>> +
>> +static inline int bpf_counter__load(struct evsel *evsel __maybe_unused,
>> + struct target *target __maybe_unused)
>> +{
>> + return 0;
>> +}
>> +
>> +static inline int bpf_counter__enable(struct evsel *evsel __maybe_unused)
>> +{
>> + return 0;
>> +}
>> +
>> +static inline int bpf_counter__read(struct evsel *evsel __maybe_unused)
>> +{
>> + return -EAGAIN;
>> +}
>> +
>> +static inline void bpf_counter__destroy(struct evsel *evsel __maybe_unused)
>> +{
>> +}
>> +
>> +static inline int bpf_counter__install_pe(struct evsel *evsel __maybe_unused,
>> + int cpu __maybe_unused,
>> + int fd __maybe_unused)
>> +{
>> + return 0;
>> +}
>> +
>> +#endif /* HAVE_BPF_SKEL */
>> +
>> +#endif /* __PERF_BPF_COUNTER_H */
>> diff --git a/tools/perf/util/bpf_skel/bpf_prog_profiler.bpf.c b/tools/perf/util/bpf_skel/bpf_prog_profiler.bpf.c
>> new file mode 100644
>> index 0000000000000..c7cec92d02360
>> --- /dev/null
>> +++ b/tools/perf/util/bpf_skel/bpf_prog_profiler.bpf.c
>> @@ -0,0 +1,93 @@
>> +// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +// Copyright (c) 2020 Facebook
>> +#include <linux/bpf.h>
>> +#include <bpf/bpf_helpers.h>
>> +#include <bpf/bpf_tracing.h>
>> +
>> +/* map of perf event fds, num_cpu * num_metric entries */
>> +struct {
>> + __uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);
>> + __uint(key_size, sizeof(__u32));
>> + __uint(value_size, sizeof(int));
>> +} events SEC(".maps");
>> +
>> +/* readings at fentry */
>> +struct {
>> + __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);
>> + __uint(key_size, sizeof(__u32));
>> + __uint(value_size, sizeof(struct bpf_perf_event_value));
>> + __uint(max_entries, 1);
>> +} fentry_readings SEC(".maps");
>> +
>> +/* accumulated readings */
>> +struct {
>> + __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);
>> + __uint(key_size, sizeof(__u32));
>> + __uint(value_size, sizeof(struct bpf_perf_event_value));
>> + __uint(max_entries, 1);
>> +} accum_readings SEC(".maps");
>> +
>> +const volatile __u32 num_cpu = 1;
>> +
>> +SEC("fentry/XXX")
>> +int BPF_PROG(fentry_XXX)
>> +{
>> + __u32 key = bpf_get_smp_processor_id();
>> + struct bpf_perf_event_value *ptr;
>> + __u32 zero = 0;
>> + long err;
>> +
>> + /* look up before reading, to reduce error */
>> + ptr = bpf_map_lookup_elem(&fentry_readings, &zero);
>> + if (!ptr)
>> + return 0;
>> +
>> + err = bpf_perf_event_read_value(&events, key, ptr, sizeof(*ptr));
>> + if (err)
>> + return 0;
>> +
>> + return 0;
>> +}
>> +
>> +static inline void
>> +fexit_update_maps(struct bpf_perf_event_value *after)
>> +{
>> + struct bpf_perf_event_value *before, diff, *accum;
>> + __u32 zero = 0;
>> +
>> + before = bpf_map_lookup_elem(&fentry_readings, &zero);
>> + /* only account samples with a valid fentry_reading */
>> + if (before && before->counter) {
>> + struct bpf_perf_event_value *accum;
>> +
>> + diff.counter = after->counter - before->counter;
>> + diff.enabled = after->enabled - before->enabled;
>> + diff.running = after->running - before->running;
>> +
>> + accum = bpf_map_lookup_elem(&accum_readings, &zero);
>> + if (accum) {
>> + accum->counter += diff.counter;
>> + accum->enabled += diff.enabled;
>> + accum->running += diff.running;
>> + }
>> + }
>> +}
>> +
>> +SEC("fexit/XXX")
>> +int BPF_PROG(fexit_XXX)
>> +{
>> + struct bpf_perf_event_value reading;
>> + __u32 cpu = bpf_get_smp_processor_id();
>> + __u32 one = 1, zero = 0;
>> + int err;
>> +
>> + /* read all events before updating the maps, to reduce error */
>> + err = bpf_perf_event_read_value(&events, cpu, &reading, sizeof(reading));
>> + if (err)
>> + return 0;
>> +
>> + fexit_update_maps(&reading);
>> + return 0;
>> +}
>> +
>> +char LICENSE[] SEC("license") = "Dual BSD/GPL";
>> diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
>> index c26ea82220bd8..7265308765d73 100644
>> --- a/tools/perf/util/evsel.c
>> +++ b/tools/perf/util/evsel.c
>> @@ -25,6 +25,7 @@
>> #include <stdlib.h>
>> #include <perf/evsel.h>
>> #include "asm/bug.h"
>> +#include "bpf_counter.h"
>> #include "callchain.h"
>> #include "cgroup.h"
>> #include "counts.h"
>> @@ -51,6 +52,10 @@
>> #include <internal/lib.h>
>>
>> #include <linux/ctype.h>
>> +#include <bpf/bpf.h>
>> +#include <bpf/libbpf.h>
>> +#include <bpf/btf.h>
>> +#include "rlimit.h"
>>
>> struct perf_missing_features perf_missing_features;
>>
>> @@ -247,6 +252,7 @@ void evsel__init(struct evsel *evsel,
>> evsel->bpf_obj = NULL;
>> evsel->bpf_fd = -1;
>> INIT_LIST_HEAD(&evsel->config_terms);
>> + INIT_LIST_HEAD(&evsel->bpf_counter_list);
>> perf_evsel__object.init(evsel);
>> evsel->sample_size = __evsel__sample_size(attr->sample_type);
>> evsel__calc_id_pos(evsel);
>> @@ -1366,6 +1372,7 @@ void evsel__exit(struct evsel *evsel)
>> {
>> assert(list_empty(&evsel->core.node));
>> assert(evsel->evlist == NULL);
>> + bpf_counter__destroy(evsel);
>> evsel__free_counts(evsel);
>> perf_evsel__free_fd(&evsel->core);
>> perf_evsel__free_id(&evsel->core);
>> @@ -1781,6 +1788,8 @@ static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus,
>>
>> FD(evsel, cpu, thread) = fd;
>>
>> + bpf_counter__install_pe(evsel, cpu, fd);
>> +
>> if (unlikely(test_attr__enabled)) {
>> test_attr__open(&evsel->core.attr, pid, cpus->map[cpu],
>> fd, group_fd, flags);
>> diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
>> index cd1d8dd431997..40e3946cd7518 100644
>> --- a/tools/perf/util/evsel.h
>> +++ b/tools/perf/util/evsel.h
>> @@ -10,6 +10,7 @@
>> #include <internal/evsel.h>
>> #include <perf/evsel.h>
>> #include "symbol_conf.h"
>> +#include "bpf_counter.h"
>> #include <internal/cpumap.h>
>>
>> struct bpf_object;
>> @@ -17,6 +18,8 @@ struct cgroup;
>> struct perf_counts;
>> struct perf_stat_evsel;
>> union perf_event;
>> +struct bpf_counter_ops;
>> +struct target;
>>
>> typedef int (evsel__sb_cb_t)(union perf_event *event, void *data);
>>
>> @@ -127,6 +130,8 @@ struct evsel {
>> * See also evsel__has_callchain().
>> */
>> __u64 synth_sample_type;
>> + struct list_head bpf_counter_list;
>> + struct bpf_counter_ops *bpf_counter_ops;
>> };
>>
>> struct perf_missing_features {
>> @@ -424,4 +429,5 @@ static inline bool evsel__is_dummy_event(struct evsel *evsel)
>> struct perf_env *evsel__env(struct evsel *evsel);
>>
>> int evsel__store_ids(struct evsel *evsel, struct evlist *evlist);
>> +
>> #endif /* __PERF_EVSEL_H */
>> diff --git a/tools/perf/util/stat-display.c b/tools/perf/util/stat-display.c
>> index 583ae4f09c5d1..cce7a76d6473c 100644
>> --- a/tools/perf/util/stat-display.c
>> +++ b/tools/perf/util/stat-display.c
>> @@ -1045,7 +1045,9 @@ static void print_header(struct perf_stat_config *config,
>> if (!config->csv_output) {
>> fprintf(output, "\n");
>> fprintf(output, " Performance counter stats for ");
>> - if (_target->system_wide)
>> + if (_target->bpf_str)
>> + fprintf(output, "\'BPF program(s) %s", _target->bpf_str);
>> + else if (_target->system_wide)
>> fprintf(output, "\'system wide");
>> else if (_target->cpu_list)
>> fprintf(output, "\'CPU(s) %s", _target->cpu_list);
>> diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c
>> index 8ce1479c98f03..0b3957323f668 100644
>> --- a/tools/perf/util/stat.c
>> +++ b/tools/perf/util/stat.c
>> @@ -527,7 +527,7 @@ int create_perf_stat_counter(struct evsel *evsel,
>> if (leader->core.nr_members > 1)
>> attr->read_format |= PERF_FORMAT_ID|PERF_FORMAT_GROUP;
>>
>> - attr->inherit = !config->no_inherit;
>> + attr->inherit = !config->no_inherit && list_empty(&evsel->bpf_counter_list);
>>
>> /*
>> * Some events get initialized with sample_(period/type) set,
>> diff --git a/tools/perf/util/target.c b/tools/perf/util/target.c
>> index a3db13dea937c..0f383418e3df5 100644
>> --- a/tools/perf/util/target.c
>> +++ b/tools/perf/util/target.c
>> @@ -56,6 +56,34 @@ enum target_errno target__validate(struct target *target)
>> ret = TARGET_ERRNO__UID_OVERRIDE_SYSTEM;
>> }
>>
>> + /* BPF and CPU are mutually exclusive */
>> + if (target->bpf_str && target->cpu_list) {
>> + target->cpu_list = NULL;
>> + if (ret == TARGET_ERRNO__SUCCESS)
>> + ret = TARGET_ERRNO__BPF_OVERRIDE_CPU;
>> + }
>> +
>> + /* BPF and PID/TID are mutually exclusive */
>> + if (target->bpf_str && target->tid) {
>> + target->tid = NULL;
>> + if (ret == TARGET_ERRNO__SUCCESS)
>> + ret = TARGET_ERRNO__BPF_OVERRIDE_PID;
>> + }
>> +
>> + /* BPF and UID are mutually exclusive */
>> + if (target->bpf_str && target->uid_str) {
>> + target->uid_str = NULL;
>> + if (ret == TARGET_ERRNO__SUCCESS)
>> + ret = TARGET_ERRNO__BPF_OVERRIDE_UID;
>> + }
>> +
>> + /* BPF and THREADS are mutually exclusive */
>> + if (target->bpf_str && target->per_thread) {
>> + target->per_thread = false;
>> + if (ret == TARGET_ERRNO__SUCCESS)
>> + ret = TARGET_ERRNO__BPF_OVERRIDE_THREAD;
>> + }
>> +
>> /* THREAD and SYSTEM/CPU are mutually exclusive */
>> if (target->per_thread && (target->system_wide || target->cpu_list)) {
>> target->per_thread = false;
>> @@ -109,6 +137,10 @@ static const char *target__error_str[] = {
>> "PID/TID switch overriding SYSTEM",
>> "UID switch overriding SYSTEM",
>> "SYSTEM/CPU switch overriding PER-THREAD",
>> + "BPF switch overriding CPU",
>> + "BPF switch overriding PID/TID",
>> + "BPF switch overriding UID",
>> + "BPF switch overriding THREAD",
>> "Invalid User: %s",
>> "Problems obtaining information for user %s",
>> };
>> @@ -134,7 +166,7 @@ int target__strerror(struct target *target, int errnum,
>>
>> switch (errnum) {
>> case TARGET_ERRNO__PID_OVERRIDE_CPU ...
>> - TARGET_ERRNO__SYSTEM_OVERRIDE_THREAD:
>> + TARGET_ERRNO__BPF_OVERRIDE_THREAD:
>> snprintf(buf, buflen, "%s", msg);
>> break;
>>
>> diff --git a/tools/perf/util/target.h b/tools/perf/util/target.h
>> index 6ef01a83b24e9..f132c6c2eef81 100644
>> --- a/tools/perf/util/target.h
>> +++ b/tools/perf/util/target.h
>> @@ -10,6 +10,7 @@ struct target {
>> const char *tid;
>> const char *cpu_list;
>> const char *uid_str;
>> + const char *bpf_str;
>> uid_t uid;
>> bool system_wide;
>> bool uses_mmap;
>> @@ -36,6 +37,10 @@ enum target_errno {
>> TARGET_ERRNO__PID_OVERRIDE_SYSTEM,
>> TARGET_ERRNO__UID_OVERRIDE_SYSTEM,
>> TARGET_ERRNO__SYSTEM_OVERRIDE_THREAD,
>> + TARGET_ERRNO__BPF_OVERRIDE_CPU,
>> + TARGET_ERRNO__BPF_OVERRIDE_PID,
>> + TARGET_ERRNO__BPF_OVERRIDE_UID,
>> + TARGET_ERRNO__BPF_OVERRIDE_THREAD,
>>
>> /* for target__parse_uid() */
>> TARGET_ERRNO__INVALID_UID,
>> @@ -59,6 +64,11 @@ static inline bool target__has_cpu(struct target *target)
>> return target->system_wide || target->cpu_list;
>> }
>>
>> +static inline bool target__has_bpf(struct target *target)
>> +{
>> + return target->bpf_str;
>> +}
>> +
>> static inline bool target__none(struct target *target)
>> {
>> return !target__has_task(target) && !target__has_cpu(target);
>> --
>> 2.24.1
>>
>
> --
>
> - Arnaldo