Em Tue, Mar 23, 2021 at 09:25:52AM -0300, Arnaldo Carvalho de Melo escreveu: > Em Fri, Mar 19, 2021 at 03:41:57PM -0300, Arnaldo Carvalho de Melo escreveu: > > Em Thu, Mar 18, 2021 at 10:15:13PM +0100, Jiri Olsa escreveu: > > > On Tue, Mar 16, 2021 at 02:18:35PM -0700, Song Liu wrote: > > > > bperf is off by default. To enable it, pass --bpf-counters option to > > > > perf-stat. bperf uses a BPF hashmap to share information about BPF > > > > programs and maps used by bperf. This map is pinned to bpffs. The > > > > default > > > > path is /sys/fs/bpf/perf_attr_map. The user could change the path with > > > > option --bpf-attr-map. > > > > > > > > Signed-off-by: Song Liu <songliubrav...@fb.com> > > > > > > Reviewed-by: Jiri Olsa <jo...@redhat.com> > > > > After applying just this first patch in the series I'm getting this > > after a 'make -C tools/ clean', now I'm checking if I need some new > > clang, ideas? > > Works now with clang from fedora 33, I was using a locally built, older, > now I get this when trying as non-root, expected, but we need to improve > the wording.
Fails as root as well, investigating: [root@five ~]# ls -lad /sys/fs/bpf/ drwx-----T. 2 root root 0 Mar 23 06:03 /sys/fs/bpf/ [root@five ~]# strace -e bpf perf stat --bpf-counters sleep 1 bpf(BPF_MAP_CREATE, {map_type=BPF_MAP_TYPE_HASH, key_size=120, value_size=8, max_entries=16, map_flags=0, inner_map_fd=0, map_name="", map_ifindex=0, btf_fd=0, btf_key_type_id=0, btf_value_type_id=0, btf_vmlinux_value_type_id=0}, 120) = -1 EPERM (Operation not permitted) Failed to lock perf_event_attr map --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=13916, si_uid=0, si_status=SIGTERM, si_utime=0, si_stime=0} --- +++ exited with 255 +++ [root@five ~]# > [acme@five perf]$ perf stat --bpf-counters sleep 1 > Failed to lock perf_event_attr map > [acme@five perf]$ > > > - Arnaldo > > > > [acme@quaco perf]$ make O=/tmp/build/perf -C tools/perf BUILD_BPF_SKEL=1 > > PYTHON=python3 install-bin > > make: Entering directory '/home/acme/git/perf/tools/perf' > > BUILD: Doing 'make -j8' parallel build > > Warning: Kernel ABI header at 'tools/include/uapi/linux/kvm.h' differs from > > latest version at 'include/uapi/linux/kvm.h' > > diff -u tools/include/uapi/linux/kvm.h include/uapi/linux/kvm.h > > Warning: Kernel ABI header at > > 'tools/perf/arch/mips/entry/syscalls/syscall_n64.tbl' differs from latest > > version at 'arch/mips/kernel/syscalls/syscall_n64.tbl' > > diff -u tools/perf/arch/mips/entry/syscalls/syscall_n64.tbl > > arch/mips/kernel/syscalls/syscall_n64.tbl > > > > 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 ] > > > > GEN /tmp/build/perf/common-cmds.h > > CC /tmp/build/perf/exec-cmd.o > > MKDIR /tmp/build/perf/fd/ > > MKDIR /tmp/build/perf/fs/ > > CC /tmp/build/perf/fs/fs.o > > CC /tmp/build/perf/event-parse.o > > CC /tmp/build/perf/fd/array.o > > CC /tmp/build/perf/core.o > > GEN /tmp/build/perf/bpf_helper_defs.h > > CC /tmp/build/perf/event-plugin.o > > MKDIR /tmp/build/perf/staticobjs/ > > PERF_VERSION = 5.12.rc2.g3df07f57f205 > > CC /tmp/build/perf/staticobjs/libbpf.o > > CC /tmp/build/perf/cpu.o > > LD /tmp/build/perf/fd/libapi-in.o > > CC /tmp/build/perf/cpumap.o > > CC /tmp/build/perf/help.o > > MKDIR /tmp/build/perf/fs/ > > CC /tmp/build/perf/fs/tracing_path.o > > CC /tmp/build/perf/fs/cgroup.o > > CC /tmp/build/perf/trace-seq.o > > CC /tmp/build/perf/pager.o > > CC /tmp/build/perf/parse-options.o > > LD /tmp/build/perf/fs/libapi-in.o > > CC /tmp/build/perf/debug.o > > CC /tmp/build/perf/str_error_r.o > > CC /tmp/build/perf/run-command.o > > CC /tmp/build/perf/sigchain.o > > LD /tmp/build/perf/libapi-in.o > > AR /tmp/build/perf/libapi.a > > CC /tmp/build/perf/subcmd-config.o > > CC /tmp/build/perf/threadmap.o > > CC /tmp/build/perf/evsel.o > > CC /tmp/build/perf/parse-filter.o > > MKDIR /tmp/build/perf/staticobjs/ > > CC /tmp/build/perf/staticobjs/bpf.o > > CC /tmp/build/perf/evlist.o > > CC /tmp/build/perf/parse-utils.o > > CC /tmp/build/perf/kbuffer-parse.o > > CC /tmp/build/perf/tep_strerror.o > > CC /tmp/build/perf/mmap.o > > CC /tmp/build/perf/zalloc.o > > CC /tmp/build/perf/event-parse-api.o > > LD /tmp/build/perf/libsubcmd-in.o > > AR /tmp/build/perf/libsubcmd.a > > CC /tmp/build/perf/xyarray.o > > LD /tmp/build/perf/libtraceevent-in.o > > LINK /tmp/build/perf/libtraceevent.a > > CC /tmp/build/perf/staticobjs/nlattr.o > > CC /tmp/build/perf/staticobjs/btf.o > > CC /tmp/build/perf/lib.o > > CC /tmp/build/perf/staticobjs/libbpf_errno.o > > CC /tmp/build/perf/staticobjs/str_error.o > > CC /tmp/build/perf/staticobjs/netlink.o > > CC /tmp/build/perf/staticobjs/bpf_prog_linfo.o > > CC /tmp/build/perf/staticobjs/libbpf_probes.o > > LD /tmp/build/perf/libperf-in.o > > AR /tmp/build/perf/libperf.a > > MKDIR /tmp/build/perf/pmu-events/ > > HOSTCC /tmp/build/perf/pmu-events/json.o > > CC /tmp/build/perf/plugin_jbd2.o > > CC /tmp/build/perf/staticobjs/xsk.o > > MKDIR /tmp/build/perf/pmu-events/ > > HOSTCC /tmp/build/perf/pmu-events/jsmn.o > > CC /tmp/build/perf/staticobjs/hashmap.o > > LD /tmp/build/perf/plugin_jbd2-in.o > > CC /tmp/build/perf/staticobjs/btf_dump.o > > CC /tmp/build/perf/plugin_hrtimer.o > > HOSTCC /tmp/build/perf/pmu-events/jevents.o > > LD /tmp/build/perf/plugin_hrtimer-in.o > > CC /tmp/build/perf/plugin_kmem.o > > CC /tmp/build/perf/staticobjs/ringbuf.o > > LD /tmp/build/perf/plugin_kmem-in.o > > CC /tmp/build/perf/plugin_kvm.o > > HOSTLD /tmp/build/perf/pmu-events/jevents-in.o > > CC /tmp/build/perf/perf-read-vdso32 > > CC /tmp/build/perf/plugin_mac80211.o > > LD /tmp/build/perf/plugin_kvm-in.o > > CC /tmp/build/perf/plugin_sched_switch.o > > CC /tmp/build/perf/plugin_function.o > > MKDIR /tmp/build/perf/jvmti/ > > CC /tmp/build/perf/jvmti/libjvmti.o > > LD /tmp/build/perf/plugin_mac80211-in.o > > GEN perf-archive > > LD /tmp/build/perf/plugin_sched_switch-in.o > > CC /tmp/build/perf/plugin_futex.o > > CC /tmp/build/perf/plugin_xen.o > > CC /tmp/build/perf/plugin_scsi.o > > LD /tmp/build/perf/plugin_function-in.o > > CC /tmp/build/perf/plugin_cfg80211.o > > LD /tmp/build/perf/plugin_futex-in.o > > LD /tmp/build/perf/plugin_xen-in.o > > LINK /tmp/build/perf/plugin_jbd2.so > > LINK /tmp/build/perf/plugin_hrtimer.so > > CC /tmp/build/perf/plugin_tlb.o > > LINK /tmp/build/perf/plugin_kmem.so > > LINK /tmp/build/perf/plugin_kvm.so > > LD /tmp/build/perf/plugin_scsi-in.o > > LINK /tmp/build/perf/plugin_mac80211.so > > LINK /tmp/build/perf/plugin_sched_switch.so > > LINK /tmp/build/perf/plugin_function.so > > LINK /tmp/build/perf/plugin_futex.so > > LD /tmp/build/perf/plugin_cfg80211-in.o > > LINK /tmp/build/perf/plugin_xen.so > > LINK /tmp/build/perf/plugin_scsi.so > > LD /tmp/build/perf/plugin_tlb-in.o > > MKDIR /tmp/build/perf/jvmti/ > > LINK /tmp/build/perf/plugin_cfg80211.so > > CC /tmp/build/perf/jvmti/jvmti_agent.o > > LINK /tmp/build/perf/plugin_tlb.so > > GEN perf-with-kcore > > CC /tmp/build/perf/jvmti/libstring.o > > CFLAGS= make -C ../bpf/bpftool \ > > OUTPUT=/tmp/build/perf/util/bpf_skel/.tmp/ bootstrap > > CC /tmp/build/perf/jvmti/libctype.o > > GEN /tmp/build/perf/libtraceevent-dynamic-list > > LINK /tmp/build/perf/pmu-events/jevents > > DESCEND plugins > > GEN /tmp/build/perf/python/perf.so > > GEN /tmp/build/perf/pmu-events/pmu-events.c > > CC /tmp/build/perf/plugins/plugin_jbd2.o > > CC /tmp/build/perf/plugins/plugin_hrtimer.o > > LD /tmp/build/perf/plugins/plugin_jbd2-in.o > > LD /tmp/build/perf/plugins/plugin_hrtimer-in.o > > CC /tmp/build/perf/plugins/plugin_kmem.o > > CC /tmp/build/perf/plugins/plugin_kvm.o > > LD /tmp/build/perf/jvmti/jvmti-in.o > > LD /tmp/build/perf/plugins/plugin_kmem-in.o > > LINK /tmp/build/perf/libperf-jvmti.so > > CC /tmp/build/perf/plugins/plugin_mac80211.o > > CC /tmp/build/perf/plugins/plugin_sched_switch.o > > CC /tmp/build/perf/pmu-events/pmu-events.o > > LD /tmp/build/perf/plugins/plugin_kvm-in.o > > CC /tmp/build/perf/plugins/plugin_function.o > > LD /tmp/build/perf/plugins/plugin_mac80211-in.o > > CC /tmp/build/perf/plugins/plugin_futex.o > > LD /tmp/build/perf/plugins/plugin_sched_switch-in.o > > CC /tmp/build/perf/plugins/plugin_xen.o > > LD /tmp/build/perf/plugins/plugin_function-in.o > > CC /tmp/build/perf/plugins/plugin_scsi.o > > LD /tmp/build/perf/plugins/plugin_futex-in.o > > CC /tmp/build/perf/plugins/plugin_cfg80211.o > > LD /tmp/build/perf/plugins/plugin_xen-in.o > > CC /tmp/build/perf/plugins/plugin_tlb.o > > LD /tmp/build/perf/plugins/plugin_scsi-in.o > > LD /tmp/build/perf/plugins/plugin_cfg80211-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_kvm.so > > LINK /tmp/build/perf/plugins/plugin_mac80211.so > > LD /tmp/build/perf/plugins/plugin_tlb-in.o > > LINK /tmp/build/perf/plugins/plugin_function.so > > LINK /tmp/build/perf/plugins/plugin_sched_switch.so > > LINK /tmp/build/perf/plugins/plugin_futex.so > > LINK /tmp/build/perf/plugins/plugin_xen.so > > LINK /tmp/build/perf/plugins/plugin_scsi.so > > LINK /tmp/build/perf/plugins/plugin_cfg80211.so > > LINK /tmp/build/perf/plugins/plugin_tlb.so > > INSTALL trace_plugins > > 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 ] > > > > 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/json_writer.o > > CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/gen.o > > CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/btf.o > > 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/ > > CC > > /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/libbpf.o > > CC > > /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/bpf.o > > MKDIR /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/ > > CC > > /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/nlattr.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/libbpf_errno.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/netlink.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/libbpf_probes.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/hashmap.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/staticobjs/libbpf-in.o > > LINK /tmp/build/perf/libbpf.a > > CLANG /tmp/build/perf/util/bpf_skel/.tmp/bpf_prog_profiler.bpf.o > > CLANG /tmp/build/perf/util/bpf_skel/.tmp/bperf_leader.bpf.o > > CLANG /tmp/build/perf/util/bpf_skel/.tmp/bperf_follower.bpf.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 > > GEN-SKEL /tmp/build/perf/util/bpf_skel/bperf_leader.skel.h > > GEN-SKEL /tmp/build/perf/util/bpf_skel/bperf_follower.skel.h > > libbpf: map 'prev_readings': unexpected def kind var. > > Error: failed to open BPF object file: Invalid argument > > libbpf: map 'diff_readings': unexpected def kind var. > > Error: failed to open BPF object file: Invalid argument > > make[2]: *** [Makefile.perf:1029: > > /tmp/build/perf/util/bpf_skel/bperf_leader.skel.h] Error 255 > > make[2]: *** Waiting for unfinished jobs.... > > make[2]: *** [Makefile.perf:1029: > > /tmp/build/perf/util/bpf_skel/bperf_follower.skel.h] Error 255 > > make[1]: *** [Makefile.perf:236: sub-make] Error 2 > > make: *** [Makefile:110: install-bin] Error 2 > > make: Leaving directory '/home/acme/git/perf/tools/perf' > > [acme@quaco perf]$ clang -v > > clang version 11.0.0 (https://github.com/llvm/llvm-project > > 67420f1b0e9c673ee638f2680fa83f468019004f) > > Target: x86_64-unknown-linux-gnu > > Thread model: posix > > InstalledDir: /usr/local/bin > > Found candidate GCC installation: /usr/lib/gcc/x86_64-redhat-linux/10 > > Selected GCC installation: /usr/lib/gcc/x86_64-redhat-linux/10 > > Candidate multilib: .;@m64 > > Candidate multilib: 32;@m32 > > Selected multilib: .;@m64 > > [acme@quaco perf]$ > > -- > > - Arnaldo -- - Arnaldo