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Message-ID: <CAP-5=fXn=5SXqHKxaSAxs3bwQifUTVQWnrQb5A6D=3CHygfHLg@mail.gmail.com>
Date:   Tue, 19 Sep 2023 08:40:16 -0700
From:   Ian Rogers <irogers@...gle.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Namhyung Kim <namhyung@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Nick Terrell <terrelln@...com>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>, Andrii Nakryiko <andrii@...nel.org>,
        Tiezhu Yang <yangtiezhu@...ngson.cn>,
        James Clark <james.clark@....com>,
        Kajol Jain <kjain@...ux.ibm.com>,
        Patrice Duroux <patrice.duroux@...il.com>,
        Athira Rajeev <atrajeev@...ux.vnet.ibm.com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        bpf@...r.kernel.org, llvm@...ts.linux.dev
Subject: Re: [PATCH v1 0/5] Enable BPF skeletons by default

On Tue, Sep 19, 2023 at 6:16 AM Arnaldo Carvalho de Melo
<acme@...nel.org> wrote:
>
> Em Mon, Sep 18, 2023 at 04:40:15PM -0700, Namhyung Kim escreveu:
> > On Thu, Sep 14, 2023 at 2:20 PM Ian Rogers <irogers@...gle.com> wrote:
> > >
> > > Enable BPF skeletons by default but warn don't fail if they can't be
> > > supported. This was the intended behavior for Linux 6.4 but it caused
> > > an issue captured in this thread:
> > > https://lore.kernel.org/lkml/20230503211801.897735-1-acme@kernel.org/
> > >
> > > This issue isn't repeated here as the previous issue related to
> > > generating vmlinux.h, which is no longer performed by default as a
> > > checked-in vmlinux.h is used instead.
> > >
> > > Unlike with those changes, the BUILD_BPF_SKEL is kept and setting it
> > > to 0 disables BPF skeletons. Also, rather than fail the build due to a
> > > missed dependency, dependencies are checked and BPF skeletons disabled
> > > if they aren't present.
> > >
> > > Some related commits:
> > > b7a2d774c9c5 perf build: Add ability to build with a generated vmlinux.h
> > > a887466562b4 perf bpf skels: Stop using vmlinux.h generated from BTF, use subset of used structs + CO-RE
> > > a2af0f6b8ef7 perf build: Add system include paths to BPF builds
> > > 5be6cecda080 perf bpf skels: Make vmlinux.h use bpf.h and perf_event.h in source directory
> > > 9a2d5178b9d5 Revert "perf build: Make BUILD_BPF_SKEL default, rename to NO_BPF_SKEL"
> > > a887466562b4 perf bpf skels: Stop using vmlinux.h generated from BTF, use subset of used structs + CO-RE
> > > 1d7966547e11 perf build: Add warning for when vmlinux.h generation fails
> > > a980755beb5a perf build: Make BUILD_BPF_SKEL default, rename to NO_BPF_SKEL
> > >
> > > Ian Rogers (5):
> > >   perf version: Add status of bpf skeletons
> > >   perf build: Default BUILD_BPF_SKEL, warn/disable for missing deps
> > >   perf test: Update build test for changed BPF skeleton defaults
> > >   perf test: Ensure EXTRA_TESTS is covered in build test
> > >   perf test: Detect off-cpu support from build options
> >
> > Tested-by: Namhyung Kim <namhyung@...nel.org>
>
> Is this verbose by default now? Maybe its something on my side, but I
> noticed a higher level of verbosity, can you check?

I don't see more verbosity. Logs below.

Thanks,
Ian

$ git fetch --all
$ git checkout -b ptn-clean ptn/perf-tools-next
$ b4 am 20230914211948.814999-1-irogers@...gle.com
$ git am ./20230914_irogers_enable_bpf_skeletons_by_default.mbx
$ make -C tools/perf O=/tmp/perf clean
make: Entering directory 'tools/perf'
 CLEAN   x86
 CLEAN   libapi
 CLEAN   libbpf
 CLEAN   libsubcmd
 CLEAN   libsymbol
 CLEAN   libperf
 CLEAN   fixdep
 CLEAN   feature-detect
 CLEAN   python
 CLEAN   bpf-skel
 CLEAN   coresight
 CLEAN   core-objs
 CLEAN   core-progs
 CLEAN   core-gen
 CLEAN   Documentation
make: Leaving directory 'tools/perf'
$ make -C tools/perf O=/tmp/perf
make: Entering directory 'tools/perf'
  BUILD:   Doing 'make -j8' parallel build
 HOSTCC  /tmp/perf/fixdep.o
 HOSTLD  /tmp/perf/fixdep-in.o
 LINK    /tmp/perf/fixdep
Warning: Kernel ABI header differences:
 diff -u tools/include/uapi/drm/drm.h include/uapi/drm/drm.h
 diff -u tools/include/uapi/linux/kvm.h include/uapi/linux/kvm.h
 diff -u tools/include/uapi/linux/mount.h include/uapi/linux/mount.h
 diff -u tools/arch/x86/include/asm/disabled-features.h
arch/x86/include/asm/disabled-features.h
 diff -u tools/arch/x86/include/asm/cpufeatures.h
arch/x86/include/asm/cpufeatures.h
 diff -u tools/arch/x86/include/asm/msr-index.h arch/x86/include/asm/msr-index.h
 diff -u tools/arch/x86/include/uapi/asm/prctl.h
arch/x86/include/uapi/asm/prctl.h
 diff -u tools/arch/arm64/include/uapi/asm/perf_regs.h
arch/arm64/include/uapi/asm/perf_regs.h
 diff -u tools/arch/s390/include/uapi/asm/kvm.h arch/s390/include/uapi/asm/kvm.h
 diff -u tools/include/uapi/asm-generic/unistd.h
include/uapi/asm-generic/unistd.h
 diff -u tools/perf/arch/x86/entry/syscalls/syscall_64.tbl
arch/x86/entry/syscalls/syscall_64.tbl
 diff -u tools/perf/arch/powerpc/entry/syscalls/syscall.tbl
arch/powerpc/kernel/syscalls/syscall.tbl
 diff -u tools/perf/arch/s390/entry/syscalls/syscall.tbl
arch/s390/kernel/syscalls/syscall.tbl
 diff -u tools/perf/arch/mips/entry/syscalls/syscall_n64.tbl
arch/mips/kernel/syscalls/syscall_n64.tbl
 diff -u tools/perf/util/hashmap.h tools/lib/bpf/hashmap.h
Makefile.config:607: No sys/sdt.h found, no SDT events are defined,
please install systemtap-sdt-devel or systemtap-sdt-dev
Makefile.config:1009: No libcap found, disables capability support,
please install libcap-devel/libcap-dev
Makefile.config:1022: No numa.h found, disables 'perf bench numa mem'
benchmark, please install numactl-devel/libnuma-devel/libnuma-dev
Makefile.config:1081: No libbabeltrace found, disables 'perf data' CTF
format support, please install
libbabeltrace-dev[el]/libbabeltrace-ctf-dev

Auto-detecting system features:
...                                   dwarf: [ on  ]
...                      dwarf_getlocations: [ on  ]
...                                   glibc: [ on  ]
...                                  libbfd: [ on  ]
...                          libbfd-buildid: [ on  ]
...                                  libcap: [ OFF ]
...                                  libelf: [ on  ]
...                                 libnuma: [ OFF ]
...                  numa_num_possible_cpus: [ OFF ]
...                                 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  ]

 GEN     /tmp/perf/common-cmds.h
 CC      /tmp/perf/jvmti/libjvmti.o
 CC      /tmp/perf/dlfilters/dlfilter-test-api-v0.o
 CC      /tmp/perf/dlfilters/dlfilter-test-api-v2.o
 CC      /tmp/perf/dlfilters/dlfilter-show-cycles.o
 CC      /tmp/perf/jvmti/jvmti_agent.o
 MKDIR   /tmp/perf/libapi/fd/
 INSTALL /tmp/perf/libapi/include/api/cpu.h
 CC      /tmp/perf/libapi/fd/array.o
 INSTALL /tmp/perf/libapi/include/api/debug.h
 INSTALL /tmp/perf/libapi/include/api/io.h
 PERF_VERSION = 6.6.rc1.gda192f0aaa30
 CC      /tmp/perf/jvmti/libstring.o
 CC      /tmp/perf/jvmti/libctype.o
 LD      /tmp/perf/libapi/fd/libapi-in.o
 MKDIR   /tmp/perf/libapi/fs/
 CC      /tmp/perf/libperf/core.o
 CC      /tmp/perf/libapi/fs/fs.o
 CC      /tmp/perf/libperf/cpumap.o
 CC      /tmp/perf/libsubcmd/exec-cmd.o
 CC      /tmp/perf/libperf/threadmap.o
 INSTALL /tmp/perf/libperf/include/perf/bpf_perf.h
 LD      /tmp/perf/jvmti/jvmti-in.o
 INSTALL /tmp/perf/libperf/include/perf/core.h
 INSTALL /tmp/perf/libapi/include/api/fd/array.h
 INSTALL /tmp/perf/libsubcmd/include/subcmd/exec-cmd.h
 INSTALL /tmp/perf/libapi/include/api/fs/fs.h
 INSTALL /tmp/perf/libsubcmd/include/subcmd/help.h
 INSTALL /tmp/perf/libsubcmd/include/subcmd/pager.h
 INSTALL /tmp/perf/libapi/include/api/fs/tracing_path.h
 CC      /tmp/perf/libperf/evsel.o
 CC      /tmp/perf/libperf/evlist.o
 INSTALL libapi_headers
 CC      /tmp/perf/libperf/mmap.o
 CC      /tmp/perf/libperf/zalloc.o
 CC      /tmp/perf/libsymbol/kallsyms.o
 CC      /tmp/perf/libperf/xyarray.o
 CC      /tmp/perf/libperf/lib.o
 CC      /tmp/perf/libsubcmd/help.o
 MKDIR   /tmp/perf/libapi/fs/
 CC      /tmp/perf/libapi/fs/tracing_path.o
 CC      /tmp/perf/libsubcmd/pager.o
 INSTALL /tmp/perf/libperf/include/perf/cpumap.h
 CC      /tmp/perf/libapi/cpu.o
 INSTALL /tmp/perf/libperf/include/perf/threadmap.h
 INSTALL /tmp/perf/libperf/include/perf/evlist.h
 INSTALL /tmp/perf/libperf/include/perf/evsel.h
 INSTALL /tmp/perf/libperf/include/perf/event.h
 INSTALL /tmp/perf/libperf/include/perf/mmap.h
 INSTALL /tmp/perf/libperf/include/internal/cpumap.h
 INSTALL /tmp/perf/libperf/include/internal/evlist.h
 INSTALL /tmp/perf/libperf/include/internal/evsel.h
 LD      /tmp/perf/libsymbol/libsymbol-in.o
 LD      /tmp/perf/libperf/libperf-in.o
 INSTALL /tmp/perf/libperf/include/internal/lib.h
 INSTALL /tmp/perf/libperf/include/internal/mmap.h
 INSTALL /tmp/perf/libsymbol/include/symbol/kallsyms.h
 INSTALL /tmp/perf/libsubcmd/include/subcmd/parse-options.h
 INSTALL /tmp/perf/libperf/include/internal/rc_check.h
 CC      /tmp/perf/libapi/fs/cgroup.o
 INSTALL /tmp/perf/libperf/include/internal/threadmap.h
 INSTALL /tmp/perf/libsubcmd/include/subcmd/run-command.h
 AR      /tmp/perf/libsymbol/libsymbol.a
 INSTALL /tmp/perf/libperf/include/internal/xyarray.h
 INSTALL libsymbol_headers
 INSTALL libsubcmd_headers
 LINK    /tmp/perf/libperf-jvmti.so
 AR      /tmp/perf/libperf/libperf.a
 GEN     perf-archive
 GEN     perf-iostat
 LINK    /tmp/perf/dlfilters/dlfilter-test-api-v0.so
 CC      /tmp/perf/libsubcmd/parse-options.o
 LD      /tmp/perf/libapi/fs/libapi-in.o
 GEN     /tmp/perf/libbpf/bpf_helper_defs.h
 CC      /tmp/perf/libapi/debug.o
 LINK    /tmp/perf/dlfilters/dlfilter-test-api-v2.so
 LINK    /tmp/perf/dlfilters/dlfilter-show-cycles.so
 INSTALL libperf_headers
 CC      /tmp/perf/libapi/str_error_r.o
 INSTALL /tmp/perf/libbpf/include/bpf/bpf.h
 INSTALL /tmp/perf/libbpf/include/bpf/libbpf.h
 CC      /tmp/perf/libsubcmd/run-command.o
 INSTALL /tmp/perf/libbpf/include/bpf/btf.h
 INSTALL /tmp/perf/libbpf/include/bpf/libbpf_common.h
 INSTALL /tmp/perf/libbpf/include/bpf/libbpf_legacy.h
 INSTALL /tmp/perf/libbpf/include/bpf/bpf_helpers.h
 INSTALL /tmp/perf/libbpf/include/bpf/bpf_tracing.h
 INSTALL /tmp/perf/libbpf/include/bpf/bpf_endian.h
 INSTALL /tmp/perf/libbpf/include/bpf/bpf_core_read.h
 INSTALL /tmp/perf/libbpf/include/bpf/skel_internal.h
 INSTALL /tmp/perf/libbpf/include/bpf/libbpf_version.h
 LD      /tmp/perf/libapi/libapi-in.o
 INSTALL /tmp/perf/libbpf/include/bpf/bpf_helper_defs.h
 CC      /tmp/perf/libsubcmd/sigchain.o
 MKDIR   /tmp/perf/libbpf/staticobjs/
 CC      /tmp/perf/libbpf/staticobjs/libbpf.o
 AR      /tmp/perf/libapi/libapi.a
 CC      /tmp/perf/libsubcmd/subcmd-config.o
 INSTALL /tmp/perf/libbpf/include/bpf/usdt.bpf.h
 INSTALL libbpf_headers
 MKDIR   /tmp/perf/libbpf/staticobjs/
 CC      /tmp/perf/libbpf/staticobjs/bpf.o
 CC      /tmp/perf/libbpf/staticobjs/nlattr.o
 CC      /tmp/perf/libbpf/staticobjs/btf.o
 CC      /tmp/perf/libbpf/staticobjs/libbpf_errno.o
 CC      /tmp/perf/libbpf/staticobjs/str_error.o
 CC      /tmp/perf/libbpf/staticobjs/netlink.o
 CC      /tmp/perf/libbpf/staticobjs/bpf_prog_linfo.o
 CC      /tmp/perf/libbpf/staticobjs/libbpf_probes.o
 CC      /tmp/perf/libbpf/staticobjs/hashmap.o
 LD      /tmp/perf/libsubcmd/libsubcmd-in.o
 AR      /tmp/perf/libsubcmd/libsubcmd.a
 CC      /tmp/perf/libbpf/staticobjs/btf_dump.o
 CC      /tmp/perf/libbpf/staticobjs/ringbuf.o
 GEN     /tmp/perf/python/perf.cpython-311-x86_64-linux-gnu.so
 CC      /tmp/perf/libbpf/staticobjs/strset.o
 CC      /tmp/perf/libbpf/staticobjs/linker.o
 CC      /tmp/perf/libbpf/staticobjs/gen_loader.o
 CC      /tmp/perf/libbpf/staticobjs/relo_core.o

Auto-detecting system features:
...                         clang-bpf-co-re: [ on  ]
...                                    llvm: [ OFF ]
...                                  libcap: [ OFF ]
...                                  libbfd: [ on  ]

 MKDIR   /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/include/bpf
 MKDIR   /tmp/perf/util/bpf_skel/.tmp/bootstrap/
 MKDIR   /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/
 INSTALL /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/include/bpf/hashmap.h
 INSTALL /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/include/bpf/relo_core.h
 INSTALL /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/include/bpf/libbpf_internal.h
 GEN     /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/bpf_helper_defs.h
 INSTALL /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/include/bpf/bpf.h
 INSTALL /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/include/bpf/libbpf.h
 INSTALL /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/include/bpf/btf.h
 INSTALL /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/include/bpf/libbpf_common.h
 INSTALL /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/include/bpf/libbpf_legacy.h
 INSTALL /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/include/bpf/bpf_helpers.h
 INSTALL /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/include/bpf/bpf_tracing.h
 INSTALL /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/include/bpf/bpf_endian.h
 INSTALL /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/include/bpf/bpf_core_read.h
 INSTALL /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/include/bpf/skel_internal.h
 INSTALL /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/include/bpf/libbpf_version.h
 INSTALL /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/include/bpf/usdt.bpf.h
 INSTALL /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/include/bpf/bpf_helper_defs.h
 MKDIR   /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/staticobjs/
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/staticobjs/libbpf.o
 CC      /tmp/perf/libbpf/staticobjs/usdt.o
 CC      /tmp/perf/libbpf/staticobjs/zip.o
 CC      /tmp/perf/libbpf/staticobjs/elf.o
 MKDIR   /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/staticobjs/
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/staticobjs/bpf.o
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/staticobjs/nlattr.o
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/staticobjs/btf.o
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/staticobjs/libbpf_errno.o
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/staticobjs/str_error.o
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/staticobjs/netlink.o
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/staticobjs/bpf_prog_linfo.o
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/staticobjs/libbpf_probes.o
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/staticobjs/hashmap.o
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/staticobjs/btf_dump.o
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/staticobjs/ringbuf.o
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/staticobjs/strset.o
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/staticobjs/linker.o
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/staticobjs/gen_loader.o
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/staticobjs/relo_core.o
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/staticobjs/usdt.o
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/staticobjs/zip.o
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/staticobjs/elf.o
 INSTALL libbpf_headers
 LD      /tmp/perf/libbpf/staticobjs/libbpf-in.o
 LINK    /tmp/perf/libbpf/libbpf.a
 LD      /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/staticobjs/libbpf-in.o
 LINK    /tmp/perf/util/bpf_skel/.tmp/bootstrap/libbpf/libbpf.a
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/main.o
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/common.o
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/json_writer.o
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/gen.o
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/btf.o
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/xlated_dumper.o
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/btf_dumper.o
 CC      /tmp/perf/util/bpf_skel/.tmp/bootstrap/disasm.o
 LINK    /tmp/perf/util/bpf_skel/.tmp/bootstrap/bpftool
 CLANG   /tmp/perf/util/bpf_skel/.tmp/bpf_prog_profiler.bpf.o
 CLANG   /tmp/perf/util/bpf_skel/.tmp/bperf_leader.bpf.o
 CLANG   /tmp/perf/util/bpf_skel/.tmp/bperf_follower.bpf.o
 CLANG   /tmp/perf/util/bpf_skel/.tmp/bperf_cgroup.bpf.o
 CLANG   /tmp/perf/util/bpf_skel/.tmp/func_latency.bpf.o
 CLANG   /tmp/perf/util/bpf_skel/.tmp/off_cpu.bpf.o
 CLANG   /tmp/perf/util/bpf_skel/.tmp/lock_contention.bpf.o
 CLANG   /tmp/perf/util/bpf_skel/.tmp/kwork_trace.bpf.o
 CLANG   /tmp/perf/util/bpf_skel/.tmp/sample_filter.bpf.o
 CLANG   /tmp/perf/util/bpf_skel/.tmp/kwork_top.bpf.o
 CLANG   /tmp/perf/util/bpf_skel/.tmp/bench_uprobe.bpf.o
 CLANG   /tmp/perf/util/bpf_skel/.tmp/augmented_raw_syscalls.bpf.o
 GENSKEL /tmp/perf/util/bpf_skel/bpf_prog_profiler.skel.h
 GENSKEL /tmp/perf/util/bpf_skel/bperf_leader.skel.h
 GENSKEL /tmp/perf/util/bpf_skel/bperf_follower.skel.h
 GENSKEL /tmp/perf/util/bpf_skel/bperf_cgroup.skel.h
 GENSKEL /tmp/perf/util/bpf_skel/func_latency.skel.h
 GENSKEL /tmp/perf/util/bpf_skel/off_cpu.skel.h
 GENSKEL /tmp/perf/util/bpf_skel/bench_uprobe.skel.h
 GENSKEL /tmp/perf/util/bpf_skel/lock_contention.skel.h
 GENSKEL /tmp/perf/util/bpf_skel/kwork_top.skel.h
 GENSKEL /tmp/perf/util/bpf_skel/sample_filter.skel.h
 GENSKEL /tmp/perf/util/bpf_skel/augmented_raw_syscalls.skel.h
 GENSKEL /tmp/perf/util/bpf_skel/kwork_trace.skel.h
 CC      /tmp/perf/builtin-bench.o
 CC      /tmp/perf/builtin-annotate.o
 CC      /tmp/perf/builtin-config.o
 CC      /tmp/perf/builtin-diff.o
 CC      /tmp/perf/builtin-evlist.o
 CC      /tmp/perf/builtin-ftrace.o
 TEST    /tmp/perf/pmu-events/metric_test.log
 GEN     /tmp/perf/pmu-events/pmu-events.c
 CC      /tmp/perf/builtin-help.o
 CC      /tmp/perf/builtin-buildid-list.o
 CC      /tmp/perf/builtin-buildid-cache.o
 CC      /tmp/perf/builtin-kallsyms.o
 CC      /tmp/perf/builtin-list.o
 CC      /tmp/perf/builtin-record.o
 CC      /tmp/perf/builtin-report.o
 CC      /tmp/perf/builtin-stat.o
 CC      /tmp/perf/builtin-top.o
 CC      /tmp/perf/builtin-script.o
 CC      /tmp/perf/builtin-kvm.o
 CC      /tmp/perf/builtin-inject.o
 CC      /tmp/perf/builtin-mem.o
 CC      /tmp/perf/builtin-data.o
 CC      /tmp/perf/builtin-version.o
 CC      /tmp/perf/builtin-c2c.o
 CC      /tmp/perf/builtin-daemon.o
 CC      /tmp/perf/builtin-kmem.o
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