Messages in this thread | ![/](/images/icornerl.gif) | | Date | Fri, 3 Dec 2021 10:28:00 -0300 | From | Arnaldo Carvalho de Melo <> | Subject | Re: Building perf with BUILD_BPF_SKEL=1 by default |
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Em Fri, Dec 03, 2021 at 10:10:42AM -0300, Arnaldo Carvalho de Melo escreveu: > Hi Song, > > So I'm changing all my containers to build with BUILD_BPF_SKEL=1 > to then make this the default, so far older containers fail either > because the clang available is too old, so I've added a NO_BUILD_BPF_SKEL=1 > env var to disable that in those containers and then there is this other > case where clang is recent enough but: > > util/bpf_skel/bperf_leader.bpf.c:13:20: error: use of undeclared identifier 'BPF_F_PRESERVE_ELEMS' > __uint(map_flags, BPF_F_PRESERVE_ELEMS); > > Because the system's /usr/include/linux/bpf.h doesn't have that > BPF_F_PRESERVE_ELEMS enum entry. > > These are enums to make them available via BTF, but then I can't use > the: > > #ifdef BPF_F_PRESERVE_ELEMS > #define BPF_F_PRESERVE_ELEMS (1U << 11) > #endif > > approach. > > But then we _have_ it in the tools/include/uapi/linux/bpf.h we ship: > > $ grep BPF_F_PRESERVE_ELEMS tools/include/uapi/linux/bpf.h > BPF_F_PRESERVE_ELEMS = (1U << 11), > $ > > so we need to switch to using it somehow, this way we can build in more > systems and make bperf and other BPF enabled features. > > From a quick look I couldn't find where to add > $(sourcedir)/tools/include/uapi/ to the include path used to build > util/bpf_skel/bperf_leader.bpf.c, should be easy, can you take a look?
The failure for fedora:32, which seems to be on the threshold for clang to be considered recent enough for building skels fails differently:
clang version 10.0.1 (Fedora 10.0.1-3.fc32) Target: x86_64-unknown-linux-gnu Thread model: posix InstalledDir: /usr/bin Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-redhat-linux/10 Found candidate GCC installation: /usr/lib/gcc/x86_64-redhat-linux/10 Selected GCC installation: /usr/bin/../lib/gcc/x86_64-redhat-linux/10 Candidate multilib: .;@m64 Candidate multilib: 32;@m32 Selected multilib: .;@m64 + '[' '!' ']' + rm -rf /tmp/build/perf + mkdir /tmp/build/perf + make ARCH= CROSS_COMPILE= EXTRA_CFLAGS= BUILD_BPF_SKEL=1 -C tools/perf O=/tmp/build/perf make: Entering directory '/git/perf-5.16.0-rc3/tools/perf' BUILD: Doing 'make -j32' parallel build HOSTCC /tmp/build/perf/fixdep.o HOSTLD /tmp/build/perf/fixdep-in.o LINK /tmp/build/perf/fixdep /bin/sh: -c: line 0: syntax error near unexpected token `(' /bin/sh: -c: line 0: `expr bison (GNU Bison) 3.5 \>\= 371' Makefile.config:997: 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: [ 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 PERF_VERSION = 5.16.rc3.g0c338bcdfdb1 CC /tmp/build/perf/exec-cmd.o CC /tmp/build/perf/help.o CC /tmp/build/perf/cpu.o CC /tmp/build/perf/pager.o CC /tmp/build/perf/debug.o GEN perf-archive CC /tmp/build/perf/parse-options.o CC /tmp/build/perf/str_error_r.o GEN perf-with-kcore CC /tmp/build/perf/run-command.o CC /tmp/build/perf/sigchain.o GEN perf-iostat MKDIR /tmp/build/perf/fd/ MKDIR /tmp/build/perf/fs/ CC /tmp/build/perf/subcmd-config.o MKDIR /tmp/build/perf/jvmti/ MKDIR /tmp/build/perf/fs/ MKDIR /tmp/build/perf/jvmti/ CC /tmp/build/perf/dlfilters/dlfilter-test-api-v0.o CC /tmp/build/perf/dlfilters/dlfilter-show-cycles.o MKDIR /tmp/build/perf/jvmti/ CC /tmp/build/perf/fd/array.o MKDIR /tmp/build/perf/fs/ CC /tmp/build/perf/fs/fs.o MKDIR /tmp/build/perf/jvmti/ MKDIR /tmp/build/perf/pmu-events/ CC /tmp/build/perf/event-parse.o MKDIR /tmp/build/perf/pmu-events/ CC /tmp/build/perf/jvmti/libjvmti.o CC /tmp/build/perf/jvmti/jvmti_agent.o CC /tmp/build/perf/fs/tracing_path.o CC /tmp/build/perf/jvmti/libstring.o CC /tmp/build/perf/fs/cgroup.o HOSTCC /tmp/build/perf/pmu-events/json.o CC /tmp/build/perf/jvmti/libctype.o CC /tmp/build/perf/core.o HOSTCC /tmp/build/perf/pmu-events/jsmn.o MKDIR /tmp/build/perf/pmu-events/ HOSTCC /tmp/build/perf/pmu-events/jevents.o CC /tmp/build/perf/cpumap.o CC /tmp/build/perf/plugin_jbd2.o CC /tmp/build/perf/plugin_hrtimer.o CC /tmp/build/perf/plugin_kmem.o CC /tmp/build/perf/threadmap.o CC /tmp/build/perf/plugin_kvm.o CC /tmp/build/perf/evsel.o CC /tmp/build/perf/plugin_mac80211.o LINK /tmp/build/perf/dlfilters/dlfilter-show-cycles.so CC /tmp/build/perf/plugin_sched_switch.o make[3]: *** No rule to make target 'kernelversion'. Stop. CC /tmp/build/perf/plugin_function.o LD /tmp/build/perf/fd/libapi-in.o CC /tmp/build/perf/event-plugin.o GEN /tmp/build/perf/libbpf/bpf_helper_defs.h CC /tmp/build/perf/plugin_futex.o CC /tmp/build/perf/plugin_xen.o CC /tmp/build/perf/plugin_scsi.o CC /tmp/build/perf/evlist.o INSTALL /tmp/build/perf/libbpf/include/bpf/bpf.h LD /tmp/build/perf/plugin_jbd2-in.o CC /tmp/build/perf/plugin_cfg80211.o INSTALL /tmp/build/perf/libbpf/include/bpf/libbpf.h LD /tmp/build/perf/plugin_hrtimer-in.o LD /tmp/build/perf/fs/libapi-in.o LD /tmp/build/perf/plugin_kmem-in.o CC /tmp/build/perf/plugin_tlb.o LINK /tmp/build/perf/dlfilters/dlfilter-test-api-v0.so CC /tmp/build/perf/mmap.o CC /tmp/build/perf/zalloc.o LINK /tmp/build/perf/plugin_jbd2.so LINK /tmp/build/perf/plugin_hrtimer.so INSTALL /tmp/build/perf/libbpf/include/bpf/btf.h CC /tmp/build/perf/xyarray.o CC /tmp/build/perf/trace-seq.o LD /tmp/build/perf/plugin_mac80211-in.o LD /tmp/build/perf/libapi-in.o LD /tmp/build/perf/plugin_kvm-in.o CC /tmp/build/perf/parse-filter.o CC /tmp/build/perf/parse-utils.o LD /tmp/build/perf/plugin_sched_switch-in.o CC /tmp/build/perf/kbuffer-parse.o CC /tmp/build/perf/tep_strerror.o HOSTLD /tmp/build/perf/pmu-events/jevents-in.o INSTALL /tmp/build/perf/libbpf/include/bpf/libbpf_common.h INSTALL /tmp/build/perf/libbpf/include/bpf/libbpf_legacy.h CC /tmp/build/perf/event-parse-api.o INSTALL /tmp/build/perf/libbpf/include/bpf/xsk.h INSTALL /tmp/build/perf/libbpf/include/bpf/bpf_helpers.h AR /tmp/build/perf/libapi.a LD /tmp/build/perf/plugin_function-in.o INSTALL /tmp/build/perf/libbpf/include/bpf/bpf_tracing.h LINK /tmp/build/perf/plugin_kmem.so LINK /tmp/build/perf/plugin_mac80211.so LINK /tmp/build/perf/plugin_kvm.so LD /tmp/build/perf/plugin_xen-in.o LINK /tmp/build/perf/plugin_sched_switch.so LD /tmp/build/perf/plugin_cfg80211-in.o CC /tmp/build/perf/lib.o INSTALL /tmp/build/perf/libbpf/include/bpf/bpf_endian.h LD /tmp/build/perf/plugin_futex-in.o LD /tmp/build/perf/plugin_scsi-in.o INSTALL /tmp/build/perf/libbpf/include/bpf/bpf_core_read.h LINK /tmp/build/perf/pmu-events/jevents LD /tmp/build/perf/plugin_tlb-in.o LINK /tmp/build/perf/plugin_function.so LINK /tmp/build/perf/plugin_xen.so INSTALL /tmp/build/perf/libbpf/include/bpf/skel_internal.h LINK /tmp/build/perf/plugin_cfg80211.so INSTALL /tmp/build/perf/libbpf/include/bpf/libbpf_version.h LINK /tmp/build/perf/plugin_futex.so INSTALL /tmp/build/perf/libbpf/include/bpf/bpf_helper_defs.h LINK /tmp/build/perf/plugin_scsi.so LD /tmp/build/perf/jvmti/jvmti-in.o LINK /tmp/build/perf/plugin_tlb.so MKDIR /tmp/build/perf/libbpf/staticobjs/ MKDIR /tmp/build/perf/libbpf/staticobjs/ MKDIR /tmp/build/perf/libbpf/staticobjs/ MKDIR /tmp/build/perf/libbpf/staticobjs/ MKDIR /tmp/build/perf/libbpf/staticobjs/ LD /tmp/build/perf/libsubcmd-in.o MKDIR /tmp/build/perf/libbpf/staticobjs/ MKDIR /tmp/build/perf/libbpf/staticobjs/ MKDIR /tmp/build/perf/libbpf/staticobjs/ MKDIR /tmp/build/perf/libbpf/staticobjs/ CC /tmp/build/perf/libbpf/staticobjs/xsk.o CC /tmp/build/perf/libbpf/staticobjs/libbpf.o LINK /tmp/build/perf/libperf-jvmti.so CC /tmp/build/perf/libbpf/staticobjs/bpf.o CC /tmp/build/perf/libbpf/staticobjs/nlattr.o CC /tmp/build/perf/libbpf/staticobjs/btf.o CC /tmp/build/perf/libbpf/staticobjs/libbpf_errno.o CC /tmp/build/perf/libbpf/staticobjs/hashmap.o CC /tmp/build/perf/libbpf/staticobjs/str_error.o CC /tmp/build/perf/libbpf/staticobjs/netlink.o CC /tmp/build/perf/libbpf/staticobjs/btf_dump.o CC /tmp/build/perf/libbpf/staticobjs/bpf_prog_linfo.o CC /tmp/build/perf/libbpf/staticobjs/libbpf_probes.o CC /tmp/build/perf/libbpf/staticobjs/ringbuf.o CC /tmp/build/perf/libbpf/staticobjs/strset.o GEN /tmp/build/perf/libtraceevent-dynamic-list CC /tmp/build/perf/libbpf/staticobjs/linker.o CC /tmp/build/perf/libbpf/staticobjs/gen_loader.o CC /tmp/build/perf/libbpf/staticobjs/relo_core.o AR /tmp/build/perf/libsubcmd.a LD /tmp/build/perf/libtraceevent-in.o GEN /tmp/build/perf/pmu-events/pmu-events.c LINK /tmp/build/perf/libtraceevent.a LD /tmp/build/perf/libperf-in.o AR /tmp/build/perf/libperf.a GEN /tmp/build/perf/python/perf.so CC /tmp/build/perf/pmu-events/pmu-events.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/libbpf//include/bpf MKDIR /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/ MKDIR /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/ INSTALL /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf//include/bpf/hashmap.h GEN /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/bpf_helper_defs.h INSTALL /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf//include/bpf/bpf.h INSTALL /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf//include/bpf/libbpf.h INSTALL /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf//include/bpf/btf.h INSTALL /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf//include/bpf/libbpf_common.h INSTALL /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf//include/bpf/libbpf_legacy.h INSTALL /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf//include/bpf/xsk.h INSTALL /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf//include/bpf/bpf_helpers.h INSTALL /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf//include/bpf/bpf_tracing.h INSTALL /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf//include/bpf/bpf_endian.h INSTALL /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf//include/bpf/bpf_core_read.h INSTALL /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf//include/bpf/skel_internal.h INSTALL /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf//include/bpf/libbpf_version.h INSTALL /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf//include/bpf/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/ 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/btf_dump.o 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 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/ringbuf.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/strset.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/linker.o CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/gen_loader.o CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/libbpf/staticobjs/relo_core.o LD /tmp/build/perf/pmu-events/pmu-events-in.o LD /tmp/build/perf/libbpf/staticobjs/libbpf-in.o LINK /tmp/build/perf/libbpf/libbpf.a 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 CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/common.o CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/main.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/xlated_dumper.o CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/btf.o CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/btf_dumper.o CC /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/disasm.o LINK /tmp/build/perf/util/bpf_skel/.tmp//bootstrap/bpftool GEN /tmp/build/perf/util/bpf_skel/vmlinux.h 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 CLANG /tmp/build/perf/util/bpf_skel/.tmp/bperf_cgroup.bpf.o GENSKEL /tmp/build/perf/util/bpf_skel/bpf_prog_profiler.skel.h GENSKEL /tmp/build/perf/util/bpf_skel/bperf_leader.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 libbpf: elf: skipping unrecognized data section(7) .eh_frame libbpf: elf: skipping relo section(12) .rel.eh_frame for section(7) .eh_frame libbpf: map 'prev_readings': unexpected def kind var. Error: failed to open BPF object file: Invalid argument make[2]: *** [Makefile.perf:1076: /tmp/build/perf/util/bpf_skel/bperf_leader.skel.h] Error 255 make[2]: *** Waiting for unfinished jobs.... make[1]: *** [Makefile.perf:240: sub-make] Error 2 make: *** [Makefile:70: all] Error 2 make: Leaving directory '/git/perf-5.16.0-rc3/tools/perf' + exit 1 [perfbuilder@five 32]$
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