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Message-Id: <20180605175030.32549-1-acme@kernel.org>
Date: Tue, 5 Jun 2018 14:49:44 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ingo Molnar <mingo@...nel.org>
Cc: Clark Williams <williams@...hat.com>, linux-kernel@...r.kernel.org,
linux-perf-users@...r.kernel.org,
Arnaldo Carvalho de Melo <acme@...hat.com>,
Adrian Hunter <adrian.hunter@...el.com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Alexey Budankov <alexey.budankov@...ux.intel.com>,
Andi Kleen <ak@...ux.intel.com>,
David Ahern <dsahern@...il.com>,
Heiko Carstens <heiko.carstens@...ibm.com>,
Hendrik Brueckner <brueckner@...ux.vnet.ibm.com>,
Jiri Olsa <jolsa@...hat.com>,
Krister Johansen <kjlx@...pleofstupid.com>,
Martin Schwidefsky <schwidefsky@...ibm.com>,
Masami Hiramatsu <mhiramat@...nel.org>,
Michael Ellerman <mpe@...erman.id.au>,
Namhyung Kim <namhyung@...nel.org>,
"Naveen N . Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
Peter Zijlstra <peterz@...radead.org>,
Ravi Bangoria <ravi.bangoria@...ux.ibm.com>,
Sandipan Das <sandipan@...ux.vnet.ibm.com>,
stable@...r.kernel.org, Stephane Eranian <eranian@...gle.com>,
Thomas Richter <tmricht@...ux.ibm.com>,
Wang Nan <wangnan0@...wei.com>
Subject: [GIT PULL 00/46] perf/core fixes and improvements
From: Arnaldo Carvalho de Melo <acme@...hat.com>
Hi Ingo,
Please consider pulling,
- Arnaldo
Test results at the end of this message, as usual.
The following changes since commit 7869e5889477e4e32e4024d665431b35e8b7b693:
Merge remote-tracking branch 'tip/perf/urgent' into perf/core (2018-06-04 10:28:20 -0300)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git tags/perf-core-for-mingo-4.18-20180605
for you to fetch changes up to 03ac4e71cd120d2c3411d106d00d266114575f74:
perf intel-pt: Fix "Unexpected indirect branch" error (2018-06-05 12:28:52 -0300)
----------------------------------------------------------------
perf/core improvements and fixes:
perf stat:
. Display user and system time for workload targets (Jiri Olsa)
perf record:
. Enable arbitrary event names thru name= modifier (Alexey Budankov)
PowerPC:
. Add a python script for hypervisor call statistics (Ravi Bangoria)
Intel PT: (Adrian Hunter)
. Fix sync_switch INTEL_PT_SS_NOT_TRACING
. Fix decoding to accept CBR between FUP and corresponding TIP
. Fix MTC timing after overflow
. Fix "Unexpected indirect branch" error
perf test:
. record+probe_libc_inet_pton:
. To get the symbol table for dynamic
shared objects on ubuntu we need to pass the -D/--dynamic command line
option, unlike with the fedora distros (Arnaldo Carvalho de Melo)
. code-reading:
. Fix perf_env setup for PTI entry trampolines (Adrian Hunter)
. kmod-path:
. Add tests for vdso32 and vdsox32 (Adrian Hunter)
. Use header file util/debug.h (Thomas Richter)
perf annotate:
. Make the various UI backends (stdio, TUI, gtk) use more consistently
structs with annotation options as specified by the user (Arnaldo Carvalho de Melo)
. Move annotation specific knobs from the symbol_conf global kitchen
sink to the annotation option structs (Arnaldo Carvalho de Melo)
Core:
. Fix misleading error for some unparsable events mentioning PMUs when
those are not involved in the problem (Jiri Olsa)
- Fix symbol and object code resolution for vdso32 and vdsox32 (Adrian Hunter)
. No need to check for null when passing pointers to foo__get() style
refcount grabbing helpers, just like in the kernel and with free(),
its safe to pass a NULL pointer to avoid having to check it before
each and every foo__get() call (Arnaldo Carvalho de Melo)
. Remove some dead code (quote.[ch]) (Arnaldo Carvalho de Melo)
. Remove some needless globals, making them local (Arnaldo Carvalho de Melo)
. Reduce usage of symbol_conf.use_callchain, using other means of
finding out if callchains are in use or available for specific events,
as we evolved this codebase to allow requesting callchains for just
a subset of the monitored events. In time it will help polish
recording and showing mixed sets accross the various tools:
perf record -e cycles/call-graph=fp/,cache-misses/call-graph=dwarf/,instructions
(Arnaldo Carvalho de Melo)
. Consider PTI entry trampolines in map__rip_2objdump() (Adrian Hunter)
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
----------------------------------------------------------------
Adrian Hunter (8):
perf tests kmod-path: Add tests for vdso32 and vdsox32
perf tools: Fix symbol and object code resolution for vdso32 and vdsox32
perf test code-reading: Fix perf_env setup for PTI entry trampolines
perf map: Consider PTI entry trampolines in rip_2objdump()
perf intel-pt: Fix sync_switch INTEL_PT_SS_NOT_TRACING
perf intel-pt: Fix decoding to accept CBR between FUP and corresponding TIP
perf intel-pt: Fix MTC timing after overflow
perf intel-pt: Fix "Unexpected indirect branch" error
Alexey Budankov (1):
perf record: Enable arbitrary event names thru name= modifier
Arnaldo Carvalho de Melo (33):
perf tools: Remove dead quote.[ch] code
perf probe: Use return of map__get() to make code more compact
perf cgroup: Make evlist__find_cgroup() more compact
perf tools: No need to check if the argument to __get() function is NULL
perf annotate: Pass perf_evsel instead of just evsel->idx
perf annotate: __symbol__acount_cycles doesn't need notes
perf annotate: Split allocation of annotated_source struct
perf annotate: Introduce constructor/destructor for annotated_source
perf annotate: Introduce annotated_source__alloc_histograms
perf annotate: __symbol__inc_addr_samples() needs just annotated_source
perf annotate: Introduce symbol__hists()
perf annotate: Introduce symbol__cycle_hists()
perf annotate: Stop using symbol_conf.nr_events global in symbol__hists()
perf annotate: Replace symbol__alloc_hists() with symbol__hists()
perf tools: Ditch the symbol_conf.nr_events global
perf annotate: Add comment about annotated_src->nr_histograms
perf annotate stdio: Use annotation_options consistently
perf srcline: Introduce map__srcline() to make code more compact
perf sort: Introduce addr_map_symbol__srcline() to make code more compact
perf srcline: Make hist_entry srcline helper consistent with map's
perf annotate: Pass annotation_options to symbol__annotate()
perf annotate: Adopt anotation options from symbol_conf
perf annotate: Move disassembler_style global to annotation_options
perf hists browser: Pass annotation_options from tool to browser
perf annotate: Move objdump_path to struct annotation_options
perf report: No need to have report_callchain_help as a global
perf evsel: Add has_callchain() helper to make code more compact/clear
perf script: Check if evsel has callchains before trying to use it
perf sched: Use sched->show_callchain where appropriate
perf hists: Do not allocate space for callchains for evsels without them
perf hists: Introduce hist_entry__has_callchain() method
perf hists: Check if a hist_entry has callchains before using them
perf test record+probe_libc_inet_pton: Ask 'nm' for dynamic symbols
Jiri Olsa (2):
perf stat: Display user and system time
perf tools: Fix pmu events parsing rule
Ravi Bangoria (1):
perf script powerpc: Python script for hypervisor call statistics
Thomas Richter (1):
perf test: Use header file util/debug.h
tools/perf/Documentation/perf-list.txt | 6 +-
tools/perf/Documentation/perf-record.txt | 3 +
tools/perf/Documentation/perf-stat.txt | 40 +++--
tools/perf/arch/common.c | 4 +-
tools/perf/arch/common.h | 4 +-
tools/perf/builtin-annotate.c | 36 ++--
tools/perf/builtin-c2c.c | 2 +-
tools/perf/builtin-kvm.c | 2 -
tools/perf/builtin-probe.c | 3 +-
tools/perf/builtin-report.c | 39 ++--
tools/perf/builtin-sched.c | 14 +-
tools/perf/builtin-script.c | 12 +-
tools/perf/builtin-stat.c | 28 ++-
tools/perf/builtin-top.c | 48 +++--
tools/perf/builtin-trace.c | 2 +-
tools/perf/perf.c | 1 -
.../perf/scripts/python/bin/powerpc-hcalls-record | 2 +
.../perf/scripts/python/bin/powerpc-hcalls-report | 2 +
tools/perf/scripts/python/powerpc-hcalls.py | 200 +++++++++++++++++++++
tools/perf/tests/code-reading.c | 1 +
tools/perf/tests/kmod-path.c | 16 ++
tools/perf/tests/parse-events.c | 4 +-
tools/perf/tests/python-use.c | 3 +-
.../tests/shell/record+probe_libc_inet_pton.sh | 2 +-
tools/perf/ui/browsers/annotate.c | 21 ++-
tools/perf/ui/browsers/hists.c | 43 +++--
tools/perf/ui/browsers/hists.h | 3 +
tools/perf/ui/gtk/annotate.c | 2 +-
tools/perf/ui/gtk/hists.c | 5 +-
tools/perf/ui/hist.c | 2 +-
tools/perf/ui/stdio/hist.c | 4 +-
tools/perf/util/Build | 1 -
tools/perf/util/annotate.c | 160 ++++++++++-------
tools/perf/util/annotate.h | 53 ++++--
tools/perf/util/cgroup.c | 9 +-
tools/perf/util/dso.c | 2 +
tools/perf/util/evsel.c | 4 +-
tools/perf/util/evsel.h | 5 +
tools/perf/util/header.c | 24 ++-
tools/perf/util/hist.c | 23 ++-
tools/perf/util/hist.h | 26 ++-
.../perf/util/intel-pt-decoder/intel-pt-decoder.c | 23 ++-
.../perf/util/intel-pt-decoder/intel-pt-decoder.h | 9 +
tools/perf/util/intel-pt.c | 5 +
tools/perf/util/map.c | 26 ++-
tools/perf/util/map.h | 1 +
tools/perf/util/parse-events.l | 18 +-
tools/perf/util/parse-events.y | 14 +-
tools/perf/util/probe-event.c | 3 +-
tools/perf/util/quote.c | 62 -------
tools/perf/util/quote.h | 31 ----
tools/perf/util/session.c | 2 +-
tools/perf/util/sort.c | 81 +++------
tools/perf/util/sort.h | 7 +-
tools/perf/util/symbol.c | 1 -
tools/perf/util/symbol.h | 3 -
tools/perf/util/top.h | 3 +-
57 files changed, 731 insertions(+), 419 deletions(-)
create mode 100644 tools/perf/scripts/python/bin/powerpc-hcalls-record
create mode 100644 tools/perf/scripts/python/bin/powerpc-hcalls-report
create mode 100644 tools/perf/scripts/python/powerpc-hcalls.py
delete mode 100644 tools/perf/util/quote.c
delete mode 100644 tools/perf/util/quote.h
Test results:
The first ones are container (docker) based builds of tools/perf with
and without libelf support. Where clang is available, it is also used
to build perf with/without libelf, and building with LIBCLANGLLVM=1
(built-in clang) with gcc and clang when clang and its devel libraries
are installed.
The objtool and samples/bpf/ builds are disabled now that I'm switching from
using the sources in a local volume to fetching them from a http server to
build it inside the container, to make it easier to build in a container cluster.
Those will come back later.
Several are cross builds, the ones with -x-ARCH and the android one, and those
may not have all the features built, due to lack of multi-arch devel packages,
available and being used so far on just a few, like
debian:experimental-x-{arm64,mipsel}.
The 'perf test' one will perform a variety of tests exercising
tools/perf/util/, tools/lib/{bpf,traceevent,etc}, as well as run perf commands
with a variety of command line event specifications to then intercept the
sys_perf_event syscall to check that the perf_event_attr fields are set up as
expected, among a variety of other unit tests.
Then there is the 'make -C tools/perf build-test' ones, that build tools/perf/
with a variety of feature sets, exercising the build with an incomplete set of
features as well as with a complete one. It is planned to have it run on each
of the containers mentioned above, using some container orchestration
infrastructure. Get in contact if interested in helping having this in place.
# dm
1 alpine:3.4 : Ok gcc (Alpine 5.3.0) 5.3.0
2 alpine:3.5 : Ok gcc (Alpine 6.2.1) 6.2.1 20160822
3 alpine:3.6 : Ok gcc (Alpine 6.3.0) 6.3.0
4 alpine:3.7 : Ok gcc (Alpine 6.4.0) 6.4.0
5 alpine:edge : Ok gcc (Alpine 6.4.0) 6.4.0
6 amazonlinux:1 : Ok gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-28)
7 amazonlinux:2 : Ok gcc (GCC) 7.3.1 20180303 (Red Hat 7.3.1-5)
8 android-ndk:r12b-arm : Ok arm-linux-androideabi-gcc (GCC) 4.9.x 20150123 (prerelease)
9 android-ndk:r15c-arm : Ok arm-linux-androideabi-gcc (GCC) 4.9.x 20150123 (prerelease)
10 centos:5 : Ok gcc (GCC) 4.1.2 20080704 (Red Hat 4.1.2-55)
11 centos:6 : Ok gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-18)
12 centos:7 : Ok gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-28)
13 debian:7 : Ok gcc (Debian 4.7.2-5) 4.7.2
14 debian:8 : Ok gcc (Debian 4.9.2-10+deb8u1) 4.9.2
15 debian:9 : Ok gcc (Debian 6.3.0-18+deb9u1) 6.3.0 20170516
16 debian:experimental : Ok gcc (Debian 7.3.0-19) 7.3.0
17 debian:experimental-x-arm64 : Ok aarch64-linux-gnu-gcc (Debian 7.3.0-19) 7.3.0
18 debian:experimental-x-mips : Ok mips-linux-gnu-gcc (Debian 7.3.0-19) 7.3.0
19 debian:experimental-x-mips64 : Ok mips64-linux-gnuabi64-gcc (Debian 7.3.0-18) 7.3.0
20 debian:experimental-x-mipsel : Ok mipsel-linux-gnu-gcc (Debian 7.3.0-19) 7.3.0
21 fedora:20 : Ok gcc (GCC) 4.8.3 20140911 (Red Hat 4.8.3-7)
22 fedora:21 : Ok gcc (GCC) 4.9.2 20150212 (Red Hat 4.9.2-6)
23 fedora:22 : Ok gcc (GCC) 5.3.1 20160406 (Red Hat 5.3.1-6)
24 fedora:23 : Ok gcc (GCC) 5.3.1 20160406 (Red Hat 5.3.1-6)
25 fedora:24 : Ok gcc (GCC) 6.3.1 20161221 (Red Hat 6.3.1-1)
26 fedora:24-x-ARC-uClibc : Ok arc-linux-gcc (ARCompact ISA Linux uClibc toolchain 2017.09-rc2) 7.1.1 20170710
27 fedora:25 : Ok gcc (GCC) 6.4.1 20170727 (Red Hat 6.4.1-1)
28 fedora:26 : Ok gcc (GCC) 7.3.1 20180130 (Red Hat 7.3.1-2)
29 fedora:27 : Ok gcc (GCC) 7.3.1 20180303 (Red Hat 7.3.1-5)
30 fedora:28 : Ok gcc (GCC) 8.1.1 20180502 (Red Hat 8.1.1-1)
31 fedora:rawhide : Ok gcc (GCC) 8.0.1 20180324 (Red Hat 8.0.1-0.20)
32 gentoo-stage3-amd64:latest : Ok gcc (Gentoo 6.4.0-r1 p1.3) 6.4.0
33 mageia:5 : Ok gcc (GCC) 4.9.2
34 mageia:6 : Ok gcc (Mageia 5.5.0-1.mga6) 5.5.0
35 opensuse:42.1 : Ok gcc (SUSE Linux) 4.8.5
36 opensuse:42.2 : Ok gcc (SUSE Linux) 4.8.5
37 opensuse:42.3 : Ok gcc (SUSE Linux) 4.8.5
38 opensuse:tumbleweed : Ok gcc (SUSE Linux) 7.3.1 20180323 [gcc-7-branch revision 258812]
39 oraclelinux:6 : Ok gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-18.0.7)
40 oraclelinux:7 : Ok gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-28.0.1)
41 ubuntu:12.04.5 : Ok gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3
42 ubuntu:14.04.4 : Ok gcc (Ubuntu 4.8.4-2ubuntu1~14.04.3) 4.8.4
43 ubuntu:14.04.4-x-linaro-arm64 : Ok aarch64-linux-gnu-gcc (Linaro GCC 5.5-2017.10) 5.5.0
44 ubuntu:16.04 : Ok gcc (Ubuntu 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
45 ubuntu:16.04-x-arm : Ok arm-linux-gnueabihf-gcc (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
46 ubuntu:16.04-x-arm64 : Ok aarch64-linux-gnu-gcc (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
47 ubuntu:16.04-x-powerpc : Ok powerpc-linux-gnu-gcc (Ubuntu 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
48 ubuntu:16.04-x-powerpc64 : Ok powerpc64-linux-gnu-gcc (Ubuntu/IBM 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
49 ubuntu:16.04-x-powerpc64el : Ok powerpc64le-linux-gnu-gcc (Ubuntu/IBM 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
50 ubuntu:16.04-x-s390 : Ok s390x-linux-gnu-gcc (Ubuntu 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
51 ubuntu:16.10 : Ok gcc (Ubuntu 6.2.0-5ubuntu12) 6.2.0 20161005
52 ubuntu:17.04 : Ok gcc (Ubuntu 6.3.0-12ubuntu2) 6.3.0 20170406
53 ubuntu:17.10 : Ok gcc (Ubuntu 7.2.0-8ubuntu3.2) 7.2.0
54 ubuntu:18.04 : Ok gcc (Ubuntu 7.3.0-16ubuntu3) 7.3.0
#
# perf version
perf version 4.17.rc7.g03ac4e
# git log -1 --oneline
03ac4e71cd12 (HEAD -> perf/core, seventh/perf/core) perf intel-pt: Fix "Unexpected indirect branch" error
# uname -a
Linux jouet 4.17.0-rc5 #21 SMP Mon May 14 15:35:35 -03 2018 x86_64 x86_64 x86_64 GNU/Linux
# perf test
1: vmlinux symtab matches kallsyms : Ok
2: Detect openat syscall event : Ok
3: Detect openat syscall event on all cpus : Ok
4: Read samples using the mmap interface : Ok
5: Test data source output : Ok
6: Parse event definition strings : Ok
7: Simple expression parser : Ok
8: PERF_RECORD_* events & perf_sample fields : Ok
9: Parse perf pmu format : Ok
10: DSO data read : Ok
11: DSO data cache : Ok
12: DSO data reopen : Ok
13: Roundtrip evsel->name : Ok
14: Parse sched tracepoints fields : Ok
15: syscalls:sys_enter_openat event fields : Ok
16: Setup struct perf_event_attr : Ok
17: Match and link multiple hists : Ok
18: 'import perf' in python : Ok
19: Breakpoint overflow signal handler : Ok
20: Breakpoint overflow sampling : Ok
21: Breakpoint accounting : Ok
22: Number of exit events of a simple workload : Ok
23: Software clock events period values : Ok
24: Object code reading : Ok
25: Sample parsing : Ok
26: Use a dummy software event to keep tracking : Ok
27: Parse with no sample_id_all bit set : Ok
28: Filter hist entries : Ok
29: Lookup mmap thread : Ok
30: Share thread mg : Ok
31: Sort output of hist entries : Ok
32: Cumulate child hist entries : Ok
33: Track with sched_switch : Ok
34: Filter fds with revents mask in a fdarray : Ok
35: Add fd to a fdarray, making it autogrow : Ok
36: kmod_path__parse : Ok
37: Thread map : Ok
38: LLVM search and compile :
38.1: Basic BPF llvm compile : Ok
38.2: kbuild searching : Ok
38.3: Compile source for BPF prologue generation : Ok
38.4: Compile source for BPF relocation : Ok
39: Session topology : Ok
40: BPF filter :
40.1: Basic BPF filtering : Ok
40.2: BPF pinning : Ok
40.3: BPF prologue generation : Ok
40.4: BPF relocation checker : Ok
41: Synthesize thread map : Ok
42: Remove thread map : Ok
43: Synthesize cpu map : Ok
44: Synthesize stat config : Ok
45: Synthesize stat : Ok
46: Synthesize stat round : Ok
47: Synthesize attr update : Ok
48: Event times : Ok
49: Read backward ring buffer : Ok
50: Print cpu map : Ok
51: Probe SDT events : Ok
52: is_printable_array : Ok
53: Print bitmap : Ok
54: perf hooks : Ok
55: builtin clang support : Skip (not compiled in)
56: unit_number__scnprintf : Ok
57: mem2node : Ok
58: x86 rdpmc : Ok
59: Convert perf time to TSC : Ok
60: DWARF unwind : Ok
61: x86 instruction decoder - new instructions : Ok
62: Use vfs_getname probe to get syscall args filenames : Ok
63: Check open filename arg using perf trace + vfs_getname: Ok
64: probe libc's inet_pton & backtrace it with ping : Ok
65: Add vfs_getname probe to get syscall args filenames : Ok
#
$ make -C tools/perf build-test
make: Entering directory '/home/acme/git/perf/tools/perf'
- tarpkg: ./tests/perf-targz-src-pkg .
make_minimal_O: make NO_LIBPERL=1 NO_LIBPYTHON=1 NO_NEWT=1 NO_GTK2=1 NO_DEMANGLE=1 NO_LIBELF=1 NO_LIBUNWIND=1 NO_BACKTRACE=1 NO_LIBNUMA=1 NO_LIBAUDIT=1 NO_LIBBIONIC=1 NO_LIBDW_DWARF_UNWIND=1 NO_AUXTRACE=1 NO_LIBBPF=1 NO_LIBCRYPTO=1 NO_SDT=1 NO_JVMTI=1
make_no_ui_O: make NO_NEWT=1 NO_SLANG=1 NO_GTK2=1
make_no_scripts_O: make NO_LIBPYTHON=1 NO_LIBPERL=1
make_no_libnuma_O: make NO_LIBNUMA=1
make_help_O: make help
make_pure_O: make
make_no_auxtrace_O: make NO_AUXTRACE=1
make_debug_O: make DEBUG=1
make_clean_all_O: make clean all
make_util_map_o_O: make util/map.o
make_no_libelf_O: make NO_LIBELF=1
make_no_libperl_O: make NO_LIBPERL=1
make_no_newt_O: make NO_NEWT=1
make_tags_O: make tags
make_no_libbionic_O: make NO_LIBBIONIC=1
make_install_prefix_O: make install prefix=/tmp/krava
make_no_libpython_O: make NO_LIBPYTHON=1
make_with_babeltrace_O: make LIBBABELTRACE=1
make_install_prefix_slash_O: make install prefix=/tmp/krava/
make_util_pmu_bison_o_O: make util/pmu-bison.o
make_doc_O: make doc
make_no_libaudit_O: make NO_LIBAUDIT=1
make_perf_o_O: make perf.o
make_install_O: make install
make_static_O: make LDFLAGS=-static
make_no_libunwind_O: make NO_LIBUNWIND=1
make_no_demangle_O: make NO_DEMANGLE=1
make_with_clangllvm_O: make LIBCLANGLLVM=1
make_install_bin_O: make install-bin
make_no_slang_O: make NO_SLANG=1
make_no_libdw_dwarf_unwind_O: make NO_LIBDW_DWARF_UNWIND=1
make_no_gtk2_O: make NO_GTK2=1
make_no_libbpf_O: make NO_LIBBPF=1
make_no_backtrace_O: make NO_BACKTRACE=1
OK
make: Leaving directory '/home/acme/git/perf/tools/perf'
$
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