linux.git/tools/perf/Makefile.config, branch v5.13

perf tools: Copy uapi/asm/perf_regs.h from the kernel for MIPS

2021-06-01T13:07:46+00:00

To allow the build to complete on older systems, where those files are
either not uptodate, lacking some recent additions or not present at
all.

And check if the copy drifts from the kernel.

This commit is similar with
commit 12f020338a2c ("tools: Copy uapi/asm/perf_regs.h from the kernel")

With this commit, we can avoid the following build error in any case:

tools/perf/arch/mips/include/perf_regs.h:7:10:
fatal error: asm/perf_regs.h: No such file or directory
 #include 
          ^~~~~~~~~~~~~~~~~
compilation terminated.

Signed-off-by: Tiezhu Yang 
Cc: Alexander Shishkin 
Cc: Jiri Olsa 
Cc: Mark Rutland 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Xuefeng Li 
Link: http://lore.kernel.org/lkml/1622548436-12472-1-git-send-email-yangtiezhu@loongson.cn
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Fix dynamic libbpf link

2021-05-10T12:01:00+00:00

Justin reported broken build with LIBBPF_DYNAMIC=1.

When linking libbpf dynamically we need to use perf's
hashmap object, because it's not exported in libbpf.so
(only in libbpf.a).

Following build is now passing:

  $ make LIBBPF_DYNAMIC=1
    BUILD:   Doing 'make -j8' parallel build
    ...
  $ ldd perf | grep libbpf
        libbpf.so.0 => /lib64/libbpf.so.0 (0x00007fa7630db000)

Fixes: eee19501926d ("perf tools: Grab a copy of libbpf's hashmap")
Reported-by: Justin M. Forbes 
Signed-off-by: Jiri Olsa 
Cc: Alexander Shishkin 
Cc: Ian Rogers 
Cc: Mark Rutland 
Cc: Michael Petlan 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Link: http://lore.kernel.org/lkml/20210508205020.617984-1-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf build: Defer printing detected features to the end of all feature checks

2021-04-29T14:22:33+00:00

We were doing it in tools/build/Makefile.feature, after running the
feature checks, but then in tools/perf/Makefile.config we can call more
feature checks when we notice that some feature check failed, like when
libbfd wasn't detected and we add libraries to the LDFLAGS of its
feature check to try again, etc.

Acked-by: Jiri Olsa 
Signed-off-by: Arnaldo Carvalho de Melo

perf build: Regenerate the FEATURE_DUMP file after extra feature checks

2021-04-29T13:31:00+00:00

Feature detection is done in tools/build/Makefile.feature, we may exit
there with some features not detected and then, in
tools/perf/Makefile.config try adding extra libraries to link and then
do extra feature checks to see if we now find the feature.

This is the case with the disassembler-four-args that checks if the
diassembler() function in libopcodes (binutils) has a signature with
one or with four arguments, as this is not ABI and they changed it at
some point.

This is not a problem when doing normal builds, for instance:

  $ make -C tools/perf O=/tmp/build/perf

As we don't use what is in FEATURE-DUMP at that point, but is a problem
if we pass FEATURE_DUMP=/previously-detected-features as we do in
'make -C tools/perf build-test' to reuse the feature detection in the
many build combinations we test there.

When that is done feature-disassembler-four-args will be set to 0, but
opensuse 15.1 has the four arguments function signature in
disassembler(). The build thus fails.

Fix it by rewriting the FEATURE-DUMP file at the end of
tools/perf/Makefile.config to register features we retested in that make
file.

Signed-off-by: Jiri Olsa 
Reported-by: Arnaldo Carvalho de Melo 
Tested-by: Arnaldo Carvalho de Melo 
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Enable libtraceevent dynamic linking

2021-04-29T13:31:00+00:00

Currently we support only static linking with kernel's libtraceevent
(tools/lib/traceevent). This patch adds libtraceevent package detection
and support to link perf with it dynamically.

  The libtraceevent package status is displayed with:
  $ make VF=1 LIBTRACEEVENT_DYNAMIC=1
  ...
  ...                 libtraceevent: [ on  ]

Default behavior remains the same (static linking).

Committer testing:

  $ make LIBTRACEEVENT_DYNAMIC=1 VF=1 O=/tmp/build/perf -C tools/perf install-bin |& grep traceevent
  Makefile.config:1090: *** Error: No libtraceevent devel library found, please install libtraceevent-devel.  Stop.
  $

Signed-off-by: Michael Petlan 
Tested-by: Arnaldo Carvalho de Melo 
Cc: Jiri Olsa 
LPU-Reference: 20210428092023.4009-1-mpetlan@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Generate mips syscalls_n64.c syscall table

2021-03-01T17:49:28+00:00

Grab a copy of arch/mips/kernel/syscalls/syscall_n64.tbl and use it to
generate tools/perf/arch/mips/include/generated/asm/syscalls_n64.c file,
this is similar with commit 1b700c997500 ("perf tools: Build syscall
table .c header from kernel's syscall_64.tbl")

Signed-off-by: Tiezhu Yang 
Cc: Alexander Shishkin 
Cc: Jiri Olsa 
Cc: Juxin Gao 
Cc: Mark Rutland 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Thomas Bogendoerfer 
Cc: Xuefeng Li 
Cc: linux-mips@vger.kernel.org
Link: http://lore.kernel.org/lkml/1612409724-3516-4-git-send-email-yangtiezhu@loongson.cn
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Support MIPS unwinding and dwarf-regs

2021-03-01T17:47:50+00:00

Map perf APIs (perf_reg_name/get_arch_regstr/unwind__arch_reg_id) with
MIPS specific registers.

[ayan@wavecomp.com: repick this patch for unwinding userstack backtrace
by perf and libunwind on MIPS based CPU.]

[yangtiezhu@loongson.cn: Add sample_reg_masks[] to fix build error,
silence some checkpatch errors and warnings, and also separate the
original patches into two parts (MIPS kernel and perf tools) to merge
easily.]

The original patches:

https://lore.kernel.org/patchwork/patch/1126521/
https://lore.kernel.org/patchwork/patch/1126520/

Committer notes:

Do it as __perf_reg_name() to cope with:

  067012974c8ae31a ("perf tools: Fix arm64 build error with gcc-11")

Signed-off-by: Tiezhu Yang 
Cc: Alexander Shishkin 
Cc: Archer Yan 
Cc: David Daney 
Cc: Jianlin Lv 
Cc: Jiri Olsa 
Cc: Juxin Gao 
Cc: Mark Rutland 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Ralf Baechle 
Cc: Xuefeng Li 
Cc: Thomas Bogendoerfer 
Cc: linux-mips@vger.kernel.org
Link: http://lore.kernel.org/lkml/1612409724-3516-3-git-send-email-yangtiezhu@loongson.cn
Signed-off-by: Archer Yan 
Signed-off-by: David Daney 
Signed-off-by: Ralf Baechle 
Signed-off-by: Arnaldo Carvalho de Melo

perf build: Support build BPF skeletons with perf

2021-01-15T18:49:07+00:00

BPF programs are useful in perf to profile BPF programs.

BPF skeleton is by far the easiest way to write BPF tools. Enable
building BPF skeletons in util/bpf_skel. A dummy bpf skeleton is added.
More bpf skeletons will be added for different use cases.

Signed-off-by: Song Liu 
Tested-by: Arnaldo Carvalho de Melo 
Acked-by: Jiri Olsa 
Acked-by: Namhyung Kim 
Cc: Alexander Shishkin 
Cc: Mark Rutland 
Cc: Peter Zijlstra 
Cc: kernel-team@fb.com
Link: http://lore.kernel.org/lkml/20201229214214.3413833-3-songliubraving@fb.com
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Remove LTO compiler options when building perl support

2020-11-03T11:24:54+00:00

To avoid breaking the build by mixing files compiled with things coming
from distro specific compiler options for perl with the rest of perf,
i.e. to avoid this:

  `.gnu.debuglto_.debug_macro' referenced in section `.gnu.debuglto_.debug_macro' of /tmp/build/perf/util/scripting-engines/perf-in.o: defined in discarded section `.gnu.debuglto_.debug_macro[wm4.stdcpredef.h.19.8dc41bed5d9037ff9622e015fb5f0ce3]' of /tmp/build/perf/util/scripting-engines/perf-in.o

Noticed on Fedora 33.

Signed-off-by: Justin M. Forbes 
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1593431
Cc: Jiri Olsa 
Link: https://src.fedoraproject.org/rpms/kernel-tools/c/589a32b62f0c12516ab7b34e3dd30d450145bfa4?branch=master
Signed-off-by: Arnaldo Carvalho de Melo

Merge tag 'perf-tools-for-v5.10-2020-10-15' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux

2020-10-17T18:47:46+00:00

Pull perf tools updates from Arnaldo Carvalho de Melo:

- cgroup improvements for 'perf stat', allowing for compact
specification of events and cgroups in the command line.

- Support per thread topdown metrics in 'perf stat'.

- Support sample-read topdown metric group in 'perf record'

- Show start of latency in addition to its start in 'perf sched
latency'.

- Add min, max to 'perf script' futex-contention output, in addition to
avg.

- Allow usage of 'perf_event_attr->exclusive' attribute via the new
':e' event modifier.

- Add 'snapshot' command to 'perf record --control', using it with
Intel PT.

- Support FIFO file names as alternative options to 'perf record
--control'.

- Introduce branch history "streams", to compare 'perf record' runs
with 'perf diff' based on branch records and report hot streams.

- Support PE executable symbol tables using libbfd, to profile, for
instance, wine binaries.

- Add filter support for option 'perf ftrace -F/--funcs'.

- Allow configuring the 'disassembler_style' 'perf annotate' knob via
'perf config'

- Update CascadelakeX and SkylakeX JSON vendor events files.

- Add support for parsing perchip/percore JSON vendor events.

- Add power9 hv_24x7 core level metric events.

- Add L2 prefetch, ITLB instruction fetch hits JSON events for AMD
zen1.

- Enable Family 19h users by matching Zen2 AMD vendor events.

- Use debuginfod in 'perf probe' when required debug files not found
locally.

- Display negative tid in non-sample events in 'perf script'.

- Make GTK2 support opt-in

- Add build test with GTK+

- Add missing -lzstd to the fast path feature detection

- Add scripts to auto generate 'mmap', 'mremap' string<->id tables for
use in 'perf trace'.

- Show python test script in verbose mode.

- Fix uncore metric expressions

- Msan uninitialized use fixes.

- Use condition variables in 'perf bench numa'

- Autodetect python3 binary in systems without python2.

- Support md5 build ids in addition to sha1.

- Add build id 'perf test' regression test.

- Fix printable strings in python3 scripts.

- Fix off by ones in 'perf trace' in arches using libaudit.

- Fix JSON event code for events referencing std arch events.

- Introduce 'perf test' shell script for Arm CoreSight testing.

- Add rdtsc() for Arm64 for used in the PERF_RECORD_TIME_CONV metadata
event and in 'perf test tsc'.

- 'perf c2c' improvements: Add "RMT Load Hit" metric, "Total Stores",
fixes and documentation update.

- Fix usage of reloc_sym in 'perf probe' when using both kallsyms and
debuginfo files.

- Do not print 'Metric Groups:' unnecessarily in 'perf list'

- Refcounting fixes in the event parsing code.

- Add expand cgroup event 'perf test' entry.

- Fix out of bounds CPU map access when handling armv8_pmu events in
'perf stat'.

- Add build-id injection 'perf bench' benchmark.

- Enter namespace when reading build-id in 'perf inject'.

- Do not load map/dso when injecting build-id speeding up the 'perf
inject' process.

- Add --buildid-all option to avoid processing all samples, just the
mmap metadata events.

- Add feature test to check if libbfd has buildid support

- Add 'perf test' entry for PE binary format support.

- Fix typos in power8 PMU vendor events JSON files.

- Hide libtraceevent non API functions.

* tag 'perf-tools-for-v5.10-2020-10-15' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux: (113 commits)
perf c2c: Update documentation for metrics reorganization
perf c2c: Add metrics "RMT Load Hit"
perf c2c: Correct LLC load hit metrics
perf c2c: Change header for LLC local hit
perf c2c: Use more explicit headers for HITM
perf c2c: Change header from "LLC Load Hitm" to "Load Hitm"
perf c2c: Organize metrics based on memory hierarchy
perf c2c: Display "Total Stores" as a standalone metrics
perf c2c: Display the total numbers continuously
perf bench: Use condition variables in numa.
perf jevents: Fix event code for events referencing std arch events
perf diff: Support hot streams comparison
perf streams: Report hot streams
perf streams: Calculate the sum of total streams hits
perf streams: Link stream pair
perf streams: Compare two streams
perf streams: Get the evsel_streams by evsel_idx
perf streams: Introduce branch history "streams"
perf intel-pt: Improve PT documentation slightly
perf tools: Add support for exclusive groups/events
...