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2026-01-12perf test subcmd help: Add exclude disjoint subcmd namesIan Rogers1-0/+26
The test is based on an error/fix posted to linux-perf-users. Reported-by: Sri Jayaramappa <sjayaram@akamai.com> Reviewed-by: Sri Jayaramappa <sjayaram@akamai.com> Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Guilherme Amadio <amadio@gentoo.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Closes: https://lore.kernel.org/linux-perf-users/20251202213632.2873731-1-sjayaram@akamai.com/ Closes: https://urldefense.com/v3/__https://lore.kernel.org/linux-perf-users/20251202213632.2873731-1-sjayaram@akamai.com/__;!!GjvTz_vk!XehekKNUE4Ib_tvqIH6PMIIhly4X3BZ-Y40RC1HKMQ-6OdYEFvUPQhyWv_gk9vsRRN4_RcOLS2Bh0CQ$ Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2026-01-12perf stat display: Make %f precision consistentIan Rogers1-21/+5
Commit bc22de9bcdb22491 ("perf stat: Display time in precision based on std deviation") added multirun workload elapsed time. There was an effort to make the precision in the output most useful for the user, however, when gathering over runs it means the formatting varies. This change just makes the output format fixed. Before: ``` $ while :; do perf stat --null --repeat 3 sleep 0.1 2>&1 | grep elapsed; done 0.101140 +- 0.000149 seconds time elapsed ( +- 0.15% ) 0.1011396 +- 0.0000218 seconds time elapsed ( +- 0.02% ) 0.101331 +- 0.000124 seconds time elapsed ( +- 0.12% ) ^C $ while :; do perf stat --null --repeat 3 sleep 1 2>&1 | grep elapsed; done 1.001317 +- 0.000146 seconds time elapsed ( +- 0.01% ) 1.001377 +- 0.000172 seconds time elapsed ( +- 0.02% ) 1.00253 +- 0.00131 seconds time elapsed ( +- 0.13% ) ``` After: ``` $ while :; do perf stat --null --repeat 3 sleep 0.1 2>&1 | grep elapsed; done 0.101406408 +- 0.000064778 seconds time elapsed ( +- 0.06% ) 0.101367315 +- 0.000027253 seconds time elapsed ( +- 0.03% ) 0.101434164 +- 0.000084750 seconds time elapsed ( +- 0.08% ) ^C $ while :; do perf stat --null --repeat 3 sleep 1 2>&1 | grep elapsed; done 1.001525467 +- 0.000051703 seconds time elapsed ( +- 0.01% ) 1.001375093 +- 0.000116200 seconds time elapsed ( +- 0.01% ) 1.001141025 +- 0.000046361 seconds time elapsed ( +- 0.00% ) ``` Closes: https://lore.kernel.org/lkml/aTQRgAOpKyI53TEq@gmail.com/ Suggested-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Ian Rogers <irogers@google.com> Tested-by: Ingo Molnar <mingo@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Chun-Tse Shao <ctshao@google.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2026-01-12perf build: Raise minimum shellcheck version to 0.7.2Nicolas Schier1-3/+4
Raise the minimum shellcheck version for perf builds to 0.7.2, so that systems with shellcheck versions below 0.7.2 will automatically skip the shell script checking, even if NO_SHELLCHECK is unset. Since commit 241f21be7d0fdf3c ("perf test perftool_testsuite: Use absolute paths"), shellcheck versions before 0.7.2 break the perf build with several SC1090 [2] warnings due to its too strict dynamic source handling [1], e.g.: In tests/shell/base_probe/test_line_semantics.sh line 20: . "$DIR_PATH/../common/init.sh" ^---------------------------^ SC1090: Can't follow non-constant source. Use a directive to specify location. Fixes: 241f21be7d0fdf3c ("perf test perftool_testsuite: Use absolute paths") Signed-off-by: Nicolas Schier <n.schier@avm.de> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jakub Brnak <jbrnak@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Nicolas Schier <nsc@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Philipp Hahn <p.hahn@avm.de> Cc: Veronika Molnarova <vmolnaro@redhat.com> Link: https://github.com/koalaman/shellcheck/issues/1998 # [1] Link: https://www.shellcheck.net/wiki/SC1090 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2026-01-12perf test stat tests: Fix for virtualized machinesThomas Richter1-1/+1
On s390 'perf test's 'perf stat tests', subtest test_hybrid fails for z/VM systems. The root cause is this statement: $(perf stat -a -- sleep 0.1 2>&1 |\ grep -E "/cpu-cycles/[uH]*| cpu-cycles[:uH]* -c) The 'perf stat' output on a s390 z/VM system is # perf stat -a -- sleep 0.1 2>&1 Performance counter stats for 'system wide': 56 context-switches # 46.3 cs/sec cs_per_second 1,210.41 msec cpu-clock # 11.9 CPUs CPUs_utilized 12 cpu-migrations # 9.9 migrations/sec ... 81 page-faults # 66.9 faults/sec ... 0.100891009 seconds time elapsed The grep command does not match any single line and exits with error code 1. As the bash script is executed with 'set -e', it aborts with the first error code being non-zero. Fix this and use 'wc -l' to count matching lines instead of 'grep ... -c'. Output before: # perf test 102 102: perf stat tests : FAILED! # Output after: # perf test 102 102: perf stat tests : Ok # Fixes: bb6e7cb11d97ce19 ("perf tools: Add fallback for exclude_guest") Reviewed-by: Ian Rogers <irogers@google.com> Reviewed-by: James Clark <james.clark@linaro.org> Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Jan Polensky <japo@linux.ibm.com> Cc: linux-s390@vger.kernel.org Cc: Namhyung Kim <namhyung@kernel.org> Cc: Sumanth Korikkar <sumanthk@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2026-01-07perf data: Fix coding styleDerek Foreman2-9/+6
Adjust some oddly indented fprintf() calls. Signed-off-by: Derek Foreman <derek.foreman@collabora.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2026-01-07perf data: Allow filtering conversion by time rangeDerek Foreman5-0/+96
This adds a feature to allow restricting the range of converted samples with a range string like perf-script and perf-report --time. Committer testing: Put a probe on the ICMP receive path handling broadcast packets: # perf probe icmp_rcv:64 Added new event: probe:icmp_rcv_L64 (on icmp_rcv:64) You can now use it in all perf tools, such as: perf record -e probe:icmp_rcv_L64 -aR sleep 1 # perf record -e probe:icmp_rcv_L64 ping -c 10 -b 127.255.255.255 WARNING: pinging broadcast address PING 127.255.255.255 (127.255.255.255) 56(84) bytes of data. ^C --- 127.255.255.255 ping statistics --- 10 packets transmitted, 0 received, 100% packet loss, time 9217ms [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.034 MB perf.data (10 samples) ] # perf script ping 52785 [009] 5847.300394: probe:icmp_rcv_L64: (ffffffffaadb337e) ping 52785 [009] 5848.325018: probe:icmp_rcv_L64: (ffffffffaadb337e) ping 52785 [009] 5849.349007: probe:icmp_rcv_L64: (ffffffffaadb337e) ping 52785 [009] 5850.372979: probe:icmp_rcv_L64: (ffffffffaadb337e) ping 52785 [009] 5851.396988: probe:icmp_rcv_L64: (ffffffffaadb337e) ping 52785 [009] 5852.420954: probe:icmp_rcv_L64: (ffffffffaadb337e) ping 52785 [009] 5853.444934: probe:icmp_rcv_L64: (ffffffffaadb337e) ping 52785 [009] 5854.468926: probe:icmp_rcv_L64: (ffffffffaadb337e) ping 52785 [009] 5855.492914: probe:icmp_rcv_L64: (ffffffffaadb337e) ping 52785 [009] 5856.516883: probe:icmp_rcv_L64: (ffffffffaadb337e) # Now get some slices using perf script: # perf script --time 40% ping 52785 [009] 5847.300394: probe:icmp_rcv_L64: (ffffffffaadb337e) ping 52785 [009] 5848.325018: probe:icmp_rcv_L64: (ffffffffaadb337e) ping 52785 [009] 5849.349007: probe:icmp_rcv_L64: (ffffffffaadb337e) ping 52785 [009] 5850.372979: probe:icmp_rcv_L64: (ffffffffaadb337e) # perf script --time 40%-60% ping 52785 [009] 5851.396988: probe:icmp_rcv_L64: (ffffffffaadb337e) ping 52785 [009] 5852.420954: probe:icmp_rcv_L64: (ffffffffaadb337e) # And finally use this new feature: # perf data convert --to-json out.json --time 0%-10% [ perf data convert: Converted 'perf.data' into JSON data 'out.json' ] [ perf data convert: Converted and wrote 0.001 MB (1 samples) ] [ perf data convert: Skipped 9 samples ] # cat out.json { "linux-perf-json-version": 1, "headers": { "header-version": 1, "captured-on": "2026-01-06T22:26:40Z", "data-offset": 520, "data-size": 34648, "feat-offset": 35168, "hostname": "number", "os-release": "6.17.12-300.fc43.x86_64", "arch": "x86_64", "cpu-desc": "AMD Ryzen 9 9950X3D 16-Core Processor", "cpuid": "AuthenticAMD,26,68,0", "nrcpus-online": 32, "nrcpus-avail": 32, "perf-version": "6.19.rc4.gf4c270685d3d", "cmdline": [ "/home/acme/bin/perf" ] }, "samples": [ { "timestamp": 5847300394661, "pid": 52785, "tid": 52785, "cpu": 9, "comm": "ping", "callchain": [ { "ip": "0xffffffffaadb337f", "symbol": "icmp_rcv", "dso": "[kernel.kallsyms]" } ], "__probe_ip": "ffffffffaadb337e" } ] } # Signed-off-by: Derek Foreman <derek.foreman@collabora.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2026-01-07perf build: Skip nondistro build test if libbfd is oldJames Clark1-0/+5
Non distro builds now require a new version of libbfd, so skip the test if the library is too old. The grep test isn't a strong as the feature test in test-libbfd-threadsafe.c, but there seems to be precedent for feature testing this way here and it's good enough for the build-test rule. If the function exists but returns an error it will be picked up by the feature test when attempting the build. Signed-off-by: James Clark <james.clark@linaro.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Bill Wendling <morbo@google.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Justin Stitt <justinstitt@google.com> Cc: Leo Yan <leo.yan@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2026-01-07perf build: Feature test for libbfd thread safety APIJames Clark1-0/+5
The non-distro build requires libbfd 2.42 since commit b72b8132d8fd ("perf libbfd: Ensure libbfd is initialized prior to use"). Add a feature test so that it's obvious why the build fails if this criteria isn't met. Signed-off-by: James Clark <james.clark@linaro.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Bill Wendling <morbo@google.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Justin Stitt <justinstitt@google.com> Cc: Leo Yan <leo.yan@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2026-01-07perf build: Remove unused libbfd-buildid feature testJames Clark1-7/+0
HAVE_LIBBFD_BUILDID_SUPPORT isn't used in the codebase so remove the feature test that sets it. Signed-off-by: James Clark <james.clark@linaro.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Bill Wendling <morbo@google.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Justin Stitt <justinstitt@google.com> Cc: Leo Yan <leo.yan@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2026-01-07perf build: Do all non-distro feature checks in one goJames Clark1-20/+12
None of the if statements or variable assignments in the non-distro block actually affect the feature checks. Just do them all in one place so the flow isn't obscured. Signed-off-by: James Clark <james.clark@linaro.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Bill Wendling <morbo@google.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Justin Stitt <justinstitt@google.com> Cc: Leo Yan <leo.yan@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2026-01-07perf build: Remove ↵Roberto Sassu1-9/+3
FEATURE_CHECK_LDFLAGS-disassembler-{four-args,init-styled} setting As the building mechanism is now able to retry detection with different combinations of linking flags, setting FEATURE_CHECK_LDFLAGS-disassembler-four-args and FEATURE_CHECK_LDFLAGS-disassembler-init-styled is not necessary anymore, so remove it. James Clark notes: Use the same technique to find the set of bfd-related libraries to link as in: 3308ffc5016e6136 ("tools, build: Retry detection of bfd-related features") Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Andres Freund <andres@anarazel.de> Cc: Andrii Nakryiko <andrii@kernel.org> Cc: Bill Wendling <morbo@google.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Justin Stitt <justinstitt@google.com> Cc: KP Singh <kpsingh@kernel.org> Cc: Leo Yan <leo.yan@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Martin KaFai Lau <martin.lau@linux.dev> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Nick Terrell <terrelln@fb.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Quentin Monnet <qmo@kernel.org> Cc: Song Liu <song@kernel.org> Cc: Stanislav Fomichev <sdf@google.com> Signed-off-by: James Clark <james.clark@linaro.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2026-01-07perf test java symbol: Additional libperf-jvmti.so path checkIan Rogers1-0/+4
If perf is built into an output directory then so is libperf-jvmti.so. If `perf test` is run from that directory then PWD needn't also be that directory meaning libperf-jvmti.so won't be found and the test skipped. Add an additional check for libperf-jvmti.so in the same directory as the perf binary for this case, this avoids the test skipping. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Leo Yan <leo.yan@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2026-01-07perf test: Fix test case perf evlist tests for s390xThomas Richter1-2/+3
Perf test case 78: perf evlist tests fails on s390. The failure is causes by grouping events cycles and instructions because sampling does only support event cycles. Change the group to software events to fix this. Output before: # ./perf test 78 78: perf evlist tests : FAILED! # Output after: # ./perf test 78 78: perf evlist tests : Ok # Fixes: db452961de939225 ("perf tests evlist: Add basic evlist test") Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Tested-by: Ian Rogers <irogers@google.com> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Jan Polensky <japo@linux.ibm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Sumanth Korikkar <sumanthk@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2026-01-05perf symbol: Remove Rust symbol workaroundsGary Guo1-15/+4
Due to an off-by-one error introduced in commit 73bbb94466fd3f8b ("kallsyms: support "big" kernel symbols"), long symbols (which are currently only produced by Rust) can have their symbol type being wrongly parsed by kernel/kallsyms.c. This has been fixed in commit f3f9f42232dee596 ("kallsyms: Fix wrong "big" kernel symbol type read from procfs"), and these symbols are now reported correctly. Drop the workaround in perf symbol that filter out these symbol types. Specifically, '1' and 'l' can never be generated by nm -- 'u' does indicate GNU unique, however such symbols are only generated by G++ for C++ templates, and are never generated by LLVM (LLVM generates weak symbols in such cases instead). 'N' can appear if symbols exist inside debug sections, and 'n' may appear for symbols inside note sections, however these sections do not typically have symbol (and they're explicitly filtered out by kallsyms). Therefore, the previous occurrence of these symbols types must be due to the off-by-one error and can be safely removed. Signed-off-by: Gary Guo <gary@garyguo.net> Acked-by: Miguel Ojeda <ojeda@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alice Ryhl <aliceryhl@google.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Andreas Hindborg <a.hindborg@kernel.org> Cc: Benno Lossin <lossin@kernel.org> Cc: Bill Wendling <morbo@google.com> Cc: Björn Roy Baron <bjorn3_gh@protonmail.com> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Danilo Krummrich <dakr@kernel.org> Cc: Dmitriy Vyukov <dvyukov@google.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Justin Stitt <justinstitt@google.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephen Brennan <stephen.s.brennan@oracle.com> Cc: Trevor Gross <tmgross@umich.edu> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2026-01-05Merge remote-tracking branch 'torvalds/master' into perf-tools-nextArnaldo Carvalho de Melo22-13/+70
To pick up perf-tools fixes. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-12-24tools headers: Sync syscall table with kernel sourcesNamhyung Kim9-0/+9
To pick up changes from: b36d4b6aa88ef039 ("arch: hookup listns() system call") This should be used to beautify the syscall arguments and it addresses these tools/perf build warnings: Warning: Kernel ABI header differences: diff -u tools/include/uapi/asm-generic/unistd.h include/uapi/asm-generic/unistd.h diff -u tools/scripts/syscall.tbl scripts/syscall.tbl diff -u tools/perf/arch/x86/entry/syscalls/syscall_32.tbl arch/x86/entry/syscalls/syscall_32.tbl 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/arch/arm/entry/syscalls/syscall.tbl arch/arm/tools/syscall.tbl diff -u tools/perf/arch/sh/entry/syscalls/syscall.tbl arch/sh/kernel/syscalls/syscall.tbl diff -u tools/perf/arch/sparc/entry/syscalls/syscall.tbl arch/sparc/kernel/syscalls/syscall.tbl diff -u tools/perf/arch/xtensa/entry/syscalls/syscall.tbl arch/xtensa/kernel/syscalls/syscall.tbl Please see tools/include/uapi/README. Note that s390 syscall table is still out of sync as it switches to use the generic table. But I'd like to minimize the change in this commit. Cc: linux-arch@vger.kernel.org Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-24tools headers: Sync linux/socket.h with kernel sourcesNamhyung Kim1-3/+21
To pick up changes from: d73c167708739137 ("socket: Split out a getsockname helper for io_uring") 4677e78800bbde62 ("socket: Unify getsockname and getpeername implementation") bf33247a90d3e85d ("net: Add struct sockaddr_unsized for sockaddr of unknown length") This should be used to beautify socket syscall arguments and it addresses these tools/perf build warnings: Warning: Kernel ABI header differences: diff -u tools/perf/trace/beauty/include/linux/socket.h include/linux/socket.h Please see tools/include/uapi/README. Cc: netdev@vger.kernel.org Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-24tools headers: Sync UAPI sound/asound.h with kernel sourcesNamhyung Kim1-1/+1
To pick up changes from: 9a97857db0c5655b ("ALSA: uapi: Fix typo in asound.h comment") This should address these tools/perf build warnings: Warning: Kernel ABI header differences: diff -u tools/perf/trace/beauty/include/uapi/sound/asound.h include/uapi/sound/asound.h Please see tools/include/uapi/README. Cc: linux-sound@vger.kernel.org Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-24tools headers: Sync UAPI linux/mount.h with kernel sourcesNamhyung Kim1-1/+1
To pick up changes from: 78f0e33cd6c939a5 ("fs/namespace: correctly handle errors returned by grab_requested_mnt_ns") This should be used to beautify mount syscall arguments and it addresses these tools/perf build warnings: Warning: Kernel ABI header differences: diff -u tools/perf/trace/beauty/include/uapi/linux/mount.h include/uapi/linux/mount.h Please see tools/include/uapi/README. Cc: linux-fsdevel@vger.kernel.org Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-24tools headers: Sync UAPI linux/fs.h with kernel sourcesNamhyung Kim1-1/+2
To pick up changes from: b30ffcdc0c15a88f ("block: introduce BLKREPORTZONESV2 ioctl") 0d8627cc936de8ea ("blktrace: add definitions for blk_user_trace_setup2") This should be used to beautify ioctl syscall arguments and it addresses these tools/perf build warnings: Warning: Kernel ABI header differences: diff -u tools/perf/trace/beauty/include/uapi/linux/fs.h include/uapi/linux/fs.h Please see tools/include/uapi/README. Cc: linux-fsdevel@vger.kernel.org Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-24tools headers: Sync UAPI linux/fcntl.h with kernel sourcesNamhyung Kim1-0/+12
To pick up changes from: fe93446b5ebdaa89 ("vfs: use UAPI types for new struct delegation definition") 4be9e04ebf75a5c4 ("vfs: add needed headers for new struct delegation definition") 1602bad16d7df82f ("vfs: expose delegation support to userland") This should be used to beautify fcntl syscall arguments and it addresses these tools/perf build warnings: Warning: Kernel ABI header differences: diff -u tools/perf/trace/beauty/include/uapi/linux/fcntl.h include/uapi/linux/fcntl.h Please see tools/include/uapi/README. Cc: linux-fsdevel@vger.kernel.org Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-23perf arm-spe: Add NVIDIA Olympus to neoverse listBesar Wicaksono1-0/+1
Add NVIDIA Olympus MIDR to neoverse_spe range list. Signed-off-by: Besar Wicaksono <bwicaksono@nvidia.com> Reviewed-by: Leo Yan <leo.yan@arm.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-23perf tests top: Make the test exclusiveIan Rogers1-1/+1
With sufficient tests running the load causes the top test fails with: ``` 123: perf top tests : FAILED! --- start --- test child forked, pid 629856 Basic perf top test Basic perf top test [Failed: no sample percentage found] ---- end(-1) ---- ``` Mark the test exclusive to avoid flakes. Fixes: 75e961730b9e ("perf tests top: Add basic perf top coverage test") Signed-off-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-23perf tests kvm: Avoid leaving perf.data.guest file aroundIan Rogers1-1/+1
Ensure the perf.data output when checking permissions is written to /dev/null so that it isn't left in the directory the test is run. Fixes: b58261584d2f ("perf test kvm: Add some basic perf kvm test coverage") Signed-off-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-17perf symbol: Fix ENOENT case for filename__read_build_idIan Rogers4-5/+13
Some callers of filename__read_build_id assume the error value must be -1, fix by making them handle all < 0 values. If is_regular_file fails in filename__read_build_id then it could be the file is missing (ENOENT) and it would be wrong to return -EWOULDBLOCK in that case. Fix the logic so -EWOULDBLOCK is only reported if other errors with stat haven't occurred. Fixes: 834ebb5678d7 ("perf tools: Don't read build-ids from non-regular files") Signed-off-by: Ian Rogers <irogers@google.com> Reviewed-by: James Clark <james.clark@linaro.org> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-17perf tools: Disable BPF skeleton if no libopenssl foundNamhyung Kim1-0/+8
The libopenssl is required by bpftool which is needed to generate BPF skeleton. Disable it by setting BUILD_BPF_SKEL to 0 otherwise it'll see build errors like below: CC /build/util/bpf_skel/.tmp/bootstrap/sign.o sign.c:16:10: fatal error: openssl/opensslv.h: No such file or directory 16 | #include <openssl/opensslv.h> | ^~~~~~~~~~~~~~~~~~~~ compilation terminated. make[3]: *** [Makefile:256: /build/util/bpf_skel/.tmp/bootstrap/sign.o] Error 1 make[3]: *** Waiting for unfinished jobs.... make[2]: *** [Makefile.perf:1211: /build/util/bpf_skel/.tmp/bootstrap/bpftool] Error 2 make[1]: *** [Makefile.perf:287: sub-make] Error 2 make: *** [Makefile:76: all] Error 2 Now it'll skip the build with the following message: Makefile.config:729: Warning: Disabled BPF skeletons as libopenssl is required Closes: https://lore.kernel.org/r/aP7uq6eVieG8v_v4@google.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-17perf report: Update sort key state from -F optionNamhyung Kim1-46/+54
Factor out __sort_dimension__update() so that it can be called from -s and -F option parsing logics. Otherwise the following command cannot go into the annotation mode. $ perf report -F overhead,type,sym Warning: Annotation is only available for symbolic views, include "sym*" in --sort to use it. Reviewed-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-12-17perf report: Fix histogram entry collapsing for -F optionNamhyung Kim1-0/+3
Users can use -F/--fields option to set output fields and sort keys together. But it missed to set perf_hpp_list->need_collapse for sort entries that have se_collapse callbacks. So it ends up with having duplicated entries separately. For example, let's run this command first. $ perf mem record -t load -U -- perf test -w datasym This will record samples for memory access (load) to struct 'buf' and a loop condition ('sig_atomic_t') types. So the following two commands should have identical output. $ perf report -s type --stdio --percent-limit=1 -q 87.80% perf buf 12.17% perf sig_atomic_t But using -F option didn't collapse the entries based on types so the result looked like below: $ perf report -F overhead,type --stdio --percent-limit=1 -q 23.31% perf buf 22.84% perf buf 21.26% perf buf 20.39% perf buf 12.17% perf sig_atomic_t Reviewed-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-12-17perf report: Enable data-type profiling with -F option tooNamhyung Kim1-1/+2
It checked -s/--sort options only. As the sort keys can be setup using the -F/--fields option as well, it should enable data-type profiling with it too. The following two commands should have the same output. $ perf report -s type $ perf report -F overhead,type But there's another problem on this. I'll handle it in the next commit. Reviewed-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-12-17perf record: Split --data-mmap optionNamhyung Kim4-9/+25
Currently -d/--data option controls both PERF_SAMPLE_ADDR bit and perf_event_attr.mmap_data flag. Separate them using new --data-mmap option to support recording only one of them. For data-type profiling, data MMAP is unnecessary but it wastes a lot of space in the ring buffer and data file. Committer testing: On an idle system: root@x1:~# perf record -d -a sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 5.672 MB perf.data (1075 samples) ] root@x1:~# ls -la perf.data -rw-------. 1 root root 5982480 Dec 16 15:34 perf.data root@x1:~# perf evlist -v cpu_atom/cycles/P: type: 0 (PERF_TYPE_HARDWARE), size: 144, config: 0xa00000000 (cpu_atom/PERF_COUNT_HW_CPU_CYCLES/), { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|ADDR|CPU|PERIOD|IDENTIFIER|DATA_SRC, read_format: ID|LOST, disabled: 1, freq: 1, precise_ip: 3, sample_id_all: 1 cpu_core/cycles/P: type: 0 (PERF_TYPE_HARDWARE), size: 144, config: 0x400000000 (cpu_core/PERF_COUNT_HW_CPU_CYCLES/), { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|ADDR|CPU|PERIOD|IDENTIFIER|DATA_SRC, read_format: ID|LOST, disabled: 1, freq: 1, precise_ip: 3, sample_id_all: 1 dummy:u: type: 1 (PERF_TYPE_SOFTWARE), size: 144, config: 0x9 (PERF_COUNT_SW_DUMMY), { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|ADDR|CPU|IDENTIFIER|DATA_SRC, read_format: ID|LOST, exclude_kernel: 1, exclude_hv: 1, mmap: 1, comm: 1, task: 1, mmap_data: 1, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1, ksymbol: 1, bpf_event: 1, build_id: 1 root@x1:~# Now with just --data-mmap we will not save that much, as only DATA_SRC will not be enabled in sample_type: root@x1:~# perf record --data-mmap -a sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 5.576 MB perf.data (716 samples) ] root@x1:~# ls -la perf.data -rw-------. 1 root root 5880112 Dec 16 15:37 perf.data root@x1:~# perf evlist -v cpu_atom/cycles/P: type: 0 (PERF_TYPE_HARDWARE), size: 144, config: 0xa00000000 (cpu_atom/PERF_COUNT_HW_CPU_CYCLES/), { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|CPU|PERIOD|IDENTIFIER, read_format: ID|LOST, disabled: 1, freq: 1, precise_ip: 3, sample_id_all: 1 cpu_core/cycles/P: type: 0 (PERF_TYPE_HARDWARE), size: 144, config: 0x400000000 (cpu_core/PERF_COUNT_HW_CPU_CYCLES/), { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|CPU|PERIOD|IDENTIFIER, read_format: ID|LOST, disabled: 1, freq: 1, precise_ip: 3, sample_id_all: 1 dummy:u: type: 1 (PERF_TYPE_SOFTWARE), size: 144, config: 0x9 (PERF_COUNT_SW_DUMMY), { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|CPU|IDENTIFIER, read_format: ID|LOST, exclude_kernel: 1, exclude_hv: 1, mmap: 1, comm: 1, task: 1, mmap_data: 1, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1, ksymbol: 1, bpf_event: 1, build_id: 1 root@x1:~# To complete, just with DATA_SRC, no mmap_data: root@x1:~# perf record --sample-mem-info -a sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 1.407 MB perf.data (1311 samples) ] root@x1:~# ls -la perf.data -rw-------. 1 root root 1509224 Dec 16 15:40 perf.data root@x1:~# perf evlist -v cpu_atom/cycles/P: type: 0 (PERF_TYPE_HARDWARE), size: 144, config: 0xa00000000 (cpu_atom/PERF_COUNT_HW_CPU_CYCLES/), { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|CPU|PERIOD|IDENTIFIER|DATA_SRC, read_format: ID|LOST, disabled: 1, freq: 1, precise_ip: 3, sample_id_all: 1 cpu_core/cycles/P: type: 0 (PERF_TYPE_HARDWARE), size: 144, config: 0x400000000 (cpu_core/PERF_COUNT_HW_CPU_CYCLES/), { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|CPU|PERIOD|IDENTIFIER|DATA_SRC, read_format: ID|LOST, disabled: 1, freq: 1, precise_ip: 3, sample_id_all: 1 dummy:u: type: 1 (PERF_TYPE_SOFTWARE), size: 144, config: 0x9 (PERF_COUNT_SW_DUMMY), { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|CPU|IDENTIFIER|DATA_SRC, read_format: ID|LOST, exclude_kernel: 1, exclude_hv: 1, mmap: 1, comm: 1, task: 1, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1, ksymbol: 1, bpf_event: 1, build_id: 1 root@x1:~# Reviewed-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-12-17perf vendor power9 nest metrics: Correct unit from MB to MiBIan Rogers1-4/+4
6.1e-5 is very close to 1/16384, where 16384 is 2^14, i.e. a power of 2. When units are in powers of 2 the IEC unit is MiB (mebibytes) rather than MB (megabytes) where the values are powers of 10. This patch corrects the unit for uniformity and because such units may be pattern matched against. Reviewed-by: Madhavan Srinivasan <maddy@linux.ibm.com> Signed-off-by: Ian Rogers <irogers@google.com> Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com> Cc: Kajol Jain <kjain@linux.ibm.com> Link: https://lore.kernel.org/r/20251031162637.1456191-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-12-17perf trace: Don't change const char stringsArnaldo Carvalho de Melo1-4/+7
We got away with this so far but now with fedora 44 complaining about the return value of strchr et all, lets use strdup for good measure. Reviewed-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20251211221756.96294-5-acme@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-12-17perf tools: Use const for variables receiving str{str,r?chr}() returnsArnaldo Carvalho de Melo3-4/+5
Newer glibc versions return const char for str{str,chr}() where the haystack/s is const so to avoid warnings like these on fedora 44 change some variables to const: 36 8.17 fedora:44 : FAIL gcc version 15.2.1 20251111 (Red Hat 15.2.1-4) (GCC) libbpf.c: In function 'kallsyms_cb': libbpf.c:8489:13: error: assignment discards 'const' qualifier from pointer target type [-Werror=discarded-qualifiers] 8489 | res = strstr(sym_name, ".llvm."); Reviewed-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20251211221756.96294-4-acme@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-12-17perf diff: Constify strchr() return variablesArnaldo Carvalho de Melo1-7/+5
Newer glibc versions return const char for strchr() when the 's' arg is const, change the return variable to const to match that. Also we don't need to turn that ',' into a '\0', as strtol() will stop in the first invalid char. No need to touch read only memory. First noticed with fedora 44. Reviewed-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20251211221756.96294-3-acme@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-12-17perf list: Remove unused 'sep' variableArnaldo Carvalho de Melo1-2/+2
It is just being set to the return of strchr() but never used, just ditch it and with it get rid of a warning about it not being const on fedora 44. Reviewed-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20251211221756.96294-2-acme@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-12-07Merge tag 'perf-tools-for-v6.19-2025-12-06' of ↵Linus Torvalds237-3636/+11087
git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools Pull perf tools updates from Namhyung Kim: "Perf event/metric description: Unify all event and metric descriptions in JSON format. Now event parsing and handling is greatly simplified by that. From users point of view, perf list will provide richer information about hardware events like the following. $ perf list hw List of pre-defined events (to be used in -e or -M): legacy hardware: branch-instructions [Retired branch instructions [This event is an alias of branches]. Unit: cpu] branch-misses [Mispredicted branch instructions. Unit: cpu] branches [Retired branch instructions [This event is an alias of branch-instructions]. Unit: cpu] bus-cycles [Bus cycles,which can be different from total cycles. Unit: cpu] cache-misses [Cache misses. Usually this indicates Last Level Cache misses; this is intended to be used in conjunction with the PERF_COUNT_HW_CACHE_REFERENCES event to calculate cache miss rates. Unit: cpu] cache-references [Cache accesses. Usually this indicates Last Level Cache accesses but this may vary depending on your CPU. This may include prefetches and coherency messages; again this depends on the design of your CPU. Unit: cpu] cpu-cycles [Total cycles. Be wary of what happens during CPU frequency scaling [This event is an alias of cycles]. Unit: cpu] cycles [Total cycles. Be wary of what happens during CPU frequency scaling [This event is an alias of cpu-cycles]. Unit: cpu] instructions [Retired instructions. Be careful,these can be affected by various issues,most notably hardware interrupt counts. Unit: cpu] ref-cycles [Total cycles; not affected by CPU frequency scaling. Unit: cpu] But most notable changes would be in the perf stat. On the right side, the default metrics are better named and aligned. :) $ perf stat -- perf test -w noploop Performance counter stats for 'perf test -w noploop': 11 context-switches # 10.8 cs/sec cs_per_second 0 cpu-migrations # 0.0 migrations/sec migrations_per_second 3,612 page-faults # 3532.5 faults/sec page_faults_per_second 1,022.51 msec task-clock # 1.0 CPUs CPUs_utilized 110,466 branch-misses # 0.0 % branch_miss_rate (88.66%) 6,934,452,104 branches # 6781.8 M/sec branch_frequency (88.66%) 4,657,032,590 cpu-cycles # 4.6 GHz cycles_frequency (88.65%) 27,755,874,218 instructions # 6.0 instructions insn_per_cycle (89.03%) TopdownL1 # 0.3 % tma_backend_bound # 9.3 % tma_bad_speculation (89.05%) # 9.7 % tma_frontend_bound (77.86%) # 80.7 % tma_retiring (88.81%) 1.025318171 seconds time elapsed 1.013248000 seconds user 0.012014000 seconds sys Deferred unwinding support: With the kernel support (commit c69993ecdd4d: "perf: Support deferred user unwind"), perf can use deferred callchains for userspace stack trace with frame pointers like below: $ perf record --call-graph fp,defer ... This will be transparent to users when it comes to other commands like perf report and perf script. They will merge the deferred callchains to the previous samples as if they were collected together. ARM SPE updates - Extensive enhancements to support various kinds of memory operations including GCS, MTE allocation tags, memcpy/memset, register access, and SIMD operations. - Add inverted data source filter (inv_data_src_filter) support to exclude certain data sources. - Improve documentation. Vendor event updates: - Intel: Updated event files for Sierra Forest, Panther Lake, Meteor Lake, Lunar Lake, Granite Rapids, and others. - Arm64: Added metrics for i.MX94 DDR PMU and Cortex-A720AE definitions. - RISC-V: Added JSON support for T-HEAD C920V2. Misc: - Improve pointer tracking in data type profiling. It'd give better output when the variable is using container_of() to convert type. - Annotation support for perf c2c report in TUI. Press 'a' key to enter annotation view from cacheline browser window. This will show which instruction is causing the cacheline contention. - Lots of fixes and test coverage improvements!" * tag 'perf-tools-for-v6.19-2025-12-06' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools: (214 commits) libperf: Use 'extern' in LIBPERF_API visibility macro perf stat: Improve handling of termination by signal perf tests stat: Add test for error for an offline CPU perf stat: When no events, don't report an error if there is none perf tests stat: Add "--null" coverage perf cpumap: Add "any" CPU handling to cpu_map__snprint_mask libperf cpumap: Fix perf_cpu_map__max for an empty/NULL map perf stat: Allow no events to open if this is a "--null" run perf test kvm: Add some basic perf kvm test coverage perf tests evlist: Add basic evlist test perf tests script dlfilter: Add a dlfilter test perf tests kallsyms: Add basic kallsyms test perf tests timechart: Add a perf timechart test perf tests top: Add basic perf top coverage test perf tests buildid: Add purge and remove testing perf tests c2c: Add a basic c2c perf c2c: Clean up some defensive gets and make asan clean perf jitdump: Fix missed dso__put perf mem-events: Don't leak online CPU map perf hist: In init, ensure mem_info is put on error paths ...
2025-12-05perf stat: Improve handling of termination by signalIan Rogers1-5/+16
When interrupting perf stat in repeat mode with a signal the signal is passed to the child process but the repeat doesn't terminate: ``` $ perf stat -v --null --repeat 10 sleep 1 Control descriptor is not initialized [ perf stat: executing run #1 ... ] [ perf stat: executing run #2 ... ] ^Csleep: Interrupt [ perf stat: executing run #3 ... ] [ perf stat: executing run #4 ... ] [ perf stat: executing run #5 ... ] [ perf stat: executing run #6 ... ] [ perf stat: executing run #7 ... ] [ perf stat: executing run #8 ... ] [ perf stat: executing run #9 ... ] [ perf stat: executing run #10 ... ] Performance counter stats for 'sleep 1' (10 runs): 0.9500 +- 0.0512 seconds time elapsed ( +- 5.39% ) 0.01user 0.02system 0:09.53elapsed 0%CPU (0avgtext+0avgdata 18940maxresident)k 29944inputs+0outputs (0major+2629minor)pagefaults 0swaps ``` Terminate the repeated run and give a reasonable exit value: ``` $ perf stat -v --null --repeat 10 sleep 1 Control descriptor is not initialized [ perf stat: executing run #1 ... ] [ perf stat: executing run #2 ... ] [ perf stat: executing run #3 ... ] ^Csleep: Interrupt Performance counter stats for 'sleep 1' (10 runs): 0.680 +- 0.321 seconds time elapsed ( +- 47.16% ) Command exited with non-zero status 130 0.00user 0.01system 0:02.05elapsed 0%CPU (0avgtext+0avgdata 70688maxresident)k 0inputs+0outputs (0major+5002minor)pagefaults 0swaps ``` Note, this also changes the exit value for non-repeat runs when interrupted by a signal. Reported-by: Ingo Molnar <mingo@kernel.org> Closes: https://lore.kernel.org/lkml/aS5wjmbAM9ka3M2g@gmail.com/ Signed-off-by: Ian Rogers <irogers@google.com> Tested-by: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-05perf tests stat: Add test for error for an offline CPUIan Rogers1-0/+27
Add a test that if an offline CPU is requested perf stat will fail. $ perf test -vv "perf stat tests" 101: perf stat tests: --- start --- test child forked, pid 46965 Basic stat command test Basic stat command test [Success] Null stat command test Null stat command test [Success] Offline CPU stat command test (cpu 8) Offline CPU stat command test [Success] stat record and report test stat record and report test [Success] stat record and script test stat record and script test [Success] stat repeat weak groups test stat repeat weak groups test [Success] Topdown event group test Topdown event group test [Success] Topdown weak groups test Topdown weak groups test [Skipped event parsing failed] cputype test cputype test [Success] hybrid test hybrid test [Success] ---- end(0) ---- 101: perf stat tests : Ok Reported-by: Thomas Richter <tmricht@linux.ibm.com> Closes: https://lore.kernel.org/linux-perf-users/94313b82-888b-4f42-9fb0-4585f9e90080@linux.ibm.com/ Signed-off-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-04perf stat: When no events, don't report an error if there is noneIan Rogers1-2/+4
Events may fail to open as no supported CPUs were specified on the command line. In this case a confusing "error" message of "success" can be reported. Let's skip the error in that case. Before: ``` $ perf stat -C2048 -e cycles -- true WARNING: A requested CPU in '2048' is not supported by PMU 'cpu' (CPUs 0-7) for event 'cycles' Error: No supported events found. The sys_perf_event_open() syscall returned with 0 (Success) for event (cpu/unknown-hardware/). "dmesg | grep -i perf" may provide additional information. ``` After: ``` $ perf stat -C2048 -e cycles -- true WARNING: A requested CPU in '2048' is not supported by PMU 'cpu' (CPUs 0-7) for event 'cycles' Error: No supported events found. ``` Signed-off-by: Ian Rogers <irogers@google.com> Tested-by: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-04perf tests stat: Add "--null" coverageIan Rogers1-0/+12
Ensure "--null" does a minimal run. Reported-by: Ingo Molnar <mingo@kernel.org> Closes: https://lore.kernel.org/linux-perf-users/aSwt7yzFjVJCEmVp@gmail.com/ Tested-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Ian Rogers <irogers@google.com> Tested-by: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-04perf cpumap: Add "any" CPU handling to cpu_map__snprint_maskIan Rogers1-2/+7
If the perf_cpu_map is empty or is just the any CPU value, then early return. Don't process the "any" CPU when creating the bitmap. Tested-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Ian Rogers <irogers@google.com> Tested-by: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-04perf stat: Allow no events to open if this is a "--null" runIan Rogers1-1/+1
It is intended that a "--null" run doesn't open any events. Fixes: 2cc7aa995ce9 ("perf stat: Refactor retry/skip/fatal error handling") Tested-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Ian Rogers <irogers@google.com> Tested-by: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-04Merge tag 'net-next-6.19' of ↵Linus Torvalds1-4/+1
git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core & protocols: - Replace busylock at the Tx queuing layer with a lockless list. Resulting in a 300% (4x) improvement on heavy TX workloads, sending twice the number of packets per second, for half the cpu cycles. - Allow constantly busy flows to migrate to a more suitable CPU/NIC queue. Normally we perform queue re-selection when flow comes out of idle, but under extreme circumstances the flows may be constantly busy. Add sysctl to allow periodic rehashing even if it'd risk packet reordering. - Optimize the NAPI skb cache, make it larger, use it in more paths. - Attempt returning Tx skbs to the originating CPU (like we already did for Rx skbs). - Various data structure layout and prefetch optimizations from Eric. - Remove ktime_get() from the recvmsg() fast path, ktime_get() is sadly quite expensive on recent AMD machines. - Extend threaded NAPI polling to allow the kthread busy poll for packets. - Make MPTCP use Rx backlog processing. This lowers the lock pressure, improving the Rx performance. - Support memcg accounting of MPTCP socket memory. - Allow admin to opt sockets out of global protocol memory accounting (using a sysctl or BPF-based policy). The global limits are a poor fit for modern container workloads, where limits are imposed using cgroups. - Improve heuristics for when to kick off AF_UNIX garbage collection. - Allow users to control TCP SACK compression, and default to 33% of RTT. - Add tcp_rcvbuf_low_rtt sysctl to let datacenter users avoid unnecessarily aggressive rcvbuf growth and overshot when the connection RTT is low. - Preserve skb metadata space across skb_push / skb_pull operations. - Support for IPIP encapsulation in the nftables flowtable offload. - Support appending IP interface information to ICMP messages (RFC 5837). - Support setting max record size in TLS (RFC 8449). - Remove taking rtnl_lock from RTM_GETNEIGHTBL and RTM_SETNEIGHTBL. - Use a dedicated lock (and RCU) in MPLS, instead of rtnl_lock. - Let users configure the number of write buffers in SMC. - Add new struct sockaddr_unsized for sockaddr of unknown length, from Kees. - Some conversions away from the crypto_ahash API, from Eric Biggers. - Some preparations for slimming down struct page. - YAML Netlink protocol spec for WireGuard. - Add a tool on top of YAML Netlink specs/lib for reporting commonly computed derived statistics and summarized system state. Driver API: - Add CAN XL support to the CAN Netlink interface. - Add uAPI for reporting PHY Mean Square Error (MSE) diagnostics, as defined by the OPEN Alliance's "Advanced diagnostic features for 100BASE-T1 automotive Ethernet PHYs" specification. - Add DPLL phase-adjust-gran pin attribute (and implement it in zl3073x). - Refactor xfrm_input lock to reduce contention when NIC offloads IPsec and performs RSS. - Add info to devlink params whether the current setting is the default or a user override. Allow resetting back to default. - Add standard device stats for PSP crypto offload. - Leverage DSA frame broadcast to implement simple HSR frame duplication for a lot of switches without dedicated HSR offload. - Add uAPI defines for 1.6Tbps link modes. Device drivers: - Add Motorcomm YT921x gigabit Ethernet switch support. - Add MUCSE driver for N500/N210 1GbE NIC series. - Convert drivers to support dedicated ops for timestamping control, and away from the direct IOCTL handling. While at it support GET operations for PHY timestamping. - Add (and convert most drivers to) a dedicated ethtool callback for reading the Rx ring count. - Significant refactoring efforts in the STMMAC driver, which supports Synopsys turn-key MAC IP integrated into a ton of SoCs. - Ethernet high-speed NICs: - Broadcom (bnxt): - support PPS in/out on all pins - Intel (100G, ice, idpf): - ice: implement standard ethtool and timestamping stats - i40e: support setting the max number of MAC addresses per VF - iavf: support RSS of GTP tunnels for 5G and LTE deployments - nVidia/Mellanox (mlx5): - reduce downtime on interface reconfiguration - disable being an XDP redirect target by default (same as other drivers) to avoid wasting resources if feature is unused - Meta (fbnic): - add support for Linux-managed PCS on 25G, 50G, and 100G links - Wangxun: - support Rx descriptor merge, and Tx head writeback - support Rx coalescing offload - support 25G SPF and 40G QSFP modules - Ethernet virtual: - Google (gve): - allow ethtool to configure rx_buf_len - implement XDP HW RX Timestamping support for DQ descriptor format - Microsoft vNIC (mana): - support HW link state events - handle hardware recovery events when probing the device - Ethernet NICs consumer, and embedded: - usbnet: add support for Byte Queue Limits (BQL) - AMD (amd-xgbe): - add device selftests - NXP (enetc): - add i.MX94 support - Broadcom integrated MACs (bcmgenet, bcmasp): - bcmasp: add support for PHY-based Wake-on-LAN - Broadcom switches (b53): - support port isolation - support BCM5389/97/98 and BCM63XX ARL formats - Lantiq/MaxLinear switches: - support bridge FDB entries on the CPU port - use regmap for register access - allow user to enable/disable learning - support Energy Efficient Ethernet - support configuring RMII clock delays - add tagging driver for MaxLinear GSW1xx switches - Synopsys (stmmac): - support using the HW clock in free running mode - add Eswin EIC7700 support - add Rockchip RK3506 support - add Altera Agilex5 support - Cadence (macb): - cleanup and consolidate descriptor and DMA address handling - add EyeQ5 support - TI: - icssg-prueth: support AF_XDP - Airoha access points: - add missing Ethernet stats and link state callback - add AN7583 support - support out-of-order Tx completion processing - Power over Ethernet: - pd692x0: preserve PSE configuration across reboots - add support for TPS23881B devices - Ethernet PHYs: - Open Alliance OATC14 10BASE-T1S PHY cable diagnostic support - Support 50G SerDes and 100G interfaces in Linux-managed PHYs - micrel: - support for non PTP SKUs of lan8814 - enable in-band auto-negotiation on lan8814 - realtek: - cable testing support on RTL8224 - interrupt support on RTL8221B - motorcomm: support for PHY LEDs on YT853 - microchip: support for LAN867X Rev.D0 PHYs w/ SQI and cable diag - mscc: support for PHY LED control - CAN drivers: - m_can: add support for optional reset and system wake up - remove can_change_mtu() obsoleted by core handling - mcp251xfd: support GPIO controller functionality - Bluetooth: - add initial support for PASTa - WiFi: - split ieee80211.h file, it's way too big - improvements in VHT radiotap reporting, S1G, Channel Switch Announcement handling, rate tracking in mesh networks - improve multi-radio monitor mode support, and add a cfg80211 debugfs interface for it - HT action frame handling on 6 GHz - initial chanctx work towards NAN - MU-MIMO sniffer improvements - WiFi drivers: - RealTek (rtw89): - support USB devices RTL8852AU and RTL8852CU - initial work for RTL8922DE - improved injection support - Intel: - iwlwifi: new sniffer API support - MediaTek (mt76): - WED support for >32-bit DMA - airoha NPU support - regdomain improvements - continued WiFi7/MLO work - Qualcomm/Atheros: - ath10k: factory test support - ath11k: TX power insertion support - ath12k: BSS color change support - ath12k: statistics improvements - brcmfmac: Acer A1 840 tablet quirk - rtl8xxxu: 40 MHz connection fixes/support" * tag 'net-next-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1381 commits) net: page_pool: sanitise allocation order net: page pool: xa init with destroy on pp init net/mlx5e: Support XDP target xmit with dummy program net/mlx5e: Update XDP features in switch channels selftests/tc-testing: Test CAKE scheduler when enqueue drops packets net/sched: sch_cake: Fix incorrect qlen reduction in cake_drop wireguard: netlink: generate netlink code wireguard: uapi: generate header with ynl-gen wireguard: uapi: move flag enums wireguard: uapi: move enum wg_cmd wireguard: netlink: add YNL specification selftests: drv-net: Fix tolerance calculation in devlink_rate_tc_bw.py selftests: drv-net: Fix and clarify TC bandwidth split in devlink_rate_tc_bw.py selftests: drv-net: Set shell=True for sysfs writes in devlink_rate_tc_bw.py selftests: drv-net: Use Iperf3Runner in devlink_rate_tc_bw.py selftests: drv-net: introduce Iperf3Runner for measurement use cases selftests: drv-net: Add devlink_rate_tc_bw.py to TEST_PROGS net: ps3_gelic_net: Use napi_alloc_skb() and napi_gro_receive() Documentation: net: dsa: mention simple HSR offload helpers Documentation: net: dsa: mention availability of RedBox ...
2025-12-03perf test kvm: Add some basic perf kvm test coverageIan Rogers1-0/+154
Setup qemu with KVM then run kvm stat and some host recording/reporting/build-id tests. Signed-off-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-03perf tests evlist: Add basic evlist testIan Rogers1-0/+79
Add test that evlist reports expected events from perf record. Signed-off-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-03perf tests script dlfilter: Add a dlfilter testIan Rogers1-0/+107
Compile a simple dlfilter and make sure it remove samples from everything other than a test_loop. Signed-off-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-03perf tests kallsyms: Add basic kallsyms testIan Rogers1-0/+56
Add test that kallsyms finds a well known symbol and fails for another. Signed-off-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-03perf tests timechart: Add a perf timechart testIan Rogers1-0/+67
Basic coverage for `perf timechart` doing a record and then a basic sanity test of the generated SVG file. Signed-off-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-03perf tests top: Add basic perf top coverage testIan Rogers1-0/+74
The test starts a backgroup thloop workload and monitors it using cpu-clock ensuring test_loop appears in the output. Signed-off-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-03perf tests buildid: Add purge and remove testingIan Rogers1-26/+177
Add testing for the purge and remove commands. Use the noploop workload rather than just a return to avoid missing samples in the workload in perf record. Tidy up the cleanup code to cleanup when signals happen. Signed-off-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
generated by cgit v1.2.3 (git 2.39.0) at 2026-05-03 23:19:58 +0300