linux/tools/perf/tests/shell, branch v6.4

perf test: Add stat test for record and script

2023-05-10T17:36:18Z

When using the global aggregation mode, running perf script after perf stat record can result in a segmentation fault as seen with commit 8b76a3188b85 ("perf stat: Remove unused perf_counts.aggr field"). Add a basic test to the existing suite of stat-related tests for checking if that workflow runs without erroring out. Signed-off-by: Sandipan Das Acked-by: Namhyung Kim Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ananth Narayan Cc: Ian Rogers Cc: Ingo Molnar Cc: Jiri Olsa Cc: Mark Rutland Cc: Nick Terrell Cc: Peter Zijlstra Cc: Ravi Bangoria Link: https://lore.kernel.org/r/6a5429879764e3dac984cbb11ee2d95cc1604161.1683280603.git.sandipan.das@amd.com Signed-off-by: Arnaldo Carvalho de Melo

perf test test_intel_pt.sh: Test sample mode with event with PMU name

2023-05-10T17:19:20Z

br_misp_retired.all_branches is supported on processors that support Intel PT, so use it to test sample mode with an event that has been given a PMU name. Please note, the test fails prior to the fix "perf parse-events: Do not break up AUX event group". Signed-off-by: Adrian Hunter Cc: Ian Rogers Cc: Jiri Olsa Cc: Namhyung Kim Link: https://lore.kernel.org/r/20230508093952.27482-2-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf test java symbol: Remove needless debuginfod queries

2023-05-10T15:54:53Z

Test case 'Test java symbol' might run for a long time. On Fedora 38 the run time is very, very long: Output before: # time ./perf test 108 108: Test java symbol : Ok real 22m15.775s user 3m42.584s sys 4m30.685s # The reason is a lookup for the server for debug symbols as shown in: # cat /etc/debuginfod/elfutils.urls https://debuginfod.fedoraproject.org/ # This lookup is done for every symbol/sample, so about 3500 lookups will take place. To omit this lookup, which is not needed, unset environment variable DEBUGINFOD_URLS=''. Output after: # time ./perf test 108 108: Test java symbol : Ok real 0m6.242s user 0m4.982s sys 0m3.243s # Signed-off-by: Thomas Richter Tested-by: Arnaldo Carvalho de Melo Cc: Heiko Carstens Cc: Ian Rogers Cc: Leo Yan Cc: Sumanth Korikkar Cc: Sven Schnelle Cc: Vasily Gorbik Link: https://lore.kernel.org/r/20230509131847.835974-1-tmricht@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo

Revert "perf build: Make BUILD_BPF_SKEL default, rename to NO_BPF_SKEL"

2023-05-06T21:07:37Z

This reverts commit a980755beb5aca9002e1c95ba519b83a44242b5b. We need to better polish building with BPF skels, so revert back to making it an experimental feature that has to be explicitely enabled using BUILD_BPF_SKEL=1. Signed-off-by: Arnaldo Carvalho de Melo

perf test record+probe_libc_inet_pton: Fix call chain match on x86_64

2023-05-03T14:02:21Z

The test case probe libc's inet_pton & backtrace it with ping fails with Fedora 38 on x86_64. Function getaddrinfo() does not show up in the call chain anymore: # ./perf script ping 1803 [000] 728.567146: probe_libc:inet_pton: (7f5275afc840) 133840 __GI___inet_pton+0x0 (/usr/lib64/libc.so.6) 27b4a __libc_start_call_main+0x7a (/usr/lib64/libc.so.6) 27c0b __libc_start_main@@GLIBC_2.34+0x8b (/usr/lib64/libc.so.6) ping 1803 [000] 728.567184: probe_libc:inet_pton: (7f5275afc840) 133840 __GI___inet_pton+0x0 (/usr/lib64/libc.so.6) 493e main+0xcde (/usr/bin/ping) 27b4a __libc_start_call_main+0x7a (/usr/lib64/libc.so.6) # which causes the test case to fail. Remove function getaddrinfo() from list of expected functions. Output before: # ./perf test 'libc' 91: probe libc's inet_pton & backtrace it with ping : FAILED! # Output after: # ./perf test 'libc' 91: probe libc's inet_pton & backtrace it with ping : Ok # Signed-off-by: Thomas Richter Tested-by: Arnaldo Carvalho de Melo Cc: Heiko Carstens Cc: Sumanth Korikkar Cc: Sven Schnelle Cc: Vasily Gorbik Link: https://lore.kernel.org/r/20230503081255.3372986-1-tmricht@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo

perf test record+probe_libc_inet_pton: Fix call chain match on s390

2023-05-03T14:00:44Z

With Fedora 38 the perf test 86 probe libc's inet_pton fails on s390. The call chain of the ping command changed. The functions text_to_binary_address() and gaih_inet() do not show up in the call chain anymore. Output before: # ./perf test -v 86 86: probe libc's inet_pton & backtrace it with ping : --- start --- test child forked, pid 541050 fgrep: warning: fgrep is obsolescent; using grep -F fgrep: warning: fgrep is obsolescent; using grep -F BFD: DWARF error: could not find variable specification at offset 0x22011 ... ping 541078 [002] 348826.679581: probe_libc:inet_pton_1: (3ffad84b940) 14b940 __GI___inet_pton+0x0 (/usr/lib64/libc.so.6) 10e9c3 __GI_getaddrinfo+0xeb3 (inlined) 4397 main+0x737 (/usr/bin/ping) FAIL: expected backtrace entry "gaih_inet.*\+0x[[:xdigit:]]\ +[[:space:]]$/usr/lib64/libc.so.6|inlined$$" got "4397 main+0x737 (/usr/bin/ping)" test child finished with -1 ---- end ---- probe libc's inet_pton & backtrace it with ping: FAILED! # Output after: # ./perf test -v 86 86: probe libc's inet_pton & backtrace it with ping : --- start --- test child forked, pid 541098 fgrep: warning: fgrep is obsolescent; using grep -F fgrep: warning: fgrep is obsolescent; using grep -F BFD: DWARF error: could not find variable specification at offset 0x309d1 ... ping 541126 [006] 349309.099067: probe_libc:inet_pton_1: (3ffb7f4b940) 14b940 __GI___inet_pton+0x0 (/usr/lib64/libc.so.6) 10e9c3 __GI_getaddrinfo+0xeb3 (inlined) 4397 main+0x737 (/usr/bin/ping) test child finished with 0 ---- end ---- probe libc's inet_pton & backtrace it with ping: Ok # Signed-off-by: Thomas Richter Cc: Heiko Carstens Cc: Sumanth Korikkar Cc: Sven Schnelle Cc: Vasily Gorbik Link: https://lore.kernel.org/r/20230503081134.3372415-1-tmricht@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo

perf cs-etm: Add separate decode paths for timeless and per-thread modes

2023-04-24T17:42:20Z

Timeless and per-thread are orthogonal concepts that are currently treated as if they are the same (per-thread == timeless). This breaks when you modify the command line or itrace options to something that the current logic doesn't expect. For example: # Force timeless with Z --itrace=Zi10i # Or inconsistent record options -e cs_etm/timestamp=1/ --per-thread Adding Z for decoding in per-cpu mode is particularly bad because in per-thread mode trace channel IDs are discarded and all assumed to be 0, which would mix trace from different CPUs in per-cpu mode. Although the results might not be perfect in all scenarios, if the user requests no timestamps, it should still be possible to decode in either mode. Especially if the relative times of samples in different processes aren't interesting, quite a bit of space can be saved by turning off timestamps in per-cpu mode. Signed-off-by: James Clark Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Denis Nikitin Cc: Ian Rogers Cc: Ingo Molnar Cc: Jiri Olsa Cc: John Garry Cc: Leo Yan Cc: Mark Rutland Cc: Mathieu Poirier Cc: Mike Leach Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Suzuki Poulouse Cc: Will Deacon Cc: Yang Shi Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20230424134748.228137-8-james.clark@arm.com Signed-off-by: Arnaldo Carvalho de Melo

perf test stat+json_output: Write JSON output to a file

2023-04-10T22:15:53Z

Write the JSON output to a file, then sanity check this output. This avoids problems with debug/warning/error output corrupting the file format. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Athira Rajeev Cc: Ingo Molnar Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Sumanth Korikkar Cc: Thomas Richter Link: https://lore.kernel.org/r/20230408054456.3001367-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf test stat+csv_output: Write CSV output to a file

2023-04-10T22:15:33Z

Write the CSV output to a file, then sanity check this output. This avoids problems with debug/warning/error output corrupting the file format. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Athira Rajeev Cc: Ingo Molnar Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Sumanth Korikkar Cc: Thomas Richter Link: https://lore.kernel.org/r/20230408054456.3001367-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf tests record_offcpu.sh: Fix redirection of stderr to stdin

2023-04-04T12:39:55Z

It's not 2&>1, the correct is 2>&1 Fixes: ade1d0307b2fb3d9 ("perf offcpu: Update offcpu test for child process") Signed-off-by: Patrice Duroux Acked-by: Ian Rogers Cc: Namhyung Kim Link: https://lore.kernel.org/r/20230303193058.21274-1-patrice.duroux@gmail.com Signed-off-by: Arnaldo Carvalho de Melo