linux/tools/perf/tests, branch v5.8

perf tests: Fix test 68 zstd compression for s390

2020-07-31T12:27:32Z

Commit 5aa98879efe7 ("s390/cpum_sf: prohibit callchain data collection") prohibits call graph sampling for hardware events on s390. The information recorded is out of context and does not match. On s390 this commit now breaks test case 68 Zstd perf.data compression/decompression. Therefore omit call graph sampling on s390 in this test. Output before: [root@t35lp46 perf]# ./perf test -Fv 68 68: Zstd perf.data compression/decompression : --- start --- Collecting compressed record file: Error: cycles: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat' ---- end ---- Zstd perf.data compression/decompression: FAILED! [root@t35lp46 perf]# Output after: [root@t35lp46 perf]# ./perf test -Fv 68 68: Zstd perf.data compression/decompression : --- start --- Collecting compressed record file: 500+0 records in 500+0 records out 256000 bytes (256 kB, 250 KiB) copied, 0.00615638 s, 41.6 MB/s [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.004 MB /tmp/perf.data.X3M, compressed (original 0.002 MB, ratio is 3.609) ] Checking compressed events stats: # compressed : Zstd, level = 1, ratio = 4 COMPRESSED events: 1 2ELIFREPh---- end ---- Zstd perf.data compression/decompression: Ok [root@t35lp46 perf]# Signed-off-by: Thomas Richter Reviewed-by: Sumanth Korikkar Cc: Heiko Carstens Cc: Sven Schnelle Cc: Vasily Gorbik Link: http://lore.kernel.org/lkml/20200729135314.91281-1-tmricht@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo

perf test: Initialize memory in dwarf-unwind

2020-06-01T15:24:23Z

Avoid a false positive caused by assembly code in arch/x86. In tests, zero the perf_event to avoid uninitialized memory uses. Warnings were caught using clang with -fsanitize=memory. Signed-off-by: Ian Rogers Cc: Alexander Shishkin Cc: Alexei Starovoitov Cc: Jakub Kicinski Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Quentin Monnet Cc: Stephane Eranian Cc: clang-built-linux@googlegroups.com Link: http://lore.kernel.org/lkml/20200530082015.39162-4-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf tests: Don't tail call optimize in unwind test

2020-06-01T15:24:23Z

The tail call optimization can unexpectedly make the stack smaller and cause the test to fail. Signed-off-by: Ian Rogers Cc: Alexander Shishkin Cc: Alexei Starovoitov Cc: clang-built-linux@googlegroups.com Cc: Jakub Kicinski Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Quentin Monnet Cc: Stephane Eranian Link: http://lore.kernel.org/lkml/20200530082015.39162-3-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf build: Add a LIBPFM4=1 build test entry

2020-05-29T19:51:38Z

So that when one runs: $ make -C tools/perf build-test We make sure that recent changes don't break that opt-in build. Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Alexei Starovoitov Cc: Alexey Budankov Cc: Andi Kleen Cc: Andrii Nakryiko Cc: Daniel Borkmann Cc: Florian Fainelli Cc: Greg Kroah-Hartman Cc: Ian Rogers Cc: Igor Lubashev Cc: Jin Yao Cc: Jiri Olsa Cc: Jiwei Sun Cc: John Garry Cc: Kan Liang Cc: Leo Yan Cc: Mark Rutland Cc: Martin KaFai Lau Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Thomas Gleixner Cc: Yonghong Song Cc: yuzhoujian Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Add optional support for libpfm4

2020-05-29T19:51:38Z

This patch links perf with the libpfm4 library if it is available and LIBPFM4 is passed to the build. The libpfm4 library contains hardware event tables for all processors supported by perf_events. It is a helper library that helps convert from a symbolic event name to the event encoding required by the underlying kernel interface. This library is open-source and available from: http://perfmon2.sf.net. With this patch, it is possible to specify full hardware events by name. Hardware filters are also supported. Events must be specified via the --pfm-events and not -e option. Both options are active at the same time and it is possible to mix and match: $ perf stat --pfm-events inst_retired:any_p:c=1:i -e cycles .... One needs to explicitely ask for its inclusion by using the LIBPFM4 make command line option, ie its opt-in rather than opt-out of feature detection and build support. Signed-off-by: Stephane Eranian Reviewed-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Alexei Starovoitov Cc: Alexey Budankov Cc: Andi Kleen Cc: Andrii Nakryiko Cc: Daniel Borkmann Cc: Florian Fainelli Cc: Greg Kroah-Hartman Cc: Igor Lubashev Cc: Jin Yao Cc: Jiri Olsa Cc: Jiwei Sun Cc: John Garry Cc: Kan Liang Cc: Leo Yan Cc: Mark Rutland Cc: Martin KaFai Lau Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Yonghong Song Cc: bpf@vger.kernel.org Cc: netdev@vger.kernel.org Cc: yuzhoujian Link: http://lore.kernel.org/lkml/20200505182943.218248-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf build: Add NO_SDT=1 to the default set of build tests

2020-05-29T19:51:38Z

We forgot to add it, so one would have to explicitely ask for it to be run, fix that by adding it to the set of tests that are performed by default when one does: $ make -C tools/perf build-test It was being exercised only in the make_minimal test, this patch makes it be tested in isolation, i.e. disabling only this feature. Fixes: e26e63be64a1 ("perf build: Add sdt feature detection") Cc: Adrian Hunter Cc: Jiri Olsa Cc: Masami Hiramatsu Cc: Namhyung Kim Signed-off-by: Arnaldo Carvalho de Melo

perf build: Add NO_LIBCRYPTO=1 to the default set of build tests

2020-05-29T19:51:38Z

We forgot to add it, so one would have to explicitely ask for it to be run, fix that by adding it to the set of tests that are performed by default when one does: $ make -C tools/perf build-test It was being exercised only in the make_minimal test, this patch makes it be tested in isolation, i.e. disabling only this feature. Fixes: 8ee4646038e4 ("perf build: Add libcrypto feature detection") Cc: Stephane Eranian Cc: Adrian Hunter Cc: Jiri Olsa Cc: Namhyung Kim Signed-off-by: Arnaldo Carvalho de Melo

perf build: Add NO_SYSCALL_TABLE=1 to the build tests

2020-05-29T19:51:16Z

So that we make sure that even on x86-64 and other architectures where that is the default method we test build the fallback to libaudit that other architectures use. I.e. now this line got added to: $ make -C tools/perf build-test make_no_syscall_tbl_O: cd . && make NO_SYSCALL_TABLE=1 FEATURES_DUMP=/home/acme/git/perf/tools/perf/BUILD_TEST_FEATURE_DUMP -j12 O=/tmp/tmp.W0HtKR1mfr DESTDIR=/tmp/tmp.lNezgCVPzW $ Cc: Adrian Hunter Cc: Ingo Molnar Cc: Jiri Olsa Cc: Namhyung Kim Signed-off-by: Arnaldo Carvalho de Melo

perf tests: Add test for the java demangler

2020-05-28T13:03:28Z

Split from a larger patch that was also fixing a problem with the java demangler, so, before applying that patch we see: $ perf test java 65: Demangle Java : FAILED! $ perf test -v java 65: Demangle Java : --- start --- test child forked, pid 307264 FAILED: Ljava/lang/StringLatin1;equals([B[B)Z: bool class java.lang.StringLatin1.equals(byte[], byte[]) != boolean java.lang.StringLatin1.equals(byte[], byte[]) FAILED: Ljava/util/zip/ZipUtils;CENSIZ([BI)J: long class java.util.zip.ZipUtils.CENSIZ(byte[], int) != long java.util.zip.ZipUtils.CENSIZ(byte[], int) FAILED: Ljava/util/regex/Pattern$BmpCharProperty;match(Ljava/util/regex/Matcher;ILjava/lang/CharSequence;)Z: bool class java.util.regex.Pattern$BmpCharProperty.match(class java.util.regex.Matcher., int, class java.lang., charhar, shortequence) != boolean java.util.regex.Pattern$BmpCharProperty.match(java.util.regex.Matcher, int, java.lang.CharSequence) FAILED: Ljava/lang/AbstractStringBuilder;appendChars(Ljava/lang/String;II)V: void class java.lang.AbstractStringBuilder.appendChars(class java.lang., shorttring., int, int) != void java.lang.AbstractStringBuilder.appendChars(java.lang.String, int, int) FAILED: Ljava/lang/Object;()V: void class java.lang.Object() != void java.lang.Object() test child finished with -1 ---- end ---- Demangle Java: FAILED! $ Next patch should fix this. Signed-off-by: Nick Gasson Reviewed-by: Ian Rogers Tested-by: Arnaldo Carvalho de Melo Tested-by: Ian Rogers Cc: Alexander Shishkin Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lore.kernel.org/lkml/20200427061520.24905-4-nick.gasson@arm.com Signed-off-by: Arnaldo Carvalho de Melo

perf tests: Consider subtests when searching for user specified tests

2020-05-28T13:03:28Z

It's now possible to put subtest name as a test filter: $ perf test 'PMU event table sanity' 10: PMU events : 10.1: PMU event table sanity : Ok Committer testing: Before: $ perf test 'PMU event table sanity' $ After: $ perf test 'PMU event table sanity' 10: PMU events : 10.1: PMU event table sanity : Ok $ Signed-off-by: Jiri Olsa Tested-by: Arnaldo Carvalho de Melo Cc: Alexander Shishkin Cc: Andi Kleen Cc: Ian Rogers Cc: Michael Petlan Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lore.kernel.org/lkml/20200524224219.234847-2-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo