linux/tools/perf/tests/code-reading.c, branch v5.0

perf tools: Allow specifying proc-map-timeout in config file

2018-12-17T17:56:57Z

The default timeout of 500ms for parsing /proc//maps files is too short for profiling many of our services. This can be overridden by passing --proc-map-timeout to the relevant command but it'd be nice to globally increase our default value. This patch permits setting a different default with the core.proc-map-timeout config file parameter. Signed-off-by: Mark Drayton Acked-by: Song Liu Acked-by: Namhyung Kim Cc: Alexander Shishkin Cc: Jiri Olsa Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20181204203420.1683114-1-mbd@fb.com Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Get rid of dso__needs_decompress() call in read_object_code()

2018-08-20T11:54:59Z

There's no need to call dso__needs_decompress() twice in the function. Signed-off-by: Jiri Olsa Cc: Alexander Shishkin Cc: David Ahern Cc: Michael Petlan Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20180817094813.15086-2-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf test code-reading: Fix perf_env setup for PTI entry trampolines

2018-06-06T15:52:05Z

The "Object code reading" test will not create maps for the PTI entry trampolines unless the machine environment exists to show that the arch is x86_64. Signed-off-by: Adrian Hunter Reported-by: Arnaldo Carvalho de Melo Tested-by: Arnaldo Carvalho de Melo Cc: Jiri Olsa Link: http://lkml.kernel.org/r/1528183800-21577-1-git-send-email-adrian.hunter@intel.com [ split from a larger patch ] Signed-off-by: Arnaldo Carvalho de Melo

perf thread: Make thread__find_map() return the map

2018-04-26T16:47:08Z

It was returning the searched map just on the addr_location passed, with the function itself returning void. Make it return the map so that we can make the code more compact. Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: https://lkml.kernel.org/n/tip-tzlrrzdeoof4i6ktyqv1t6ks@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf thread: Introduce thread__find_map()

2018-04-26T16:47:06Z

Out of thread__find_add_map(..., MAP__FUNCTION, ...), idea here is to continue removing references to MAP__{FUNCTION,VARIABLE} ahead of getting both types of symbols in the same rbtree, as various places do two lookups, looking first at MAP__FUNCTION, then at MAP__VARIABLE. So thread__find_map() will eventually do just that, and 'struct symbol' will have the symbol type, for code that cares about that. Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: https://lkml.kernel.org/n/tip-q27xee34l4izpfau49w103s6@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf mmap: Simplify perf_mmap__read_init()

2018-03-08T13:05:53Z

It isn't necessary to pass the 'start', 'end' and 'overwrite' arguments to perf_mmap__read_init(). The data is stored in the struct perf_mmap. Discard the parameters. Signed-off-by: Kan Liang Suggested-by: Arnaldo Carvalho de Melo Acked-by: Jiri Olsa Cc: Andi Kleen Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/r/1520350567-80082-8-git-send-email-kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf mmap: Simplify perf_mmap__read_event()

2018-03-08T13:05:53Z

It isn't necessary to pass the 'overwrite', 'start' and 'end' argument to perf_mmap__read_event(). Discard them. Signed-off-by: Kan Liang Suggested-by: Arnaldo Carvalho de Melo Acked-by: Jiri Olsa Cc: Andi Kleen Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/r/1520350567-80082-7-git-send-email-kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf mmap: Simplify perf_mmap__consume()

2018-03-08T13:05:52Z

It isn't necessary to pass the 'overwrite' argument to perf_mmap__consume(). Discard it. Signed-off-by: Kan Liang Suggested-by: Arnaldo Carvalho de Melo Acked-by: Jiri Olsa Cc: Andi Kleen Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/r/1520350567-80082-6-git-send-email-kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf test: Switch to new perf_mmap__read_event() interface for 'code reading' test

2018-03-05T13:48:36Z

The perf test 'object code reading' still use the legacy interface. No functional change. Committer notes: Testing: # perf test reading 23: Object code reading: Ok # Signed-off-by: Kan Liang Tested-by: Arnaldo Carvalho de Melo Cc: Andi Kleen Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/r/1519945751-37786-5-git-send-email-kan.liang@linux.intel.com [ Changed bool parameters from 0 to 'false', as per Jiri comment ] Signed-off-by: Arnaldo Carvalho de Melo

perf test: Fix test case 23 for s390 z/VM or KVM guests

2018-02-16T18:16:57Z

On s390 perf can be executed on a LPAR with support for hardware events (i. e. cycles) or on a z/VM or KVM guest where no hardware events are supported. In this environment use software event named cpu-clock for this test case. Use the cpuid infrastructure functions to determine the cpuid on s390 which contains an indication of the cpu counter facility availability. Signed-off-by: Thomas Richter Reviewed-by: Hendrik Brueckner Cc: Heiko Carstens Cc: Martin Schwidefsky Link: http://lkml.kernel.org/r/20180213151419.80737-4-tmricht@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo