kernel/linux.git/tools/perf/util/util.h, branch linux-4.7.y

perf tools: Separate accounting of contexts and real addresses in a stack trace

2016-05-17T02:11:54+00:00

The perf_sample->ip_callchain->nr value includes all the entries in the ip_callchain->ip[] array, real addresses and PERF_CONTEXT_{KERNEL,USER,etc}, while what the user expects is that what is in the kernel.perf_event_max_stack sysctl or in the upcoming per event perf_event_attr.sample_max_stack knob be honoured in terms of IP addresses in the stack trace. So match the kernel support and validate chain->nr taking into account both kernel.perf_event_max_stack and kernel.perf_event_max_contexts_per_stack. Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Alexei Starovoitov Cc: Brendan Gregg Cc: David Ahern Cc: Frederic Weisbecker Cc: He Kuang Cc: Jiri Olsa Cc: Masami Hiramatsu Cc: Milian Wolff Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Thomas Gleixner Cc: Vince Weaver Cc: Wang Nan Cc: Zefan Li Link: http://lkml.kernel.org/n/tip-mgx0jpzfdq4uq4abfa40byu0@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Remove xrealloc and ALLOC_GROW

2016-05-10T14:58:27+00:00

Remove unused xrealloc() and ALLOC_GROW() from libperf. Signed-off-by: Masami Hiramatsu Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20160510054801.6158.6204.stgit@devbox Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Set the maximum allowed stack from /proc/sys/kernel/perf_event_max_stack

2016-04-27T13:29:07+00:00

There is an upper limit to what tooling considers a valid callchain, and it was tied to the hardcoded value in the kernel, PERF_MAX_STACK_DEPTH (127), now that this can be tuned via a sysctl, make it read it and use that as the upper limit, falling back to PERF_MAX_STACK_DEPTH for kernels where this sysctl isn't present. Cc: Adrian Hunter Cc: Brendan Gregg Cc: David Ahern Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Milian Wolff Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-yjqsd30nnkogvj5oyx9ghir9@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Add lsdir() helper to read a directory

2016-04-26T16:14:55+00:00

As a utility function, add lsdir() which reads given directory and store entry name into a strlist. lsdir accepts a filter function so that user can filter out unneeded entries. Signed-off-by: Masami Hiramatsu Signed-off-by: Masami Hiramatsu Cc: Ananth N Mavinakayanahalli Cc: Hemant Kumar Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20160426090242.11891.79014.stgit@devbox [ Do not use the 'dirname' it is used in some distros ] Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Introduce trim function

2016-04-07T13:21:49+00:00

To be used in cases for both sides trim. Signed-off-by: Jiri Olsa Cc: Andreas Hollmann Cc: David Ahern Cc: Milian Wolff Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1460013073-18444-1-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Remove unused perf_pathdup, xstrdup functions

2016-03-23T18:27:33+00:00

Cc: Adrian Hunter Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-s87zi5d03m6rz622y1z6rlsa@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Do not include stringify.h from the kernel sources

2016-03-23T18:21:15+00:00

Use instead the copy just made to tools/include/linux/. Cc: Adrian Hunter Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-q736w12nwy98x5ox2hamp5ow@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Remove needless 'extern' from function prototypes

2016-03-23T18:06:35+00:00

Cc: Adrian Hunter Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-w246stf7ponfamclsai6b9zo@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Simplify die() mechanism

2016-03-23T15:32:31+00:00

This should die altogether, but for now lets remove a bit of this stuff, as it is not used at all. Cc: Adrian Hunter Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-ade3n99xscldhg5mx2vzd8p3@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Remove unused DIE_IF macro

2016-03-23T15:30:42+00:00

Cc: Adrian Hunter Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-elxg25jd4dhwod4wqbko87qh@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo