| commit | 4cb93446c587d56e2a54f4f83113daba2c0b6dee | [log] [tgz] |
|---|---|---|
| author | Arnaldo Carvalho de Melo <[email protected]> | Wed Apr 27 10:16:24 2016 -0300 |
| committer | Arnaldo Carvalho de Melo <[email protected]> | Wed Apr 27 10:29:07 2016 -0300 |
| tree | a251b1d510831dc071eadbbbe3e38a85fe643365 | |
| parent | c5dfd78eb79851e278b7973031b9ca363da87a7e [diff] |
perf tools: Set the maximum allowed stack from /proc/sys/kernel/perf_event_max_stack 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 <[email protected]> Cc: Brendan Gregg <[email protected]> Cc: David Ahern <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Milian Wolff <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Wang Nan <[email protected]> Link: http://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>