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| author | Changbin Du <changbin.du@gmail.com> | 2020-08-08 04:31:31 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-08-14 14:16:43 +0200 |
| commit | b1d84af6f58022a0d75f5745367624549cd0bfbf (patch) | |
| tree | 1e3f8bfc3b1794de14fb590f2b796d5241ce1023 /tools/perf/Documentation | |
| parent | perf tools: Add general function to parse sublevel options (diff) | |
| download | linux-b1d84af6f58022a0d75f5745367624549cd0bfbf.tar.xz linux-b1d84af6f58022a0d75f5745367624549cd0bfbf.zip | |
perf ftrace: Add support for tracing option 'func_stack_trace'
This adds support to display call trace for function tracer. To do this,
just specify a '--func-opts call-graph' option.
Example:
$ sudo perf ftrace -T vfs_read --func-opts call-graph
iio-sensor-prox-855 [003] 6168.369657: vfs_read <-ksys_read
iio-sensor-prox-855 [003] 6168.369677: <stack trace>
=> vfs_read
=> ksys_read
=> __x64_sys_read
=> do_syscall_64
=> entry_SYSCALL_64_after_hwframe
...
Signed-off-by: Changbin Du <changbin.du@gmail.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Link: http://lore.kernel.org/lkml/20200808023141.14227-9-changbin.du@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation')
| -rw-r--r-- | tools/perf/Documentation/perf-ftrace.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-ftrace.txt b/tools/perf/Documentation/perf-ftrace.txt index c46d0a09b38c..8f08ad0992c2 100644 --- a/tools/perf/Documentation/perf-ftrace.txt +++ b/tools/perf/Documentation/perf-ftrace.txt @@ -76,6 +76,10 @@ OPTIONS specify multiple functions (or glob patterns). It will be passed to 'set_ftrace_notrace' in tracefs. +--func-opts:: + List of options allowed to set: + call-graph - Display kernel stack trace for function tracer. + -G:: --graph-funcs=:: Select function_graph tracer and set graph filter on the given |