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| author | Steven Rostedt (Google) <rostedt@goodmis.org> | 2023-12-28 22:16:46 -0500 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2023-12-28 22:26:09 -0500 |
| commit | c38853de5ad6e55218ecf6b19760f27364699776 (patch) | |
| tree | 1a92e1092ebcb0b469a6f856338ac1b3660e9389 | |
| parent | 6abf2ad80ccc9865d0c49995af08318e7788c17e (diff) | |
| download | trace-cmd-c38853de5ad6e55218ecf6b19760f27364699776.tar.gz | |
trace-cmd show: Add option to read buffer_percent
Add trace-cmd show --buffer_percent to show the value of the buffer_percent
file.
Link: https://lore.kernel.org/linux-trace-devel/20231229031907.69432-4-rostedt@goodmis.org
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
| -rw-r--r-- | Documentation/trace-cmd/trace-cmd-show.1.txt | 8 | ||||
| -rw-r--r-- | tracecmd/trace-show.c | 6 | ||||
| -rw-r--r-- | tracecmd/trace-usage.c | 1 |
3 files changed, 15 insertions, 0 deletions
diff --git a/Documentation/trace-cmd/trace-cmd-show.1.txt b/Documentation/trace-cmd/trace-cmd-show.1.txt index ac40dacf..f85c070b 100644 --- a/Documentation/trace-cmd/trace-cmd-show.1.txt +++ b/Documentation/trace-cmd/trace-cmd-show.1.txt @@ -65,6 +65,14 @@ OPTIONS The ring buffer is broken up into equal size sub-buffers were an event can only be as big as the sub-buffer data section (the size minus its meta data). +*--buffer_percent*:: + Show the percentage the buffer must be filled before a reader that is blocked + on the trace_pipe_raw file will be woken up. + + 0 : wake up immediately on any new data + 1 - 99 : wake up on this percentage of the sub-buffers being full + 100 : wake up after the buffer is full and the writer is on the last sub-buffer + *--ftrace_filter*:: Show what function filters are set. diff --git a/tracecmd/trace-show.c b/tracecmd/trace-show.c index 17eb0989..d91362e4 100644 --- a/tracecmd/trace-show.c +++ b/tracecmd/trace-show.c @@ -20,6 +20,7 @@ enum { OPT_buffer_subbuf_size_kb, OPT_buffer_total_size_kb, OPT_buffer_size_kb, + OPT_buffer_percent, OPT_current_tracer, OPT_tracing_on, }; @@ -44,6 +45,7 @@ void trace_show(int argc, char **argv) {"buffer_size", no_argument, NULL, OPT_buffer_size_kb}, {"buffer_total_size", no_argument, NULL, OPT_buffer_total_size_kb}, {"buffer_subbuf_size", no_argument, NULL, OPT_buffer_subbuf_size_kb}, + {"buffer_percent", no_argument, NULL, OPT_buffer_percent}, {"ftrace_filter", no_argument, NULL, OPT_ftrace_filter}, {"ftrace_notrace", no_argument, NULL, OPT_ftrace_notrace}, {"ftrace_pid", no_argument, NULL, OPT_ftrace_pid}, @@ -108,6 +110,10 @@ void trace_show(int argc, char **argv) show_instance_file(instance, "buffer_subbuf_size_kb"); stop = 1; break; + case OPT_buffer_percent: + show_instance_file(instance, "buffer_percent"); + stop = 1; + break; case OPT_ftrace_filter: show_instance_file(instance, "set_ftrace_filter"); stop = 1; diff --git a/tracecmd/trace-usage.c b/tracecmd/trace-usage.c index 7dc9b187..3e5456d2 100644 --- a/tracecmd/trace-usage.c +++ b/tracecmd/trace-usage.c @@ -181,6 +181,7 @@ static struct usage_help usage_help[] = { " --buffer_size (for buffer_size_kb)\n" " --buffer_total_size (for buffer_total_size_kb)\n" " --buffer_subbuf_size (for buffer_subbuf_size_kb)\n" + " --buffer_percent (for buffer_percent)\n" " --ftrace_filter (for set_ftrace_filter)\n" " --ftrace_notrace (for set_ftrace_notrace)\n" " --ftrace_pid (for set_ftrace_pid)\n" |