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| author | Steven Rostedt <rostedt@goodmis.org> | 2016-07-06 15:25:08 -0400 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2016-11-15 15:13:59 -0500 |
| commit | fa32e8557b470f5ff90babc6cbacc61535a81a0f (patch) | |
| tree | fa3fdc74436987c4832e2941659efa1b6f22d874 /Documentation/trace | |
| parent | 9648dc15772d77b5431cd5c11675d90eee1a4c2f (diff) | |
| download | lwn-fa32e8557b470f5ff90babc6cbacc61535a81a0f.tar.gz lwn-fa32e8557b470f5ff90babc6cbacc61535a81a0f.zip | |
tracing: Add new trace_marker_raw
A new file is created:
/sys/kernel/debug/tracing/trace_marker_raw
This allows for appications to create data structures and write the binary
data directly into it, and then read the trace data out from trace_pipe_raw
into the same type of data structure. This saves on converting numbers into
ASCII that would be required by trace_marker.
Suggested-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'Documentation/trace')
| -rw-r--r-- | Documentation/trace/ftrace.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/trace/ftrace.txt b/Documentation/trace/ftrace.txt index 1bc66c1db0cb..6c374c5fe400 100644 --- a/Documentation/trace/ftrace.txt +++ b/Documentation/trace/ftrace.txt @@ -396,6 +396,12 @@ of ftrace. Here is a list of some of the key files: trace_fd = open("trace_marker", WR_ONLY); + trace_marker_raw: + + This is similar to trace_marker above, but is meant for for binary data + to be written to it, where a tool can be used to parse the data + from trace_pipe_raw. + uprobe_events: Add dynamic tracepoints in programs. |