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authorLinus Torvalds <torvalds@linux-foundation.org>2016-12-15 13:49:34 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-15 13:49:34 -0800
commit179a7ba6806805bd4cd7a5e4574b83353c5615ad (patch)
tree58855a59ba3bd66f947c3f9781cd44a7329c7d75 /Documentation/trace/ftrace.txt
parent5e176d6973bdac04d9f298ca384c39f08eb084cb (diff)
parent3dbb16b87b57bb1088044ad2a0432e4769075002 (diff)
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Merge tag 'trace-v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing updates from Steven Rostedt: "This release has a few updates: - STM can hook into the function tracer - Function filtering now supports more advance glob matching - Ftrace selftests updates and added tests - Softirq tag in traces now show only softirqs - ARM nop added to non traced locations at compile time - New trace_marker_raw file that allows for binary input - Optimizations to the ring buffer - Removal of kmap in trace_marker - Wakeup and irqsoff tracers now adhere to the set_graph_notrace file - Other various fixes and clean ups" * tag 'trace-v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (42 commits) selftests: ftrace: Shift down default message verbosity kprobes/trace: Fix kprobe selftest for newer gcc tracing/kprobes: Add a helper method to return number of probe hits tracing/rb: Init the CPU mask on allocation tracing: Use SOFTIRQ_OFFSET for softirq dectection for more accurate results tracing/fgraph: Have wakeup and irqsoff tracers ignore graph functions too fgraph: Handle a case where a tracer ignores set_graph_notrace tracing: Replace kmap with copy_from_user() in trace_marker writing ftrace/x86_32: Set ftrace_stub to weak to prevent gcc from using short jumps to it tracing: Allow benchmark to be enabled at early_initcall() tracing: Have system enable return error if one of the events fail tracing: Do not start benchmark on boot up tracing: Have the reg function allow to fail ring-buffer: Force rb_end_commit() and rb_set_commit_to_write() inline ring-buffer: Froce rb_update_write_stamp() to be inlined ring-buffer: Force inline of hotpath helper functions tracing: Make __buffer_unlock_commit() always_inline tracing: Make tracepoint_printk a static_key ring-buffer: Always inline rb_event_data() ring-buffer: Make rb_reserve_next_event() always inlined ...
Diffstat (limited to 'Documentation/trace/ftrace.txt')
-rw-r--r--Documentation/trace/ftrace.txt15
1 files changed, 9 insertions, 6 deletions
diff --git a/Documentation/trace/ftrace.txt b/Documentation/trace/ftrace.txt
index 5596e2d71d6d..006f47c7d913 100644
--- a/Documentation/trace/ftrace.txt
+++ b/Documentation/trace/ftrace.txt
@@ -416,6 +416,12 @@ 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.
@@ -2238,16 +2244,13 @@ hrtimer_interrupt
sys_nanosleep
-Perhaps this is not enough. The filters also allow simple wild
-cards. Only the following are currently available
+Perhaps this is not enough. The filters also allow glob(7) matching.
<match>* - will match functions that begin with <match>
*<match> - will match functions that end with <match>
*<match>* - will match functions that have <match> in it
-
-These are the only wild cards which are supported.
-
- <match>*<match> will not work.
+ <match1>*<match2> - will match functions that begin with
+ <match1> and end with <match2>
Note: It is better to use quotes to enclose the wild cards,
otherwise the shell may expand the parameters into names