From: "Steven Rostedt (VMware)" <rostedt@xxxxxxxxxxx>
I'm constantly needing to look at the event formats of ftrace events
(like the function event or print event), but trace-cmd list does not
include them, as they can not be enabled by trace-cmd record/start.
By default, trace-cmd list -e, wont show ftrace events, but if a regex
is added to the search: trace-cmd list -e print, then it will now list
those events in ftrace. This is useful for:
# trace-cmd list -e ftrace:function -F
system: ftrace
name: function
ID: 1
format:
field:unsigned short common_type; offset:0; size:2; signed:0;
field:unsigned char common_flags; offset:2; size:1; signed:0;
field:unsigned char common_preempt_count; offset:3; size:1; signed:0;
field:int common_pid; offset:4; size:4; signed:1;
field:unsigned long ip; offset:8; size:8; signed:0;
field:unsigned long parent_ip; offset:16; size:8; signed:0;
Steven Rostedt (VMware) (2):
trace-cmd list: Use tracefs to help find events for -e
trace-cmd list: Add ftrace events to listing of events
lib/trace-cmd/trace-input.c | 6 +-
tracecmd/trace-list.c | 150 ++++++++++++++++++++++++++++++++++--
2 files changed, 149 insertions(+), 7 deletions(-)
--
2.29.2
|