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tracing: add print format to event trace format files

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This patch adds the internal print format used to print the raw events
to the event trace point format file.

 # cat /debug/tracing/events/sched/sched_switch/format
name: sched_switch
ID: 29
format:
        field:unsigned char type;       offset:0;       size:1;
        field:unsigned char flags;      offset:1;       size:1;
        field:unsigned char preempt_count;      offset:2;       size:1;
        field:int pid;  offset:4;       size:4;
        field:int tgid; offset:8;       size:4;

        field:pid_t prev_pid;   offset:12;      size:4;
        field:int prev_prio;    offset:16;      size:4;
        field special:char next_comm[TASK_COMM_LEN];    offset:20;      size:16;
        field:pid_t next_pid;   offset:36;      size:4;
        field:int next_prio;    offset:40;      size:4;

print fmt: "prev %d:%d ==> next %s:%d:%d"

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
This commit is contained in:
Steven Rostedt 2009-03-02 15:22:21 -05:00
parent c5e4e19271
commit 96ccd21cd1
1 changed files with 2 additions and 0 deletions
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2
kernel/trace/trace_events_stage_2.h
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@ -122,6 +122,8 @@ ftrace_format_##call(struct trace_seq *s) \
\
tstruct; \
\
trace_seq_printf(s, "\nprint fmt: \"%s\"\n", tpfmt); \
\
return ret; \
}