diff options
| author | Steven Rostedt <srostedt@redhat.com> | 2008-11-21 07:51:53 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-11-23 11:40:21 +0100 |
| commit | bac28bfe42ba98ee67503f78984d1d5e1ebbbb78 (patch) | |
| tree | 4187a43a240651919adbd6c0ad334dc10209ca23 /kernel/trace/trace_branch.c | |
| parent | trace: consolidate unlikely and likely profiler (diff) | |
| download | linux-bac28bfe42ba98ee67503f78984d1d5e1ebbbb78.tar.xz linux-bac28bfe42ba98ee67503f78984d1d5e1ebbbb78.zip | |
trace: branch profiling should not print percent without data
Impact: cleanup on output of branch profiler
When a branch has not been taken, it does not make sense to show
a percentage incorrect or hit. This patch changes the behaviour
to print out a 'X' when the branch has not been executed yet.
For example:
correct incorrect % Function File Line
------- --------- - -------- ---- ----
2096 0 0 do_arch_prctl process_64.c 832
0 0 X do_arch_prctl process_64.c 804
2604 0 0 IS_ERR err.h 34
130228 5765 4 __switch_to process_64.c 673
0 0 X enable_TSC process_64.c 448
0 0 X disable_TSC process_64.c 431
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace/trace_branch.c')
| -rw-r--r-- | kernel/trace/trace_branch.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/kernel/trace/trace_branch.c b/kernel/trace/trace_branch.c index 21dedc8b50a4..142acb3b4e00 100644 --- a/kernel/trace/trace_branch.c +++ b/kernel/trace/trace_branch.c @@ -225,7 +225,7 @@ static int t_show(struct seq_file *m, void *v) { struct ftrace_branch_data *p = v; const char *f; - unsigned long percent; + long percent; if (v == (void *)1) { seq_printf(m, " correct incorrect %% " @@ -247,9 +247,13 @@ static int t_show(struct seq_file *m, void *v) percent = p->incorrect * 100; percent /= p->correct + p->incorrect; } else - percent = p->incorrect ? 100 : 0; + percent = p->incorrect ? 100 : -1; - seq_printf(m, "%8lu %8lu %3lu ", p->correct, p->incorrect, percent); + seq_printf(m, "%8lu %8lu ", p->correct, p->incorrect); + if (percent < 0) + seq_printf(m, " X "); + else + seq_printf(m, "%3ld ", percent); seq_printf(m, "%-30.30s %-20.20s %d\n", p->func, f, p->line); return 0; } |