[patch 10/12] Fix timer_stats printout of events/sec

Greg KH
2007-10-08T18:38:22Z

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From: Anton Blanchard <anton@samba.org>

commit 74922be1485818ed368c4cf4f0b100f70bf01e08 upstream.

When using /proc/timer_stats on ppc64 I noticed the events/sec field wasnt
accurate. Sometimes the integer part was incorrect due to rounding (we
werent taking the fractional seconds into consideration).

The fraction part is also wrong, we need to pad the printf statement and
take the bottom three digits of 1000 times the value.

Signed-off-by: Anton Blanchard <anton@samba.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

kernel/time/timer_stats.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

--- a/kernel/time/timer_stats.c
+++ b/kernel/time/timer_stats.c
@@ -319,8 +319,9 @@ static int tstats_show(struct seq_file *
ms = 1;

if (events && period.tv_sec)
- seq_printf(m, "%ld total events, %ld.%ld events/sec\n", events,
- events / period.tv_sec, events * 1000 / ms);
+ seq_printf(m, "%ld total events, %ld.%03ld events/sec\n",
+ events, events * 1000 / ms,
+ (events * 1000000 / ms) % 1000);
else
seq_printf(m, "%ld total events\n", events);

--