| commit | 687040842bf56502d33b6c0cb5d2af6da27d080c | [log] [tgz] |
|---|---|---|
| author | Jens Axboe <jens.axboe@oracle.com> | Wed Jan 10 19:56:37 2007 +0100 |
| committer | Jens Axboe <jens.axboe@oracle.com> | Wed Jan 10 19:56:37 2007 +0100 |
| tree | c35b8f056b2fe5633334c231ceec58d63db8185a | |
| parent | cda866caa9b9f6598e264d24a8997d24f3c2b1c7 [diff] [blame] |
[PATCH] Implement a better mean and standard deviation calculation Based on Knuth's, volume 2. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/fio.h b/fio.h index 2f41eda..e85d6cc 100644 --- a/fio.h +++ b/fio.h
@@ -25,11 +25,12 @@ }; struct io_stat { - unsigned long long val; - unsigned long long val_sq; unsigned long max_val; unsigned long min_val; unsigned long samples; + + double mean; + double S; }; struct io_sample {