From: Andrey Kuzmin <andrey.v.kuzmin@gmail.com>
Date: Mon, 7 Mar 2016 21:40:25 +0000 (-0700)
Subject: io_u: speed up __get_next_buflen()
X-Git-Tag: fio-2.7~6
X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=1ec4db15283551fc135b40dbd8abc07d4f67743e

io_u: speed up __get_next_buflen()

Change the divide-by-100 into a multiplier instead.

Signed-off-by: Jens Axboe <axboe@fb.com>
---

diff --git a/io_u.c b/io_u.c
index 0a398869..3299f290 100644
--- a/io_u.c
+++ b/io_u.c
@@ -553,7 +553,7 @@ static unsigned int __get_next_buflen(struct thread_data *td, struct io_u *io_u,
 
 				buflen = bsp->bs;
 				perc += bsp->perc;
-				if ((r <= ((frand_max / 100L) * perc)) &&
+				if ((r * 100UL <= frand_max * perc) &&
 				    io_u_fits(td, io_u, buflen))
 					break;
 			}