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d54a144
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"Expand" random number from 32-bit to 64-bit when necessary
author
Jens Axboe
<jens.axboe@oracle.com>
Thu, 25 Mar 2010 22:12:04 +0000
(23:12 +0100)
committer
Jens Axboe
<jens.axboe@oracle.com>
Thu, 25 Mar 2010 22:12:04 +0000
(23:12 +0100)
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
io_u.c
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diff --git
a/io_u.c
b/io_u.c
index 4d3116b7fd4fc0901f4419e8690270c2c18a2d43..3558a0734711a0c80518d11903b9b9f885e73713 100644
(file)
--- a/
io_u.c
+++ b/
io_u.c
@@
-1218,7
+1218,12
@@
void io_u_fill_buffer(struct thread_data *td, struct io_u *io_u,
if (!td->o.zero_buffers) {
while ((void *) ptr - io_u->buf < max_bs) {
- *ptr = __rand(&__fio_rand_state);
+ unsigned int r = __rand(&__fio_rand_state);
+
+ if (sizeof(r) != sizeof(*ptr))
+ r *= GOLDEN_RATIO_PRIME;
+
+ *ptr = r;
ptr++;
}
} else