On 03/12/2015 08:32 AM, Urs Schaltegger wrote:
fio always writes null bytes whatever I do. I need random data to avoid
interference of deduplication solutions (within SSDs or using ZFS).
Windows 8.1 Enterprise x64
fio-2.2.6 (also tried 2.2.0/2.2.1/2.2.3)
fio --section=fiorandom --runtime=60 <FIOFile>
<FIOFile>:
[global]
ioengine=windowsaio
thread
group_reporting
time_based
clocksource=clock_gettime
direct=1
refill_buffers
size=1g
[fiorandom]
readwrite=randwrite
numjobs=4
iodepth=1
blocksize=8k
directory=D\:\
Hmm yes, that looks like a regression. Does the attached work?
--
Jens Axboe
diff --git a/io_u.c b/io_u.c
index 6567e10a5be2..33b8ac347437 100644
--- a/io_u.c
+++ b/io_u.c
@@ -1895,8 +1895,13 @@ void fill_io_buffer(struct thread_data *td, void *buf, unsigned int min_write,
} while (left);
} else if (o->buffer_pattern_bytes)
fill_buffer_pattern(td, buf, max_bs);
- else
+ else if (o->zero_buffers)
memset(buf, 0, max_bs);
+ else {
+ struct frand_state *rs = get_buf_state(td);
+
+ fill_random_buf(rs, buf, max_bs);
+ }
}
/*
