# fio --filename=/dev/sdb --direct=1 --sync=1 --rw=write --bs=4k --numjobs=1 --iodepth=1 --runtime=60 --time_based --group_reporting --name=journal-test
journal-test: (g=0): rw=write, bs=4K-4K/4K-4K/4K-4K, ioengine=sync, iodepth=1
fio-2.2.8
Starting 1 process
Jobs: 1 (f=1): [W(1)] [100.0% done] [0KB/31848KB/0KB /s] [0/7962/0 iops] [eta 00m:00s]
journal-test: (groupid=0, jobs=1): err= 0: pid=6818: Fri Mar 23 11:12:37 2018
  write: io=1941.6MB, bw=33135KB/s, iops=8283, runt= 60001msec
    clat (usec): min=55, max=3305, avg=118.57, stdev=10.55
     lat (usec): min=56, max=3305, avg=119.03, stdev=10.57
    clat percentiles (usec):
     |  1.00th=[  100],  5.00th=[  101], 10.00th=[  105], 20.00th=[  110],
     | 30.00th=[  115], 40.00th=[  117], 50.00th=[  119], 60.00th=[  122],
     | 70.00th=[  124], 80.00th=[  126], 90.00th=[  129], 95.00th=[  131],
     | 99.00th=[  137], 99.50th=[  139], 99.90th=[  153], 99.95th=[  157],
     | 99.99th=[  229]
    bw (KB  /s): min=31520, max=36232, per=100.00%, avg=33150.72, stdev=1923.38
    lat (usec) : 100=0.66%, 250=99.34%, 500=0.01%, 1000=0.01%
    lat (msec) : 4=0.01%
  cpu          : usr=2.70%, sys=12.48%, ctx=994092, majf=0, minf=31
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued    : total=r=0/w=497037/d=0, short=r=0/w=0/d=0, drop=r=0/w=0/d=0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
  WRITE: io=1941.6MB, aggrb=33135KB/s, minb=33135KB/s, maxb=33135KB/s, mint=60001msec, maxt=60001msec

Disk stats (read/write):
  sdb: ios=43/993290, merge=0/0, ticks=8/46322, in_queue=46107, util=76.84%