fahad@heffalump:~/fiotest$  sudo fio --filename=$PWD/testfile --direct=1 --sync=1 --rw=read --bs=4k --numjobs=8 --iodepth=32 --runtime=60 --time_based --group_reporting --size=1G --name=journal-test
  journal-test: (g=0): rw=read, bs=4K-4K/4K-4K/4K-4K, ioengine=sync, iodepth=32
  ...
  fio-2.2.10
  Starting 8 processes
  journal-test: Laying out IO file(s) (1 file(s) / 1024MB)
  Jobs: 8 (f=8): [R(8)] [100.0% done] [367.8MB/0KB/0KB /s] [94.2K/0/0 iops] [eta 00m:00s]
  journal-test: (groupid=0, jobs=8): err= 0: pid=25184: Wed Jun  1 17:32:44 2016
    read : io=22265MB, bw=379986KB/s, iops=94996, runt= 60001msec
      clat (usec): min=15, max=19595, avg=83.59, stdev=102.01
       lat (usec): min=15, max=19595, avg=83.65, stdev=102.02
      clat percentiles (usec):
     |  1.00th=[   20],  5.00th=[   65], 10.00th=[   66], 20.00th=[   68],
       | 30.00th=[   75], 40.00th=[   79], 50.00th=[   80], 60.00th=[   82],
       | 70.00th=[   84], 80.00th=[   90], 90.00th=[   97], 95.00th=[  108],
       | 99.00th=[  141], 99.50th=[  173], 99.90th=[  900], 99.95th=[ 1704],
       | 99.99th=[ 4768]
      bw (KB  /s): min=43704, max=53976, per=12.51%, avg=47524.23, stdev=1225.35
      lat (usec) : 20=0.74%, 50=1.42%, 100=89.28%, 250=8.32%, 500=0.09%
      lat (usec) : 750=0.03%, 1000=0.03%
      lat (msec) : 2=0.06%, 4=0.02%, 10=0.01%, 20=0.01%
    cpu          : usr=1.38%, sys=7.92%, ctx=5737418, majf=0, minf=89
    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=5699889/w=0/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=32

  Run status group 0 (all jobs):
     READ: io=22265MB, aggrb=379986KB/s, minb=379986KB/s, maxb=379986KB/s, mint=60001msec, maxt=60001msec