fio: (g=0): rw=randrw, bs=4K-256K/4K-256K, ioengine=posixaio, iodepth=8
...
fio: (g=0): rw=randrw, bs=4K-256K/4K-256K, ioengine=posixaio, iodepth=8
Starting 3 threads
Threads: 3
Threads: 3
Threads: 3: [mmm] [13.0% done] [ 17319/  2912 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [17.4% done] [ 16994/  3953 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [ 18645/  1391 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 15196/  4396 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [  9461/  8594 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 12479/  5202 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [ 10869/  5400 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 13731/  4083 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [  7756/  6963 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [ 14220/  1065 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [ 10987/  2811 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [  9424/  4030 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [ 10934/  2344 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  6788/  3880 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  2904/  5779 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  7927/   650 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=10710, got signal=6
Threads: 2: [mm_] [61.3% done] [  8102/   606 kb/s] [eta 00m:12s]
Threads: 2: [mV_] [62.5% done] [ 14368/   284 kb/s] [eta 00m:12s]
Threads: 1: [m__] [63.6% done] [ 14797/   239 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=10708, got signal=6

fio: (groupid=0): err= 0: pid=10708
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=7.9%, 8=91.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=5.2%, 50=12.4%, 100=28.9%
     lat (msec): 250=50.8%, 500=1.3%, 750=0.4%, 1000=0.4%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=10709
  read : io=100MiB, bw=4,970KiB/s, runt= 20989msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    2, max=  515, avg=74.23, stdev=48.06
    bw (KiB/s) : min=  213, max=20181, per=44.17%, avg=5391.53, stdev=4259.91
  write: io=25,252KiB, bw=1,327KiB/s, runt= 19479msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   13, max=  403, avg=113.03, stdev=41.55
    bw (KiB/s) : min=    0, max= 6682, per=55.12%, avg=2367.00, stdev=2460.81
  cpu          : usr=0.29%, sys=0.36%, ctx=7124
  IO depths    : 1=0.1%, 2=0.3%, 4=13.8%, 8=85.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=2.6%, 20=7.0%, 50=19.0%, 100=35.7%
     lat (msec): 250=34.6%, 500=0.5%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=10710
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.4%, 8=93.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=2.3%, 50=11.4%, 100=50.8%
     lat (msec): 250=35.1%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=244MiB, aggrb=12,205KiB/s, minb=0KiB/s, maxb=4,970KiB/s, mint=0msec, maxt=20989msec
  WRITE: io=81,696KiB, aggrb=4,294KiB/s, minb=0KiB/s, maxb=1,327KiB/s, mint=0msec, maxt=20989msec

Disk stats (read/write):
  cciss!c0d0: ios=4787/1600, merge=817/36, ticks=51676/26792, in_queue=78468, util=98.80%
0.26user 0.36system 0:22.34elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
500464inputs+163424outputs (0major+2439minor)pagefaults 0swaps