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] [12.5% done] [ 13540/  7020 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [16.0% done] [  8326/ 12353 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [20.0% done] [ 14553/  6186 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [25.0% done] [  5015/ 13532 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [28.0% done] [ 10665/  6845 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [32.0% done] [ 10835/  6308 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [ 14557/  2672 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [  9989/  6963 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [  9334/  5800 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [  7988/  7508 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [ 10482/  1761 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.9% done] [ 12373/  1163 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [ 10624/  1724 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  7712/  2428 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  4360/  5356 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  6365/  2810 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=31522, got signal=6
Threads: 2: [_mm] [63.3% done] [  7077/  1236 kb/s] [eta 00m:11s]
Threads: 2: [_mm] [64.5% done] [  2416/  4661 kb/s] [eta 00m:11s]
Threads: 2: [_Vm] [65.6% done] [ 20227/  1354 kb/s] [eta 00m:11s]
Threads: 1: [_Em] [64.7% done] [ 25710/   280 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=31524, got signal=6

fio: (groupid=0): err= 0: pid=31522
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.1%, 8=94.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.3%, 50=9.8%, 100=50.4%
     lat (msec): 250=37.8%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=31523
  read : io=99MiB, bw=4,701KiB/s, runt= 22181msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  547, avg=61.21, stdev=51.96
    bw (KiB/s) : min=  369, max=30308, per=54.93%, avg=5960.82, stdev=7487.52
  write: io=43,724KiB, bw=2,195KiB/s, runt= 20391msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   27, max=  236, avg=103.61, stdev=37.58
    bw (KiB/s) : min=    0, max= 6826, per=56.80%, avg=3279.95, stdev=2439.62
  cpu          : usr=0.34%, sys=0.65%, ctx=7782
  IO depths    : 1=0.1%, 2=1.5%, 4=18.9%, 8=79.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.5%, 4=0.7%, 10=8.2%, 20=9.6%, 50=19.1%, 100=30.2%
     lat (msec): 250=30.9%, 500=0.3%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=31524
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.2%, 8=95.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.2%, 50=9.9%, 100=35.5%
     lat (msec): 250=49.9%, 500=2.1%, 750=0.9%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=230MiB, aggrb=10,851KiB/s, minb=0KiB/s, maxb=4,701KiB/s, mint=0msec, maxt=22181msec
  WRITE: io=112MiB, aggrb=5,775KiB/s, minb=0KiB/s, maxb=2,195KiB/s, mint=0msec, maxt=22181msec

Disk stats (read/write):
  cciss!c0d0: ios=4599/2209, merge=807/58, ticks=46408/37360, in_queue=83764, util=99.26%
0.23user 0.44system 0:22.95elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
470288inputs+230048outputs (0major+2444minor)pagefaults 0swaps