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] [14.3% done] [ 14016/  6333 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [18.2% done] [ 17566/  3982 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [ 16733/  3441 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [27.3% done] [ 15688/  3461 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [31.8% done] [ 10203/  7123 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [34.8% done] [ 14272/  3546 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [ 17445/     0 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [41.7% done] [ 11910/  3892 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [ 10388/  4421 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  9090/  4759 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  3246/  9370 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  9753/  3412 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  5312/  5808 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  5258/  5201 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  8139/  1976 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  5901/  3221 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  7415/  1224 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=8463, got signal=6
Threads: 2: [mm_] [64.5% done] [  4376/  2749 kb/s] [eta 00m:11s]
Threads: 2: [mV_] [65.6% done] [ 13889/  1243 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=8461, got signal=6
Threads: 1: [_V_] [84.6% done] [ 17818/     0 kb/s] [eta 00m:04s]
fio: (groupid=0): err= 0: pid=8461
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.6%, 8=95.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=1.2%, 50=6.2%, 100=44.4%
     lat (msec): 250=45.9%, 500=1.4%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=8462
  read : io=100MiB, bw=4,584KiB/s, runt= 22768msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  327, avg=66.60, stdev=51.51
    bw (KiB/s) : min=  179, max=21520, per=49.93%, avg=5750.57, stdev=5172.03
  write: io=37,720KiB, bw=1,864KiB/s, runt= 20719msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   19, max=  212, avg=92.54, stdev=36.87
    bw (KiB/s) : min=    0, max= 7471, per=65.69%, avg=2864.95, stdev=2493.88
  cpu          : usr=0.32%, sys=0.51%, ctx=7959
  IO depths    : 1=0.2%, 2=1.2%, 4=20.5%, 8=78.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.3%, 4=1.6%, 10=8.9%, 20=10.1%, 50=13.8%, 100=32.5%
     lat (msec): 250=31.9%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=8463
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.6%, 4=6.4%, 8=92.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.4%, 10=0.2%, 20=1.7%, 50=8.0%, 100=45.6%
     lat (msec): 250=43.7%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=250MiB, aggrb=11,518KiB/s, minb=0KiB/s, maxb=4,584KiB/s, mint=0msec, maxt=22768msec
  WRITE: io=88,256KiB, aggrb=4,361KiB/s, minb=0KiB/s, maxb=1,864KiB/s, mint=0msec, maxt=22768msec

Disk stats (read/write):
  cciss!c0d0: ios=4931/1977, merge=655/35, ticks=53492/28456, in_queue=81940, util=99.14%
0.24user 0.56system 0:23.28elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
512368inputs+176544outputs (0major+2448minor)pagefaults 0swaps