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] [ 18984/  3397 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [19.0% done] [ 18206/  3274 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [22.7% done] [ 15456/  4653 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [27.3% done] [  9554/ 10156 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [31.8% done] [ 11344/  7289 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [34.8% done] [  8285/  8688 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [ 16615/  1147 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 16575/     0 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [ 11694/  3840 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  9814/  4624 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [ 12767/  1883 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  5775/  5649 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  3241/  7427 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  7293/  2696 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  4864/  4421 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  5946/  3733 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25222, got signal=6
Threads: 2: [m_m] [63.3% done] [  2978/  4087 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25221, got signal=6
Threads: 1: [__m] [66.7% done] [  6874/  1195 kb/s] [eta 00m:10s]
Threads: 1: [__V] [75.0% done] [ 15594/     0 kb/s] [eta 00m:07s]
fio: (groupid=0): err= 0: pid=25221
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=5.7%, 8=93.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=0.2%, 20=1.3%, 50=8.1%, 100=49.7%
     lat (msec): 250=39.8%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=25222
  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=0.0%, 20=0.3%, 50=9.1%, 100=53.7%
     lat (msec): 250=36.4%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=25223
  read : io=100MiB, bw=4,704KiB/s, runt= 22213msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    1, max=  547, avg=77.89, stdev=60.28
    bw (KiB/s) : min=   99, max=22063, per=48.62%, avg=5409.97, stdev=5056.02
  write: io=31,260KiB, bw=1,550KiB/s, runt= 20651msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   17, max=  228, avg=114.70, stdev=27.06
    bw (KiB/s) : min=    0, max= 7539, per=54.62%, avg=2615.68, stdev=2467.60
  cpu          : usr=0.23%, sys=0.36%, ctx=7462
  IO depths    : 1=0.1%, 2=0.3%, 4=12.4%, 8=87.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.5%, 10=2.4%, 20=5.8%, 50=22.3%, 100=27.2%
     lat (msec): 250=40.4%, 500=0.5%, 750=0.3%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=236MiB, aggrb=11,127KiB/s, minb=0KiB/s, maxb=4,704KiB/s, mint=22213msec, maxt=22213msec
  WRITE: io=96,588KiB, aggrb=4,789KiB/s, minb=0KiB/s, maxb=1,550KiB/s, mint=22213msec, maxt=22213msec

Disk stats (read/write):
  cciss!c0d0: ios=4451/2128, merge=958/266, ticks=50016/29476, in_queue=79480, util=99.04%
0.20user 0.37system 0:22.52elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
482984inputs+193288outputs (0major+2446minor)pagefaults 0swaps