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] [ 14907/  5910 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [16.7% done] [ 20382/   569 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.8% done] [ 19228/  2340 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [ 13650/  5942 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [30.4% done] [ 15973/  3522 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [  5182/ 12275 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [  9798/  7585 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 13637/  2035 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [  9591/  7289 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  4738/  8220 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [ 10278/  3746 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  6300/  5633 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  9459/  2238 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  7065/  3233 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  4653/  4165 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  5954/  3156 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4904, got signal=6
Threads: 2: [_mm] [63.3% done] [  6121/  2045 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4905, got signal=6
Threads: 1: [__m] [64.5% done] [  4307/  2639 kb/s] [eta 00m:11s]
Threads: 1: [__V] [70.0% done] [  8533/  1708 kb/s] [eta 00m:09s]
Threads: 1: [__V] [84.6% done] [ 19129/     0 kb/s] [eta 00m:04s]
fio: (groupid=0): err= 0: pid=4904
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=6.9%, 8=92.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.7%, 20=3.2%, 50=6.3%, 100=48.4%
     lat (msec): 250=41.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4905
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=5.9%, 8=93.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=2.3%, 50=9.6%, 100=46.7%
     lat (msec): 250=40.2%, 500=0.5%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4906
  read : io=100MiB, bw=4,689KiB/s, runt= 22309msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    1, max=  475, avg=69.78, stdev=52.76
    bw (KiB/s) : min=  609, max=20080, per=51.67%, avg=5548.03, stdev=4204.08
  write: io=25,820KiB, bw=1,269KiB/s, runt= 20831msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   20, max=  227, avg=97.33, stdev=40.40
    bw (KiB/s) : min=    0, max= 6067, per=51.31%, avg=2492.31, stdev=2065.12
  cpu          : usr=0.39%, sys=0.43%, ctx=7785
  IO depths    : 1=0.1%, 2=0.7%, 4=15.7%, 8=83.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.8%, 10=4.1%, 20=10.0%, 50=20.0%, 100=33.0%
     lat (msec): 250=31.0%, 500=0.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=228MiB, aggrb=10,738KiB/s, minb=0KiB/s, maxb=4,689KiB/s, mint=22309msec, maxt=22309msec
  WRITE: io=98,812KiB, aggrb=4,857KiB/s, minb=0KiB/s, maxb=1,269KiB/s, mint=22309msec, maxt=22309msec

Disk stats (read/write):
  cciss!c0d0: ios=4255/1984, merge=702/106, ticks=44360/28792, in_queue=73144, util=99.10%
0.26user 0.44system 0:22.62elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
468080inputs+197664outputs (0major+2447minor)pagefaults 0swaps