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] [11.1% done] [  7509/ 11089 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [15.4% done] [ 11942/  7972 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [20.0% done] [  7866/ 11405 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [24.0% done] [ 14319/  5530 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [29.2% done] [ 10211/  8586 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [32.0% done] [ 13052/  4600 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [  9591/  7069 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [  6735/  9005 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [  9492/  4998 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [  8171/  6842 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [ 11812/  4071 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [ 14559/   459 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  6865/  5003 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  7939/  3400 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  5900/  4128 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [62.1% done] [  6748/  3278 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  2657/  6456 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=18194, got signal=6
Threads: 2: [m_m] [64.5% done] [  5694/  2119 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=18193, got signal=6
Threads: 1: [__m] [67.7% done] [  7581/   284 kb/s] [eta 00m:10s]
Threads: 1: [__V] [81.5% done] [ 21106/     0 kb/s] [eta 00m:05s]
fio: (groupid=0): err= 0: pid=18193
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=6.7%, 8=92.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=0.2%, 20=3.6%, 50=5.3%, 100=45.4%
     lat (msec): 250=44.2%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=18194
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.3%, 4=6.0%, 8=93.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.4%, 20=2.0%, 50=7.2%, 100=42.9%
     lat (msec): 250=46.9%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=18195
  read : io=100MiB, bw=4,595KiB/s, runt= 22756msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  407, avg=72.65, stdev=52.43
    bw (KiB/s) : min=    7, max=23615, per=51.54%, avg=5273.32, stdev=5207.42
  write: io=32,172KiB, bw=1,553KiB/s, runt= 21204msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   56, max=  323, avg=113.67, stdev=32.03
    bw (KiB/s) : min=    0, max= 6902, per=46.21%, avg=2491.20, stdev=2284.87
  cpu          : usr=0.62%, sys=0.37%, ctx=7837
  IO depths    : 1=0.1%, 2=0.9%, 4=14.8%, 8=84.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.4%, 10=4.9%, 20=8.2%, 50=16.4%, 100=33.9%
     lat (msec): 250=35.3%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=222MiB, aggrb=10,231KiB/s, minb=0KiB/s, maxb=4,595KiB/s, mint=22756msec, maxt=22756msec
  WRITE: io=109MiB, aggrb=5,391KiB/s, minb=0KiB/s, maxb=1,553KiB/s, mint=22756msec, maxt=22756msec

Disk stats (read/write):
  cciss!c0d0: ios=4267/2345, merge=806/292, ticks=46436/38176, in_queue=84608, util=99.66%
0.34user 0.52system 0:23.25elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
454784inputs+223320outputs (0major+2451minor)pagefaults 0swaps