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] [15.0% done] [ 18854/  3328 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [19.0% done] [  9626/ 12633 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [23.8% done] [  9069/ 10370 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [27.3% done] [ 12775/  7643 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [30.4% done] [  9244/ 10000 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [  9707/  8139 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [  5875/ 11430 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [41.7% done] [  9589/  5562 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [ 10979/  4404 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [ 13161/  2629 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [ 10707/  3275 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  8009/  3531 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  8232/  4295 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  5453/  3990 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  6985/  2990 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  6936/  1076 kb/s] [eta 00m:11s]
Threads: 3: [mmV] [63.3% done] [ 22109/   495 kb/s] [eta 00m:11s]
Threads: 2: [mm_] [62.5% done] [ 20809/   260 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=5400, got signal=6
Threads: 1: [m__] [65.6% done] [  8423/     0 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=5399, got signal=6

fio: (groupid=0): err= 0: pid=5399
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=7.7%, 8=92.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.1%, 20=0.7%, 50=15.4%, 100=42.5%
     lat (msec): 250=38.4%, 500=1.6%, 750=0.3%, 1000=0.5%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=5400
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=7.5%, 8=92.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.5%, 20=2.2%, 50=9.0%, 100=45.3%
     lat (msec): 250=40.8%, 500=1.2%, 750=0.3%, 1000=0.4%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=5401
  read : io=100MiB, bw=5,189KiB/s, runt= 20158msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    1, max=  156, avg=59.96, stdev=37.80
    bw (KiB/s) : min=   15, max=25960, per=55.55%, avg=6525.15, stdev=6341.72
  write: io=40,924KiB, bw=2,312KiB/s, runt= 18120msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   15, max=  180, avg=102.80, stdev=21.42
    bw (KiB/s) : min=    0, max= 8020, per=56.31%, avg=3710.47, stdev=2984.90
  cpu          : usr=1.57%, sys=0.62%, ctx=7095
  IO depths    : 1=0.1%, 2=1.5%, 4=18.4%, 8=80.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=1.1%, 10=5.3%, 20=6.9%, 50=17.7%, 100=42.2%
     lat (msec): 250=26.1%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=226MiB, aggrb=11,746KiB/s, minb=0KiB/s, maxb=5,189KiB/s, mint=20158msec, maxt=20158msec
  WRITE: io=114MiB, aggrb=6,589KiB/s, minb=0KiB/s, maxb=2,312KiB/s, mint=20158msec, maxt=20158msec

Disk stats (read/write):
  cciss!c0d0: ios=4122/2185, merge=711/132, ticks=42396/32476, in_queue=74872, util=98.94%
0.68user 0.38system 0:22.18elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
462792inputs+233232outputs (0major+2442minor)pagefaults 0swaps