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] [6.5% done] [  7512/ 12128 kb/s] [eta 00m:43s]
Threads: 3: [mmm] [11.8% done] [ 10414/ 11226 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [16.1% done] [ 16768/  2992 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [20.0% done] [  6017/ 12896 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [24.1% done] [ 15208/  2632 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [27.6% done] [ 11812/  6844 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [31.0% done] [ 11583/  4372 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [35.7% done] [ 13476/  3772 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [37.9% done] [  7703/  7327 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [41.4% done] [  6978/  8640 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [44.8% done] [  6053/  8668 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [48.3% done] [  7191/  5084 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [51.7% done] [ 11315/  2254 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.3% done] [ 10482/  2366 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [56.7% done] [ 11411/  1293 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.1% done] [  4708/  4708 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [61.3% done] [ 10786/     0 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [62.5% done] [  5400/  3852 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [63.6% done] [  3383/  3151 kb/s] [eta 00m:12s]
Threads: 3: [mVm] [64.7% done] [ 20900/   388 kb/s] [eta 00m:12s]
Threads: 2: [mEm] [63.9% done] [ 17320/   108 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=6805, got signal=6
Threads: 1: [__m] [66.7% done] [  5337/  1657 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=6807, got signal=6

fio: (groupid=0): err= 0: pid=6805
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=5.4%, 8=94.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.6%, 50=8.6%, 100=39.4%
     lat (msec): 250=46.1%, 500=2.5%, 750=1.2%, 1000=0.4%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=6806
  read : io=99MiB, bw=4,461KiB/s, runt= 23365msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  877, avg=74.21, stdev=71.45
    bw (KiB/s) : min=    4, max=21433, per=48.94%, avg=4916.11, stdev=5443.57
  write: io=35,596KiB, bw=1,700KiB/s, runt= 21439msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   30, max=  400, avg=102.15, stdev=43.80
    bw (KiB/s) : min=    0, max= 6929, per=48.82%, avg=2633.40, stdev=2448.39
  cpu          : usr=0.96%, sys=0.94%, ctx=5445
  IO depths    : 1=0.5%, 2=3.4%, 4=24.8%, 8=71.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.3%, 4=0.0%, 10=7.4%, 20=4.9%, 50=17.6%, 100=38.5%
     lat (msec): 250=29.4%, 500=0.8%, 750=0.4%, 1000=0.1%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=6807
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=12.7%, 8=87.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=1.0%, 50=9.6%, 100=32.4%
     lat (msec): 250=52.5%, 500=2.1%, 750=0.4%, 1000=0.9%, >=2000=0.4%

Run status group 0 (all jobs):
   READ: io=224MiB, aggrb=10,046KiB/s, minb=0KiB/s, maxb=4,461KiB/s, mint=0msec, maxt=23365msec
  WRITE: io=110MiB, aggrb=5,394KiB/s, minb=0KiB/s, maxb=1,700KiB/s, mint=0msec, maxt=23365msec

Disk stats (read/write):
  cciss!c0d0: ios=4489/3185, merge=576/5723, ticks=56904/329228, in_queue=363724, util=98.82%
0.41user 0.91system 0:25.32elapsed 5%CPU (0avgtext+0avgdata 0maxresident)k
458480inputs+225912outputs (0major+2454minor)pagefaults 0swaps