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] [13.6% done] [ 11714/  9579 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [ 16591/  3371 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [21.7% done] [ 14512/  5157 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 12873/  5985 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [29.2% done] [ 11182/  7127 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [  7911/ 10298 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [ 14472/  2635 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 15749/  1415 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [ 15071/  1783 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [ 11002/  2867 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  9837/  4026 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  9009/  3148 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  4872/  6455 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  3372/  6456 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  2245/  7085 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  5865/  3579 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  6711/   931 kb/s] [eta 00m:11s]
Threads: 3: [mVm] [64.5% done] [ 11324/   731 kb/s] [eta 00m:11s]
Threads: 2: [mEm] [65.6% done] [ 10974/   968 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25120, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25122, got signal=6

fio: (groupid=0): err= 0: pid=25120
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.0%, 8=95.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.2%, 50=5.5%, 100=45.3%
     lat (msec): 250=45.5%, 500=1.5%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=25121
  read : io=100MiB, bw=4,979KiB/s, runt= 20988msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    2, max=  194, avg=79.96, stdev=38.19
    bw (KiB/s) : min= 1069, max=15089, per=50.19%, avg=5432.06, stdev=2904.77
  write: io=17,840KiB, bw=933KiB/s, runt= 19563msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   58, max=  211, avg=103.86, stdev=28.46
    bw (KiB/s) : min=    0, max= 5626, per=32.51%, avg=1749.18, stdev=1832.13
  cpu          : usr=0.29%, sys=0.71%, ctx=7090
  IO depths    : 1=0.2%, 2=0.3%, 4=10.4%, 8=89.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.7%, 20=5.8%, 50=13.9%, 100=46.0%
     lat (msec): 250=33.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=25122
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=5.4%, 8=94.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=3.4%, 50=6.7%, 100=43.8%
     lat (msec): 250=44.0%, 500=1.2%, 750=0.3%, 1000=0.4%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=217MiB, aggrb=10,823KiB/s, minb=0KiB/s, maxb=4,979KiB/s, mint=0msec, maxt=20988msec
  WRITE: io=100MiB, aggrb=5,381KiB/s, minb=0KiB/s, maxb=933KiB/s, mint=0msec, maxt=20988msec

Disk stats (read/write):
  cciss!c0d0: ios=4300/2030, merge=887/130, ticks=49084/31692, in_queue=80768, util=98.71%
0.29user 0.42system 0:22.61elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
443792inputs+205656outputs (0major+2445minor)pagefaults 0swaps