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] [ 16062/  6030 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [16.7% done] [ 14356/  5363 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.0% done] [ 10961/  6613 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [24.0% done] [ 12397/  5632 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [28.0% done] [  5254/ 12539 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [32.0% done] [  7931/  9142 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [34.6% done] [  8513/  7378 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [40.0% done] [ 11719/  5120 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [ 15396/  1414 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [ 11609/  3734 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  5977/  6485 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [ 11239/  1666 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  9923/  1548 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  7602/  3498 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  5928/  4258 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [62.1% done] [  7200/  2344 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  7102/  2113 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26723, got signal=6
Threads: 2: [m_m] [64.5% done] [  5087/  2336 kb/s] [eta 00m:11s]
Threads: 2: [m_V] [65.6% done] [ 10256/  1706 kb/s] [eta 00m:11s]
Threads: 2: [m_V] [64.7% done] [ 23816/   174 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26722, got signal=6

fio: (groupid=0): err= 0: pid=26722
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.3%, 4=6.9%, 8=92.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.3%, 20=1.5%, 50=8.4%, 100=45.6%
     lat (msec): 250=41.8%, 500=1.2%, 750=0.6%, 1000=0.2%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=26723
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.1%, 8=93.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.4%, 50=8.1%, 100=45.6%
     lat (msec): 250=44.3%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=26724
  read : io=99MiB, bw=4,638KiB/s, runt= 22469msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    1, max=  192, avg=70.36, stdev=41.84
    bw (KiB/s) : min=  190, max=26672, per=49.39%, avg=5524.53, stdev=6299.57
  write: io=37,068KiB, bw=1,823KiB/s, runt= 20812msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    7, max=  419, avg=120.94, stdev=48.93
    bw (KiB/s) : min=    0, max= 6418, per=59.77%, avg=2885.75, stdev=2385.21
  cpu          : usr=0.32%, sys=0.55%, ctx=7668
  IO depths    : 1=0.1%, 2=0.8%, 4=14.7%, 8=84.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.4%, 10=4.4%, 20=5.9%, 50=17.7%, 100=35.0%
     lat (msec): 250=35.6%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=240MiB, aggrb=11,185KiB/s, minb=0KiB/s, maxb=4,638KiB/s, mint=22469msec, maxt=22469msec
  WRITE: io=98,132KiB, aggrb=4,828KiB/s, minb=0KiB/s, maxb=1,823KiB/s, mint=22469msec, maxt=22469msec

Disk stats (read/write):
  cciss!c0d0: ios=4668/2063, merge=749/176, ticks=51520/31816, in_queue=83332, util=98.85%
0.34user 0.36system 0:23.34elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
490928inputs+196296outputs (0major+2440minor)pagefaults 0swaps