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] [14.3% done] [ 17992/  3048 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [18.2% done] [ 17268/  3748 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [ 10176/  7860 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [27.3% done] [  5816/ 11780 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [30.4% done] [ 15360/  2400 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 13816/  3144 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [ 12594/  5207 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [41.7% done] [ 16852/   436 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [  7661/  7003 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  9136/  5036 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [ 11612/  3832 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  8076/  2376 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [ 11520/   728 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  5490/  3661 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  8396/  1116 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  8423/  1263 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28753, got signal=6
Threads: 2: [m_m] [63.3% done] [  4548/  2532 kb/s] [eta 00m:11s]
Threads: 2: [m_m] [64.5% done] [  5040/  2468 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28752, got signal=6
Threads: 1: [__V] [72.4% done] [ 10508/   280 kb/s] [eta 00m:08s]
fio: (groupid=0): err= 0: pid=28752
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=15.8%, 8=83.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.9%, 50=10.5%, 100=42.3%
     lat (msec): 250=45.3%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=28753
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=17.1%, 8=82.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=1.4%, 50=11.6%, 100=43.5%
     lat (msec): 250=42.9%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=28754
  read : io=100MiB, bw=4,640KiB/s, runt= 22555msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    6, max=  407, avg=78.54, stdev=52.38
    bw (KiB/s) : min=  107, max=21383, per=44.38%, avg=5292.46, stdev=4112.57
  write: io=23,760KiB, bw=1,153KiB/s, runt= 21100msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   35, max=  223, avg=106.36, stdev=33.50
    bw (KiB/s) : min=    0, max= 7364, per=81.06%, avg=2674.19, stdev=2529.24
  cpu          : usr=0.41%, sys=0.51%, ctx=4751
  IO depths    : 1=0.9%, 2=2.1%, 4=23.4%, 8=73.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=5.9%, 20=4.2%, 50=17.1%, 100=32.9%
     lat (msec): 250=38.7%, 500=0.8%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=257MiB, aggrb=11,926KiB/s, minb=0KiB/s, maxb=4,640KiB/s, mint=22555msec, maxt=22555msec
  WRITE: io=67,980KiB, aggrb=3,299KiB/s, minb=0KiB/s, maxb=1,153KiB/s, mint=22555msec, maxt=22555msec

Disk stats (read/write):
  cciss!c0d0: ios=4951/1500, merge=824/112, ticks=55648/21132, in_queue=76780, util=98.52%
0.36user 0.34system 0:22.90elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
525592inputs+136040outputs (0major+2419minor)pagefaults 0swaps