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] [5.0% done] [ 17515/  3389 kb/s] [eta 00m:57s]
Threads: 3: [mmm] [9.5% done] [ 18802/  2705 kb/s] [eta 00m:38s]
Threads: 3: [mmm] [14.3% done] [ 12831/  5123 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [19.4% done] [  7139/ 11219 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [25.0% done] [  9881/  8448 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [29.6% done] [ 12071/  5155 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [33.3% done] [ 11728/  2839 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [35.7% done] [ 12800/  3910 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [39.3% done] [  9625/  6084 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [42.9% done] [  9558/  5604 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [44.8% done] [  7723/  4572 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [48.3% done] [  6242/  6616 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [50.0% done] [  8625/  2370 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [53.3% done] [  6738/  4808 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [54.8% done] [  8928/   295 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [56.2% done] [  5513/  3264 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [59.4% done] [  3481/  6313 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=32393, got signal=6
Threads: 2: [_mm] [62.5% done] [  5068/  3308 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=32394, got signal=6
Threads: 1: [__m] [64.7% done] [  6100/  2158 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=32395, got signal=6

fio: (groupid=0): err= 0: pid=32393
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.9%, 2=4.1%, 4=37.7%, 8=57.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.9%, 4=0.1%, 10=0.8%, 20=6.2%, 50=14.2%, 100=35.1%
     lat (msec): 250=40.0%, 500=2.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=32394
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=2.3%, 4=31.1%, 8=66.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.7%, 4=0.1%, 10=0.6%, 20=4.6%, 50=10.9%, 100=35.9%
     lat (msec): 250=43.9%, 500=2.4%, 750=0.6%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=32395
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=3.0%, 4=31.9%, 8=64.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.9%, 4=0.0%, 10=0.0%, 20=5.8%, 50=20.6%, 100=23.7%
     lat (msec): 250=46.7%, 500=1.1%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3390/1926, merge=542/680, ticks=43940/432464, in_queue=170844, util=99.60%
0.28user 0.50system 0:22.84elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2466minor)pagefaults 0swaps