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] [7.3% done] [ 13056/  3246 kb/s] [eta 00m:38s]
Threads: 3: [mmm] [10.3% done] [ 15364/   768 kb/s] [eta 00m:35s]
Threads: 3: [mmm] [11.6% done] [ 11580/  2547 kb/s] [eta 00m:38s]
Threads: 3: [mmm] [12.0% done] [  4908/  9687 kb/s] [eta 00m:44s]
Threads: 3: [mmm] [14.3% done] [ 10288/  3571 kb/s] [eta 00m:42s]
Threads: 3: [mmm] [17.0% done] [ 11133/  3035 kb/s] [eta 00m:39s]
Threads: 3: [mmm] [20.9% done] [  5404/  7956 kb/s] [eta 00m:34s]
Threads: 3: [mmm] [23.3% done] [  7159/  4969 kb/s] [eta 00m:33s]
Threads: 3: [mmm] [26.2% done] [ 11264/   459 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [30.0% done] [  6912/  5912 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [31.7% done] [  6395/  6058 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [34.1% done] [   150/ 13337 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [37.5% done] [  7338/  3539 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [39.0% done] [  4965/  5302 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [41.5% done] [  6233/  3986 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [43.9% done] [  4961/  5339 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [46.3% done] [  5006/  3210 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [46.5% done] [  3502/  5282 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [47.7% done] [  3900/  4352 kb/s] [eta 00m:23s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25761, got signal=6
Threads: 2: [m_m] [48.9% done] [  3722/  4136 kb/s] [eta 00m:23s]
Threads: 2: [m_m] [51.1% done] [  5652/  1036 kb/s] [eta 00m:22s]
Threads: 2: [m_m] [53.3% done] [  1377/  6940 kb/s] [eta 00m:21s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25762, got signal=6
Threads: 1: [m__] [56.8% done] [  4136/  2840 kb/s] [eta 00m:19s]
Threads: 1: [m__] [61.9% done] [  4108/  4815 kb/s] [eta 00m:16s]
Threads: 1: [m__] [67.5% done] [  2490/  4762 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=25760, got signal=6

fio: (groupid=0): err= 0: pid=25760
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=2.7%, 4=29.9%, 8=66.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.3%, 4=1.0%, 10=1.6%, 20=6.6%, 50=30.9%, 100=16.3%
     lat (msec): 250=27.3%, 500=12.5%, 750=1.0%, 1000=0.1%, >=2000=0.9%
fio: (groupid=0): err= 0: pid=25761
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=2.7%, 4=34.9%, 8=61.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.6%, 4=0.6%, 10=1.7%, 20=5.0%, 50=18.5%, 100=22.8%
     lat (msec): 250=47.4%, 500=2.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=25762
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=1.5%, 4=24.7%, 8=73.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.3%, 4=0.7%, 10=1.3%, 20=4.0%, 50=12.6%, 100=27.1%
     lat (msec): 250=50.8%, 500=2.2%, 750=0.7%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3215/2616, merge=474/181, ticks=56892/56868, in_queue=113756, util=98.77%
0.18user 0.47system 0:27.73elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2501minor)pagefaults 0swaps