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] [8.3% done] [ 10348/  2484 kb/s] [eta 00m:33s]
Threads: 3: [mmm] [10.8% done] [ 10240/  1968 kb/s] [eta 00m:33s]
Threads: 3: [mmm] [13.9% done] [  4312/  8652 kb/s] [eta 00m:31s]
Threads: 3: [mmm] [16.7% done] [  6772/  5500 kb/s] [eta 00m:30s]
Threads: 3: [mmm] [19.4% done] [  6912/  6728 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [21.6% done] [  6428/  3968 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [24.3% done] [  6816/  4268 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [25.6% done] [  7852/  1044 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [28.2% done] [  9500/  1984 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [30.8% done] [  7340/  2368 kb/s] [eta 00m:27s]
Threads: 3: [mmm] [33.3% done] [  6632/  4424 kb/s] [eta 00m:26s]
Threads: 3: [mmm] [35.9% done] [  4036/  6008 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [37.5% done] [  7412/  1332 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [39.0% done] [  5608/  4444 kb/s] [eta 00m:25s]
Threads: 3: [mmm] [42.5% done] [  5088/  4644 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [43.9% done] [  7016/  2196 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [45.2% done] [  4564/  3400 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [47.6% done] [  5828/  1456 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [48.8% done] [  8688/     0 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [51.2% done] [  4772/  2644 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [52.3% done] [  3612/  4288 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [53.3% done] [  4224/  1704 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [55.6% done] [  4212/  2548 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [56.5% done] [  4180/  2820 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [58.7% done] [  3624/  3240 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [59.6% done] [  1956/  4308 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [60.4% done] [  3488/  3376 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [61.2% done] [  4128/  1788 kb/s] [eta 00m:19s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12803, got signal=6
Threads: 2: [_mm] [60.8% done] [  6868/   792 kb/s] [eta 00m:20s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12804, got signal=6
Threads: 1: [__m] [62.7% done] [  6224/   312 kb/s] [eta 00m:19s]
Threads: 1: [__m] [67.3% done] [  6462/     0 kb/s] [eta 00m:16s]
fio: pid=12805, got signal=6

fio: (groupid=0): err= 0: pid=12803
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=1.2%, 4=14.5%, 8=84.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.3%, 4=0.0%, 10=0.5%, 20=1.1%, 50=13.7%, 100=7.5%
     lat (msec): 250=69.5%, 500=6.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12804
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.9%, 4=14.1%, 8=84.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=0.7%, 20=2.4%, 50=17.0%, 100=2.5%
     lat (msec): 250=66.5%, 500=10.1%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12805
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=0.5%, 4=13.7%, 8=85.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.0%, 20=1.3%, 50=18.7%, 100=2.9%
     lat (msec): 250=67.7%, 500=7.7%, 750=0.3%, 1000=0.4%, >=2000=0.4%

Run status group 0 (all jobs):

Disk stats (read/write):
  sda: ios=3701/1760, merge=602/436, ticks=85020/33724, in_queue=118744, util=99.12%
0.12user 0.34system 0:34.27elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2511minor)pagefaults 0swaps