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
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=26435, got signal=6
Threads: 2
Threads: 2
Threads: 2: [_mF] [11.1% done] [  1637/   861 kb/s] [eta 00m:24s]
Threads: 2: [_mF] [57.1% done] [  1438/ 61496 kb/s] [eta 00m:03s]
Threads: 2: [_mF] [62.5% done] [   492/ 16835 kb/s] [eta 00m:03s]
Threads: 2: [_mV] [66.7% done] [ 23816/     0 kb/s] [eta 00m:03s]
Threads: 2: [_FV] [100.0% done] [ 17433/  5621 kb/s] [eta 00m:00s]
Threads: 2: [_FV] [100.0% done] [ 20443/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FV] [100.0% done] [ 26243/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FV] [100.0% done] [  3246/     0 kb/s] [eta 00m:00s]
Threads: 1: [_F_] [100.0% done] [  4924/     0 kb/s] [eta 00m:00s]
Threads: 1: [_F_] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [_F_] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [_F_] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [_V_] [88.2% done] [ 27298/     0 kb/s] [eta 00m:02s]
Threads: 1: [_V_] [100.0% done] [ 32117/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=26435
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=97.8%, 4=2.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=99.2%, 4=0.6%, 10=0.0%, 20=0.0%, 50=0.0%, 100=0.0%
     lat (msec): 250=0.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=26436
  read : io=100MiB, bw=6,228KiB/s, runt= 16836msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  827, avg=34.52, stdev=89.08
    bw (KiB/s) : min=   27, max=41607, per=90.59%, avg=11281.00, stdev=15591.48
  write: io=83,468KiB, bw=5,912KiB/s, runt= 14456msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  628, avg= 4.34, stdev=40.56
    bw (KiB/s) : min=    0, max=137420, per=180.13%, avg=35664.00, stdev=67863.35
  cpu          : usr=3.75%, sys=2.26%, ctx=6239
  IO depths    : 1=1.1%, 2=49.6%, 4=30.4%, 8=18.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=46.4%, 4=5.1%, 10=16.3%, 20=22.3%, 50=2.7%, 100=2.3%
     lat (msec): 250=2.5%, 500=1.5%, 750=0.6%, 1000=0.1%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=26437
  read : io=100MiB, bw=9,656KiB/s, runt= 10853msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  314, avg=31.37, stdev=47.87
    bw (KiB/s) : min=   13, max=44670, per=123.43%, avg=15371.15, stdev=15886.43
  write: io=93,684KiB, bw=18,127KiB/s, runt=  5292msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  147, avg= 0.45, stdev= 5.61
    bw (KiB/s) : min=    0, max=137191, per=346.46%, avg=68595.50, stdev=97008.69
  cpu          : usr=6.49%, sys=3.72%, ctx=4680
  IO depths    : 1=0.8%, 2=52.5%, 4=30.9%, 8=15.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=49.0%, 4=3.9%, 10=13.5%, 20=18.6%, 50=5.3%, 100=4.1%
     lat (msec): 250=5.0%, 500=0.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=200MiB, aggrb=12,453KiB/s, minb=0KiB/s, maxb=9,656KiB/s, mint=10853msec, maxt=16836msec
  WRITE: io=273MiB, aggrb=19,799KiB/s, minb=0KiB/s, maxb=18,127KiB/s, mint=10853msec, maxt=16836msec

Disk stats (read/write):
  sda: ios=2096/1626, merge=836/68059, ticks=23944/1797272, in_queue=1829596, util=98.18%
2.19user 1.03system 0:17.19elapsed 18%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2463minor)pagefaults 0swaps