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
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19614, got signal=6
Threads: 2
Threads: 2: [m_m] [8.3% done] [  6416/ 60444 kb/s] [eta 00m:33s]
Threads: 2: [F_m] [25.0% done] [   612/ 28436 kb/s] [eta 00m:12s]
Threads: 2: [F_m] [26.3% done] [   744/     0 kb/s] [eta 00m:14s]
Threads: 2: [F_m] [26.1% done] [  1320/     0 kb/s] [eta 00m:17s]
Threads: 2: [F_m] [26.9% done] [  1408/     0 kb/s] [eta 00m:19s]
Threads: 2: [F_m] [53.3% done] [  1180/ 39292 kb/s] [eta 00m:07s]
Threads: 2: [F_F] [100.0% done] [   100/ 20484 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [V_V] [68.2% done] [  3728/     0 kb/s] [eta 00m:07s]
Threads: 2: [V_V] [76.2% done] [ 26846/     0 kb/s] [eta 00m:05s]
Threads: 2: [V_V] [85.0% done] [ 33788/     0 kb/s] [eta 00m:03s]
Threads: 2: [V_V] [94.7% done] [ 31920/     0 kb/s] [eta 00m:01s]
Threads: 2: [V_V] [100.0% done] [ 35056/     0 kb/s] [eta 00m:00s]
Threads: 2: [V_V] [100.0% done] [ 30784/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=19613
  read : io=100MiB, bw=4,958KiB/s, runt= 21147msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  515, avg=37.85, stdev=69.71
    bw (KiB/s) : min=    6, max=26722, per=112.57%, avg=11212.18, stdev=7977.81
  write: io=95,312KiB, bw=6,513KiB/s, runt= 14984msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  245, avg= 1.02, stdev= 9.51
    bw (KiB/s) : min=    0, max=128040, per=263.66%, avg=50198.00, stdev=68349.86
  cpu          : usr=3.54%, sys=1.74%, ctx=7102
  IO depths    : 1=1.5%, 2=55.4%, 4=30.6%, 8=12.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=49.0%, 4=1.0%, 10=20.2%, 20=15.2%, 50=5.0%, 100=2.0%
     lat (msec): 250=6.3%, 500=1.0%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=19614
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=94.8%, 4=3.2%, 8=1.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=95.8%, 4=1.4%, 10=0.5%, 20=0.1%, 50=0.3%, 100=0.1%
     lat (msec): 250=1.2%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=19615
  read : io=100MiB, bw=4,899KiB/s, runt= 21401msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max= 1176, avg=64.93, stdev=130.66
    bw (KiB/s) : min=    1, max=23543, per=69.14%, avg=6886.22, stdev=7086.65
  write: io=84,484KiB, bw=5,770KiB/s, runt= 14992msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  321, avg= 2.46, stdev=23.03
    bw (KiB/s) : min=    0, max=36871, per=76.01%, avg=14472.00, stdev=19672.21
  cpu          : usr=2.93%, sys=2.32%, ctx=7199
  IO depths    : 1=1.0%, 2=50.8%, 4=30.6%, 8=17.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=47.3%, 4=0.5%, 10=13.9%, 20=18.7%, 50=5.6%, 100=1.3%
     lat (msec): 250=9.3%, 500=2.5%, 750=0.3%, 1000=0.3%, >=2000=0.2%

Run status group 0 (all jobs):
   READ: io=203MiB, aggrb=9,960KiB/s, minb=0KiB/s, maxb=4,958KiB/s, mint=21401msec, maxt=21401msec
  WRITE: io=272MiB, aggrb=19,039KiB/s, minb=0KiB/s, maxb=6,513KiB/s, mint=21401msec, maxt=21401msec

Disk stats (read/write):
  sda: ios=2477/2267, merge=1057/67325, ticks=48712/1861492, in_queue=1910884, util=99.02%
2.21user 1.12system 0:21.67elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2480minor)pagefaults 0swaps