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=12505, got signal=6
Threads: 2
Threads: 2: [m_F] [75.0% done] [   168/     0 kb/s] [eta 00m:01s]
Threads: 2: [m_F] [66.7% done] [   140/     0 kb/s] [eta 00m:02s]
Threads: 2: [F_F] [100.0% done] [   488/  7980 kb/s] [eta 00m:00s]
Threads: 2: [F_V] [75.0% done] [  1224/     0 kb/s] [eta 00m:02s]
Threads: 2: [F_V] [77.8% done] [ 14208/     0 kb/s] [eta 00m:02s]
Threads: 2: [F_V] [88.9% done] [ 15484/     0 kb/s] [eta 00m:01s]
Threads: 2: [F_V] [100.0% done] [  8876/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_V] [100.0% done] [ 10860/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_V] [100.0% done] [  8716/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_V] [100.0% done] [ 18872/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_V] [100.0% done] [ 10504/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_V] [100.0% done] [  8104/     0 kb/s] [eta 00m:00s]
Threads: 1: [F__] [100.0% done] [  1036/     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__] [86.4% done] [ 26028/     0 kb/s] [eta 00m:03s]
Threads: 1: [V__] [100.0% done] [ 38293/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=12504
  read : io=100MiB, bw=4,899KiB/s, runt= 21402msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max= 1380, avg=31.39, stdev=122.73
    bw (KiB/s) : min=    2, max=38757, per=146.41%, avg=14522.54, stdev=17275.59
  write: io=94,952KiB, bw=5,226KiB/s, runt= 18604msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  299, avg= 1.09, stdev=11.50
    bw (KiB/s) : min=    0, max=76800, per=190.36%, avg=30662.00, stdev=40671.73
  cpu          : usr=4.54%, sys=1.89%, ctx=7481
  IO depths    : 1=4.3%, 2=53.2%, 4=30.1%, 8=12.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=47.7%, 4=2.2%, 10=22.4%, 20=17.8%, 50=6.3%, 100=1.0%
     lat (msec): 250=1.6%, 500=0.2%, 750=0.2%, 1000=0.2%, >=2000=0.3%
fio: (groupid=0): err= 0: pid=12505
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=94.6%, 4=3.2%, 8=2.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=94.0%, 4=2.7%, 10=0.4%, 20=0.1%, 50=0.2%, 100=0.9%
     lat (msec): 250=1.5%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12506
  read : io=100MiB, bw=7,157KiB/s, runt= 14649msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  246, avg=42.70, stdev=50.39
    bw (KiB/s) : min=   13, max=28533, per=109.24%, avg=10835.61, stdev=6463.97
  write: io=97,888KiB, bw=17,093KiB/s, runt=  5864msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  107, avg= 0.57, stdev= 4.70
    bw (KiB/s) : min=    0, max=134537, per=417.64%, avg=67268.50, stdev=95132.03
  cpu          : usr=5.32%, sys=3.14%, ctx=5490
  IO depths    : 1=2.7%, 2=50.9%, 4=32.8%, 8=13.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=48.7%, 4=0.1%, 10=13.4%, 20=12.4%, 50=10.1%, 100=8.4%
     lat (msec): 250=6.7%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=202MiB, aggrb=9,919KiB/s, minb=0KiB/s, maxb=7,157KiB/s, mint=14649msec, maxt=21402msec
  WRITE: io=286MiB, aggrb=16,107KiB/s, minb=0KiB/s, maxb=17,093KiB/s, mint=14649msec, maxt=21402msec

Disk stats (read/write):
  sda: ios=2214/2298, merge=858/70685, ticks=41180/2389628, in_queue=2432504, util=97.07%
2.77user 1.13system 0:21.99elapsed 17%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2481minor)pagefaults 0swaps