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=28685, got signal=6
Threads: 2
Threads: 2
Threads: 2: [F_m] [60.0% done] [  1128/ 10900 kb/s] [eta 00m:02s]
Threads: 2: [F_m] [57.1% done] [   640/     0 kb/s] [eta 00m:03s]
Threads: 2: [F_m] [55.6% done] [  1188/     0 kb/s] [eta 00m:04s]
Threads: 2: [V_m] [54.5% done] [ 11604/     0 kb/s] [eta 00m:05s]
Threads: 2: [V_m] [63.6% done] [ 30004/ 13484 kb/s] [eta 00m:04s]
Threads: 2: [V_F] [100.0% done] [ 18397/  7759 kb/s] [eta 00m:00s]
Threads: 2: [V_F] [100.0% done] [ 12528/     0 kb/s] [eta 00m:00s]
Threads: 2: [V_F] [100.0% done] [  9400/     0 kb/s] [eta 00m:00s]
Threads: 2: [V_F] [100.0% done] [ 11520/     0 kb/s] [eta 00m:00s]
Threads: 1: [__F] [100.0% done] [  7188/     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] [71.4% done] [  3056/     0 kb/s] [eta 00m:06s]
Threads: 1: [__V] [100.0% done] [ 40524/     0 kb/s] [eta 00m:00s]
Threads: 1: [__V] [100.0% done] [ 41228/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=28684
  read : io=100MiB, bw=8,641KiB/s, runt= 12133msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  227, avg=31.25, stdev=37.71
    bw (KiB/s) : min=    0, max=35913, per=111.44%, avg=13330.33, stdev=10957.50
  write: io=99,296KiB, bw=17,913KiB/s, runt=  5676msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=   87, avg= 0.60, stdev= 3.83
    bw (KiB/s) : min=    0, max=51828, per=134.45%, avg=25914.00, stdev=36647.93
  cpu          : usr=7.29%, sys=3.63%, ctx=3612
  IO depths    : 1=1.6%, 2=54.2%, 4=32.4%, 8=11.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=47.7%, 4=1.8%, 10=17.5%, 20=10.7%, 50=11.9%, 100=5.9%
     lat (msec): 250=4.2%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=28685
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=95.4%, 4=4.1%, 8=0.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=91.9%, 4=5.7%, 10=2.1%, 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=28686
  read : io=100MiB, bw=5,981KiB/s, runt= 17529msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  722, avg=39.98, stdev=105.60
    bw (KiB/s) : min=   27, max=41501, per=86.01%, avg=10288.84, stdev=16613.26
  write: io=86,432KiB, bw=5,783KiB/s, runt= 15303msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  413, avg= 3.23, stdev=28.35
    bw (KiB/s) : min=    0, max=29658, per=60.89%, avg=11736.50, stdev=13418.79
  cpu          : usr=4.06%, sys=2.37%, ctx=5794
  IO depths    : 1=1.2%, 2=51.8%, 4=31.2%, 8=15.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=47.3%, 4=2.2%, 10=20.1%, 20=20.2%, 50=3.4%, 100=2.0%
     lat (msec): 250=1.3%, 500=2.3%, 750=1.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=200MiB, aggrb=11,962KiB/s, minb=0KiB/s, maxb=8,641KiB/s, mint=17529msec, maxt=17529msec
  WRITE: io=281MiB, aggrb=19,274KiB/s, minb=0KiB/s, maxb=17,913KiB/s, mint=17529msec, maxt=17529msec

Disk stats (read/write):
  sda: ios=1968/2006, merge=659/69916, ticks=23612/1982276, in_queue=2007288, util=97.38%
2.59user 1.12system 0:17.84elapsed 20%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2480minor)pagefaults 0swaps