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] [13.6% done] [ 16056/  4036 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [17.4% done] [  7736/ 12100 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [  8168/ 11664 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [  7536/ 10284 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [29.2% done] [ 11068/  6368 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [  9876/  7592 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [36.0% done] [  8456/  8040 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [  8088/  8208 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [  7008/  7708 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [  5988/  9528 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [  6984/  5752 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.9% done] [  6344/  5808 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  4876/  6060 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  5228/  5908 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  4524/  5796 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  5348/  3808 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22573, got signal=6
Threads: 2: [mm_] [63.3% done] [  4256/  4160 kb/s] [eta 00m:11s]
Threads: 2: [mm_] [66.7% done] [  3008/  5476 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=22571, got signal=6
Threads: 1: [_V_] [72.4% done] [  8548/  2000 kb/s] [eta 00m:08s]
Threads: 1: [_V_] [84.6% done] [ 21540/     0 kb/s] [eta 00m:04s]
fio: (groupid=0): err= 0: pid=22571
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=3.4%, 4=34.6%, 8=61.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.9%, 4=0.4%, 10=1.4%, 20=4.3%, 50=18.9%, 100=24.9%
     lat (msec): 250=44.8%, 500=3.4%, 750=0.3%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22572
  read : io=100MiB, bw=4,489KiB/s, runt= 23282msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  671, avg=71.40, stdev=66.68
    bw (KiB/s) : min=   26, max=23852, per=57.22%, avg=5000.18, stdev=6105.20
  write: io=43,688KiB, bw=2,147KiB/s, runt= 20832msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  528, avg=81.52, stdev=69.26
    bw (KiB/s) : min=    0, max= 9232, per=39.85%, avg=2973.94, stdev=2897.06
  cpu          : usr=0.43%, sys=0.58%, ctx=5393
  IO depths    : 1=1.1%, 2=5.4%, 4=40.6%, 8=53.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=1.0%, 4=0.0%, 10=6.4%, 20=12.5%, 50=24.8%, 100=24.9%
     lat (msec): 250=28.7%, 500=1.0%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=22573
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=4.0%, 4=40.4%, 8=55.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.7%, 4=0.4%, 10=1.8%, 20=4.2%, 50=23.4%, 100=30.7%
     lat (msec): 250=38.2%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=194MiB, aggrb=8,738KiB/s, minb=0KiB/s, maxb=4,489KiB/s, mint=0msec, maxt=23282msec
  WRITE: io=148MiB, aggrb=7,462KiB/s, minb=0KiB/s, maxb=2,147KiB/s, mint=0msec, maxt=23282msec

Disk stats (read/write):
  sda: ios=3315/2740, merge=574/432, ticks=38852/39172, in_queue=78024, util=98.73%
0.36user 0.51system 0:23.65elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2480minor)pagefaults 0swaps