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] [5.0% done] [ 13164/  7488 kb/s] [eta 00m:57s]
Threads: 3: [mmm] [6.7% done] [  7876/  9308 kb/s] [eta 00m:56s]
Threads: 3: [mmm] [8.3% done] [  7824/  6688 kb/s] [eta 00m:55s]
Threads: 3: [mmm] [10.0% done] [  6588/ 10020 kb/s] [eta 00m:54s]
Threads: 3: [mmm] [11.7% done] [ 11172/  4556 kb/s] [eta 00m:53s]
Threads: 3: [mmm] [13.3% done] [  8240/  8024 kb/s] [eta 00m:52s]
Threads: 3: [mmm] [15.0% done] [ 10552/  3488 kb/s] [eta 00m:51s]
Threads: 3: [mmm] [16.7% done] [ 11100/  3904 kb/s] [eta 00m:50s]
Threads: 3: [mmm] [19.0% done] [  6244/  9160 kb/s] [eta 00m:47s]
Threads: 3: [mmm] [22.2% done] [  8568/  5764 kb/s] [eta 00m:42s]
Threads: 3: [mmm] [25.5% done] [  6080/  6568 kb/s] [eta 00m:38s]
Threads: 3: [mmm] [29.8% done] [ 10128/  1480 kb/s] [eta 00m:33s]
Threads: 3: [mmm] [31.9% done] [  4868/  6272 kb/s] [eta 00m:32s]
Threads: 3: [mmm] [36.4% done] [ 10292/  1940 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [38.6% done] [  3468/  5788 kb/s] [eta 00m:27s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19551, got signal=6
Threads: 2: [m_m] [42.9% done] [  6852/  3284 kb/s] [eta 00m:24s]
Threads: 2: [m_m] [46.3% done] [  1944/  8584 kb/s] [eta 00m:22s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19552, got signal=6
Threads: 1: [m__] [52.6% done] [  3484/  8184 kb/s] [eta 00m:18s]
Threads: 1: [m__] [60.0% done] [ 10111/     0 kb/s] [eta 00m:14s]
Threads: 1: [m__] [66.7% done] [  3216/  6765 kb/s] [eta 00m:11s]
Threads: 1: [V__] [76.7% done] [ 15153/  1878 kb/s] [eta 00m:07s]
Threads: 1: [V__] [96.0% done] [ 25254/     0 kb/s] [eta 00m:01s]
fio: (groupid=0): err= 0: pid=19550
  read : io=100MiB, bw=4,183KiB/s, runt= 25029msec
    slat (msec): min=    0, max=   10, avg= 0.01, stdev= 0.36
    clat (msec): min=    0, max= 6844, avg=82.90, stdev=485.81
    bw (KiB/s) : min=   11, max=27768, per=79.93%, avg=7359.16, stdev=7798.85
  write: io=51,012KiB, bw=2,295KiB/s, runt= 22752msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  803, avg=86.12, stdev=107.28
    bw (KiB/s) : min=    0, max=10768, per=62.80%, avg=3754.95, stdev=2807.41
  cpu          : usr=0.30%, sys=0.99%, ctx=6228
  IO depths    : 1=0.9%, 2=4.9%, 4=48.6%, 8=45.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.8%, 4=0.1%, 10=8.8%, 20=15.5%, 50=44.0%, 100=9.0%
     lat (msec): 250=18.0%, 500=2.9%, 750=0.3%, 1000=0.1%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=19551
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=3.3%, 4=31.8%, 8=64.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.7%, 4=0.2%, 10=1.8%, 20=3.8%, 50=18.5%, 100=42.0%
     lat (msec): 250=30.8%, 500=1.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=19552
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=1.8%, 4=28.3%, 8=69.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.2%, 10=1.1%, 20=3.6%, 50=15.2%, 100=35.8%
     lat (msec): 250=42.4%, 500=0.8%, 750=0.3%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=220MiB, aggrb=9,207KiB/s, minb=0KiB/s, maxb=4,183KiB/s, mint=0msec, maxt=25029msec
  WRITE: io=130MiB, aggrb=5,979KiB/s, minb=0KiB/s, maxb=2,295KiB/s, mint=0msec, maxt=25029msec

Disk stats (read/write):
  sda: ios=3703/2491, merge=629/1601, ticks=38644/722184, in_queue=488964, util=99.24%
0.34user 0.55system 0:25.37elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2491minor)pagefaults 0swaps