backwards-read: (g=0): rw=read, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=1 fio-3.28 Starting 1 process backwards-read: Laying out IO file (1 file / 128MiB) backwards-read: (groupid=0, jobs=1): err= 0: pid=108177: Tue Feb 7 18:53:47 2023 read: IOPS=133k, BW=518MiB/s (543MB/s)(128MiB/247msec) clat (nsec): min=790, max=289633, avg=7295.21, stdev=5435.87 lat (nsec): min=808, max=290241, avg=7318.58, stdev=5445.70 clat percentiles (usec): | 1.00th=[ 6], 5.00th=[ 6], 10.00th=[ 6], 20.00th=[ 6], | 30.00th=[ 6], 40.00th=[ 6], 50.00th=[ 7], 60.00th=[ 7], | 70.00th=[ 8], 80.00th=[ 8], 90.00th=[ 10], 95.00th=[ 13], | 99.00th=[ 18], 99.50th=[ 24], 99.90th=[ 90], 99.95th=[ 125], | 99.99th=[ 196] lat (nsec) : 1000=0.03% lat (usec) : 2=0.01%, 4=0.01%, 10=92.09%, 20=7.18%, 50=0.48% lat (usec) : 100=0.14%, 250=0.07%, 500=0.01% cpu : usr=5.28%, sys=48.78%, ctx=32773, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=32768,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=1 Run status group 0 (all jobs): READ: bw=518MiB/s (543MB/s), 518MiB/s-518MiB/s (543MB/s-543MB/s), io=128MiB (134MB), run=247-247msec