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<p class="MsoNormal"><span lang="EN-US">Hi guys<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I want to build a test scenario to see the difference in performance between the size of DAX windows and the size of read files. But it's not that I don't know how to build.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I tried the following two methods, but it seems that the performance results are similar<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">fio -filename=/usr/share/nginx/html/400MBfile --rw=randread --loops=10 --group_reporting --name=400MBfile<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">fio -filename=/usr/share/nginx/html/5Gfile --rw=randread -bs=16k --group_reporting --name=5Gfile<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">sh-4.4# fio -filename=/usr/share/nginx/html/5Gfile --rw=randread -bs=16k --group_reporting --name=5Gfile<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">5Gfile: (g=0): rw=randread, bs=(R) 16.0KiB-16.0KiB, (W) 16.0KiB-16.0KiB, (T) 16.0KiB-16.0KiB, ioengine=psync, iodepth=1<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">fio-3.19<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Starting 1 process<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Jobs: 1 (f=1): [r(1)][100.0%][r=148MiB/s][r=9450 IOPS][eta 00m:00s]<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">5Gfile: (groupid=0, jobs=1): err= 0: pid=139: Thu Jul 1 09:38:07 2021<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> read: IOPS=9931, BW=155MiB/s (163MB/s)(5120MiB/32993msec)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> clat (usec): min=52, max=18734, avg=95.79, stdev=69.49<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> lat (usec): min=53, max=18735, avg=96.47, stdev=69.53<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> clat percentiles (usec):<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> | 1.00th=[ 61], 5.00th=[ 64], 10.00th=[ 66], 20.00th=[ 71],<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> | 30.00th=[ 75], 40.00th=[ 79], 50.00th=[ 82], 60.00th=[ 88],<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> | 70.00th=[ 97], 80.00th=[ 114], 90.00th=[ 141], 95.00th=[ 163],<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> | 99.00th=[ 235], 99.50th=[ 293], 99.90th=[ 734], 99.95th=[ 807],<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> | 99.99th=[ 1287]<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> bw ( KiB/s): min=87471, max=191168, per=100.00%, avg=159511.97, stdev=18299.18, samples=65<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> iops : min= 5466, max=11948, avg=9969.48, stdev=1143.77, samples=65<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> lat (usec) : 100=72.93%, 250=26.28%, 500=0.52%, 750=0.19%, 1000=0.06%<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> lat (msec) : 2=0.01%, 4=0.01%, 10=0.01%, 20=0.01%<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> cpu : usr=6.04%, sys=46.45%, ctx=329379, majf=1, minf=13<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> issued rwts: total=327680,0,0,0 short=0,0,0,0 dropped=0,0,0,0<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> latency : target=0, window=0, percentile=100.00%, depth=1<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Run status group 0 (all jobs):<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> READ: bw=155MiB/s (163MB/s), 155MiB/s-155MiB/s (163MB/s-163MB/s), io=5120MiB (5369MB), run=32993-32993msec<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:12.0pt;font-family:"-webkit-standard",serif;color:black">Best Regards,<o:p></o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:12.0pt;font-family:"-webkit-standard",serif;color:black">-- <o:p></o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:12.0pt;font-family:"-webkit-standard",serif;color:black">ryo li<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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