Execution slowdown when TAM enabled

[harlan4096]

<p><strong>Reproduction steps:</strong></p>
<p><span>0.- Install VLC 3.0.4 x64</span></p>
<p><span>1.- Enable TAM</span></p>
<p>2.- Open an audio mp3 file</p>
<p>3.- VLC takes more than 30 seconds to open and start to reproduce the mp3 file</p>
<p>4.- If You close VLC and try again, will open fast, but with every new session, or in the same session after some time, again You may get slowdown execution VLC.</p>
<p><span>I'm not getting this behaviour with all applications + TAM enabled, but probably it is reproducible with others. </span></p>
<p><span>I already reported this behaviour some years ago during beta testing of previous build of Kaspersky KIS/KTS.</span></p>
<p><span></span></p>
<p><strong>Actual result:</strong></p>
<p><span>VLC takes more than 30 seconds to open.</span></p>
<p><span></span></p>
<p><strong>Expected Result:</strong></p>
<p><span>VLC should open in about 1 ~ 2 seconds.</span></p>

[Dmitriy.Pisarets]

<p>@harlan4096, Hello!  </p>
<p></p>
<p>Developers ask for full traces from the very beginning: </p>
<p>1 Please, set traces to maximum level</p>
<p>2 <span>Enable TAM (let it finish software analyze) </span></p>
<p><span>3 Start xperf  (only after TAM is enabled)</span></p>
<p><span>4 Open mp3 with VLC</span></p>
<p><span>5 Please, try to reproduce "long time" mp3 start for second time  ("...every new session, or in the same session after some time...")</span></p>

[harlan4096]

<p>Ok, let me some days, I have to install Microsoft Windows AD Kit (xperf) and try to reproduce again the process...</p>

[Dmitriy.Pisarets]

<p>@harlan4096, take your time ) </p>

[Dmitriy.Pisarets]

<p>Hello! Just want to remind that we looking forward traces from you. <span>Thanks for understanding!</span></p>

[harlan4096]

<p>Yes! I was waiting for the new build! installing it now!</p>

[harlan4096]

<p>Shall I use this trace.cmd file to collect xperf traces?</p>
<blockquote>
<p>xperf -on base+cswitch+compact_cswitch+fileio -stackwalk profile -buffersize 1024</p>
<p>pause</p>
<p>xperf -d trace.etl</p>
</blockquote>

[Dmitriy.Pisarets]

<p>@harlan4096, Yeap, it's look right.</p>

[harlan4096]

<p>Ok, this is the 1st delivering, includes:</p>
<p></p>
<p>* Full TAM traces during enabling/analysis.</p>
<p>* Xperf debug traces of 1st VLC execution after TAM enabling.</p>
<p></p>
<p>Will collect more traces to reproduce "long time" slowdown soon...</p>
<p></p>
<p>Traces (1,3GB compressed of more than 19GB of raw data): https://cloud.qainfo.ru/s/Rx5GSL20lHmsi7V</p>

[Dmitriy.Pisarets]

<p>@harlan4096 said in <a href="/post/2517" target="_blank" rel="noopener">Execution slowdown when TAM enabled</a>:</p>
<blockquote>https://cloud.qainfo.ru/s/Rx5GSL20lHmsi7V</blockquote>
<p>thank you</p>

[Dmitriy.Pisarets]

<p>@harlan4096, hello! Can you try to reproduce it with new version? Problem should be already fixed. </p>

[harlan4096]

<p>Thanks, let me a bit of time and I'll confirm soon!</p>

[harlan4096]

<p>@<strong><a href="/user/dmitriy-pisarets" target="_blank" rel="noopener" data-username="Dmitriy.Pisarets" data-uid="167">Dmitriy.Pisarets:</a> </strong></p>
<p>It seems the issue is fixed, now opening a mp3 file with VLC in my system and TAM enabled (for the 1st time ina Windows session) takes about 3 or 4 seconds which is  reasonable :)</p>
<p>Thanks!</p>

[Dmitriy.Pisarets]

<p>@harlan4096 thank you аor your time !</p>