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#zen2

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Fell<p>Does anyone know more about the Linux scheduler? Like, how does it behave when some tasks are pinned to certain cores while others are not? Does other tasks naturally tend to stay away from those "reserved" cores?</p><p>I would appreciate any resources on this topic. It's interesting.</p><p>3/3</p><p><a href="https://ma.fellr.net/tags/Hardware" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Hardware</span></a> <a href="https://ma.fellr.net/tags/CPU" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CPU</span></a> <a href="https://ma.fellr.net/tags/AMD" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AMD</span></a> <a href="https://ma.fellr.net/tags/Zen2" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Zen2</span></a> <a href="https://ma.fellr.net/tags/Ryzen" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Ryzen</span></a> <a href="https://ma.fellr.net/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Linux</span></a> <a href="https://ma.fellr.net/tags/Performance" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Performance</span></a> <a href="https://ma.fellr.net/tags/Gaming" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Gaming</span></a> <a href="https://ma.fellr.net/tags/LinuxGaming" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>LinuxGaming</span></a></p>
Fell<p>I always wondered why my 3900X with 64 MB of cache performs so much worse than a 5700X3D with 96 MB of cache. It's only ⅓ more cache, after all.</p><p>Well, `lstopo` had the answer. The cache is split into 4 chunks (CCXs), so a single thread only really has 16 MB of cache available. </p><p>I actually managed to gain a few FPS through isolating a group of cores that share an L3 cache by manually setting CPU affinity.</p><p>1/3</p><p><a href="https://ma.fellr.net/tags/Hardware" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Hardware</span></a> <a href="https://ma.fellr.net/tags/CPU" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CPU</span></a> <a href="https://ma.fellr.net/tags/AMD" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AMD</span></a> <a href="https://ma.fellr.net/tags/Zen2" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Zen2</span></a> <a href="https://ma.fellr.net/tags/Ryzen" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Ryzen</span></a> <a href="https://ma.fellr.net/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Linux</span></a> <a href="https://ma.fellr.net/tags/Performance" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Performance</span></a> <a href="https://ma.fellr.net/tags/Gaming" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Gaming</span></a> <a href="https://ma.fellr.net/tags/LinuxGaming" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>LinuxGaming</span></a></p>
Nicholas<p><span class="h-card" translate="no"><a href="https://mstdn.games/@SkyeBlau" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>SkyeBlau</span></a></span> <a href="https://mastos.online/tags/OnceHuman" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>OnceHuman</span></a> is an interesting game. I like that it is <a href="https://mastos.online/tags/FreeToPlay" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FreeToPlay</span></a>. </p><p>I can also confirm it runs on <a href="https://mastos.online/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Linux</span></a> and fairly well on an <a href="https://mastos.online/tags/AMD" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AMD</span></a> <a href="https://mastos.online/tags/Zen2" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Zen2</span></a> <a href="https://mastos.online/tags/Ryzen" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Ryzen</span></a> 5700u. Fairly well is due to <a href="https://mastos.online/tags/FSR3" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FSR3</span></a> and <a href="https://mastos.online/tags/FrameGeneration" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FrameGeneration</span></a></p>
Benjamin Carr, Ph.D. 👨🏻‍💻🧬<p><a href="https://hachyderm.io/tags/AMD" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AMD</span></a> discloses slew of high severity <a href="https://hachyderm.io/tags/security" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>security</span></a> <a href="https://hachyderm.io/tags/vulnerabilities" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>vulnerabilities</span></a> for <a href="https://hachyderm.io/tags/Zen" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Zen</span></a> systems, from the original Zen chips to the latest <a href="https://hachyderm.io/tags/Zen4" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Zen4</span></a> <a href="https://hachyderm.io/tags/CPU" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CPU</span></a>, that attacks <a href="https://hachyderm.io/tags/BIOS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>BIOS</span></a> chips, we finally have a <a href="https://hachyderm.io/tags/Zenbleed" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Zenbleed</span></a> fix. AMD is patching the vulnerabilities through new versions of <a href="https://hachyderm.io/tags/AGESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AGESA</span></a>, for <a href="https://hachyderm.io/tags/Zen2" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Zen2</span></a>-based chips, in particular, many of these new AGESAs also patch Zenbleed, including <a href="https://hachyderm.io/tags/Epyc" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Epyc</span></a> <a href="https://hachyderm.io/tags/Server" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Server</span></a> chips <a href="https://bit.ly/3I1JKds" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">bit.ly/3I1JKds</span><span class="invisible"></span></a> <a href="https://www.tomshardware.com/pc-components/cpus/amd-discloses-slew-of-high-severity-security-vulnerabilities-for-zen-chips-that-attack-bios-chips-updates-aim-to-patch-bugs-finally-fix-zenbleed" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">tomshardware.com/pc-components</span><span class="invisible">/cpus/amd-discloses-slew-of-high-severity-security-vulnerabilities-for-zen-chips-that-attack-bios-chips-updates-aim-to-patch-bugs-finally-fix-zenbleed</span></a></p>
IT News<p>Encryption-breaking, password-leaking bug in many AMD CPUs could take months to fix - Enlarge (credit: AMD) </p><p>A recently disclosed bug in many of AMD'... - <a href="https://arstechnica.com/?p=1956383" rel="nofollow noopener" target="_blank"><span class="invisible">https://</span><span class="">arstechnica.com/?p=1956383</span><span class="invisible"></span></a> <a href="https://schleuss.online/tags/ryzen53600" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ryzen53600</span></a> <a href="https://schleuss.online/tags/ryzen3000" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ryzen3000</span></a> <a href="https://schleuss.online/tags/ryzen4000" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ryzen4000</span></a> <a href="https://schleuss.online/tags/ryzen5000" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ryzen5000</span></a> <a href="https://schleuss.online/tags/ryzen7000" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ryzen7000</span></a> <a href="https://schleuss.online/tags/security" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>security</span></a> <a href="https://schleuss.online/tags/amdryzen" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>amdryzen</span></a> <a href="https://schleuss.online/tags/meltdown" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>meltdown</span></a> <a href="https://schleuss.online/tags/zenbleed" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>zenbleed</span></a> <a href="https://schleuss.online/tags/biz" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>biz</span></a>⁢ <a href="https://schleuss.online/tags/tech" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>tech</span></a> <a href="https://schleuss.online/tags/zen2" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>zen2</span></a></p>
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