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"content": "<p>Alder Lake 的 SHLX 變慢的問題</p><p>看到「The Alder Lake SHLX Anomaly (tavianator.com)」這篇提到 Alder Lake (Intel 的第 12 代 CPU) 的 SHLX 變慢的問題，原文在「The Alder Lake SHLX anomaly」這邊。</p><p>這個指令蠻簡單的，理論上不論在什麼情況下都應該是 1 cycle，但作者發現在 Alder Lake 的 P core 上面反而需要 3 cycles (Alder Lake 的 E</p><p><a href=\"https://blog.gslin.org/archives/2025/01/03/12180/alder-lake-%e7%9a%84-shlx-%e8%ae%8a%e6%85%a2%e7%9a%84%e5%95%8f%e9%a1%8c/\" target=\"_blank\" rel=\"nofollow noopener noreferrer\" translate=\"no\"><span class=\"invisible\">https://</span><span class=\"ellipsis\">blog.gslin.org/archives/2025/0</span><span class=\"invisible\">1/03/12180/alder-lake-%e7%9a%84-shlx-%e8%ae%8a%e6%85%a2%e7%9a%84%e5%95%8f%e9%a1%8c/</span></a></p><p><a href=\"https://abpe.org/tags/Computer\" class=\"mention hashtag\" rel=\"tag\">#<span>Computer</span></a> <a href=\"https://abpe.org/tags/Hardware\" class=\"mention hashtag\" rel=\"tag\">#<span>Hardware</span></a> <a href=\"https://abpe.org/tags/Murmuring\" class=\"mention hashtag\" rel=\"tag\">#<span>Murmuring</span></a> <a href=\"https://abpe.org/tags/Programming\" class=\"mention hashtag\" rel=\"tag\">#<span>Programming</span></a> <a href=\"https://abpe.org/tags/alder\" class=\"mention hashtag\" rel=\"tag\">#<span>alder</span></a> <a href=\"https://abpe.org/tags/cpu\" class=\"mention hashtag\" rel=\"tag\">#<span>cpu</span></a> <a href=\"https://abpe.org/tags/cycle\" class=\"mention hashtag\" rel=\"tag\">#<span>cycle</span></a> <a href=\"https://abpe.org/tags/intel\" class=\"mention hashtag\" rel=\"tag\">#<span>intel</span></a> <a href=\"https://abpe.org/tags/lake\" class=\"mention hashtag\" rel=\"tag\">#<span>lake</span></a> <a href=\"https://abpe.org/tags/performance\" class=\"mention hashtag\" rel=\"tag\">#<span>performance</span></a> <a href=\"https://abpe.org/tags/shlx\" class=\"mention hashtag\" rel=\"tag\">#<span>shlx</span></a> <a href=\"https://abpe.org/tags/slow\" class=\"mention hashtag\" rel=\"tag\">#<span>slow</span></a></p>",
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"zh": "<p>Alder Lake 的 SHLX 變慢的問題</p><p>看到「The Alder Lake SHLX Anomaly (tavianator.com)」這篇提到 Alder Lake (Intel 的第 12 代 CPU) 的 SHLX 變慢的問題，原文在「The Alder Lake SHLX anomaly」這邊。</p><p>這個指令蠻簡單的，理論上不論在什麼情況下都應該是 1 cycle，但作者發現在 Alder Lake 的 P core 上面反而需要 3 cycles (Alder Lake 的 E</p><p><a href=\"https://blog.gslin.org/archives/2025/01/03/12180/alder-lake-%e7%9a%84-shlx-%e8%ae%8a%e6%85%a2%e7%9a%84%e5%95%8f%e9%a1%8c/\" target=\"_blank\" rel=\"nofollow noopener noreferrer\" translate=\"no\"><span class=\"invisible\">https://</span><span class=\"ellipsis\">blog.gslin.org/archives/2025/0</span><span class=\"invisible\">1/03/12180/alder-lake-%e7%9a%84-shlx-%e8%ae%8a%e6%85%a2%e7%9a%84%e5%95%8f%e9%a1%8c/</span></a></p><p><a href=\"https://abpe.org/tags/Computer\" class=\"mention hashtag\" rel=\"tag\">#<span>Computer</span></a> <a href=\"https://abpe.org/tags/Hardware\" class=\"mention hashtag\" rel=\"tag\">#<span>Hardware</span></a> <a href=\"https://abpe.org/tags/Murmuring\" class=\"mention hashtag\" rel=\"tag\">#<span>Murmuring</span></a> <a href=\"https://abpe.org/tags/Programming\" class=\"mention hashtag\" rel=\"tag\">#<span>Programming</span></a> <a href=\"https://abpe.org/tags/alder\" class=\"mention hashtag\" rel=\"tag\">#<span>alder</span></a> <a href=\"https://abpe.org/tags/cpu\" class=\"mention hashtag\" rel=\"tag\">#<span>cpu</span></a> <a href=\"https://abpe.org/tags/cycle\" class=\"mention hashtag\" rel=\"tag\">#<span>cycle</span></a> <a href=\"https://abpe.org/tags/intel\" class=\"mention hashtag\" rel=\"tag\">#<span>intel</span></a> <a href=\"https://abpe.org/tags/lake\" class=\"mention hashtag\" rel=\"tag\">#<span>lake</span></a> <a href=\"https://abpe.org/tags/performance\" class=\"mention hashtag\" rel=\"tag\">#<span>performance</span></a> <a href=\"https://abpe.org/tags/shlx\" class=\"mention hashtag\" rel=\"tag\">#<span>shlx</span></a> <a href=\"https://abpe.org/tags/slow\" class=\"mention hashtag\" rel=\"tag\">#<span>slow</span></a></p>"
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