Chips and Cheese
Sandy Bridge: Setting Intel’s Modern Foundation
#ChipAndCheese

Telegraph | source
(author: clamchowder)

苹果购买了台积电 3 纳米工艺全部产能

2023-08-08 23:03 by 无尽的边界

苹果是台积电最大的客户，该公司 2022 年 720 亿美元营收中来自苹果的订单占了 23%。苹果对于台积电的订单规模是如此之大，以至于它可以让台积电承担芯片缺陷的损失。芯片公司用大型硅晶圆一次制造多个芯片，晶圆然后切割成多个处理器晶粒（die）。芯片设计公司通常需要为每个晶粒付费，不管它是否存在缺陷。对于有缺陷的晶粒，芯片设计公司会通过降低频率或关闭部分元件的方法出售，尝试收回部分成本。对于台积电最新的 3 纳米工艺，苹果采购了短期内的全部产能，而且订单规模如此之大，台积电可以承担得起缺陷芯片的成本。也就是对于有缺陷的芯片，苹果无需承担费用。苹果将独占台积电 3 纳米工艺大约一年时间，之后才会允许其它公司采用。

https://arstechnica.com/?p=1959335

#苹果

向群友提问
把一个块设备直接给 qemu，在 qemu 里面 guest 和外面 host 看到的 iops 有显著不同（大概差两到三倍），可能是什么原因呢

Typograms: A definition and renderer for ASCII diagrams https://google.github.io/typograms/

Phoronix
Intel DOWNFALL: New Vulnerability Affecting AVX2/AVX-512 With Big Performance Implications

This Patch Tuesday brings a new and potentially painful processor speculative execution vulnerability... Downfall, or as Intel prefers to call it is GDS: Gather Data Sampling. GDS/Downfall affects the gather instruction with AVX2 and AVX-512 enabled processors. At least the latest-generation Intel CPUs are not affected but Tigerlake / Ice Lake back to Skylake is confirmed to be impacted. There is microcode mitigation available but it will be costly for AVX2/AVX-512 workloads with GATHER instructions in hot code-paths and thus widespread software exposure particularly for HPC and other compute-intensive workloads that have relied on AVX2/AVX-512 for better performance.

https://twitter.com/cutlass_charcot/status/1665318728282636290
cutlass@C102日曜日 西"あ"23b : 雨の日の出会い

リプ全返信キャンペーン中です、お気軽にどうぞ

https://youtu.be/d4vgQuwJ6S8
是预告片
🤔

"...The system locks up and the owner of the system starts to seriously consider a switch to some version of BSD."

https://lwn.net/Articles/627419/

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