Forwarded from Hacker News (yahnc_bot)
The perils of transition to 64-bit time_t https://blogs.gentoo.org/mgorny/2024/09/28/the-perils-of-transition-to-64-bit-time_t/
Michał Górny
The perils of transition to 64-bit time_t
(please note that there’s a correction at the bottom) In the Overview of cross-architecture portability problems, I have dedicated a section to the problems resulting from use of 32-bit time_…
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Forwarded from Hacker News (yahnc_bot)
Reverse-engineering a three-axis attitude indicator from the F-4 fighter plane http://www.righto.com/2024/09/f4-attitude-indicator.html
Righto
Reverse-engineering a three-axis attitude indicator from the F-4 fighter plane
We recently received an attitude indicator for the F-4 fighter plane, an instrument that uses a rotating ball to show the aircraft's orienta...
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Forwarded from Hacker News (yahnc_bot)
Cores That Don't Count [pdf] https://sigops.org/s/conferences/hotos/2021/papers/hotos21-s01-hochschild.pdf
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工科猪咨询群友一个算法问题：
现在有一个 DAG，入度为 0 的节点称为输入，出度为 0 的节点称为输出。输入输出节点数量一致，有一个一一对应关系。
对这个 DAG 做一个“纵切”，要求满足以下条件：
1. 对应的输入和输出划分到一起（Hence “纵”）
2. 每个链保证只跨过 Cut 最多一次：也就是不允许出现以下这种链（以 A/B 表示划分到哪边）：
.. -> A -> B -> ... -> B -> A -> ...
用什么算法好，或者如何 Reduce 到一个比较好的图划分问题上，然后调库侠
X 问题：Circuit as SSA，状态是输入/输出节点，做划分，不允许组合逻辑跨过 Cut 两次
现在有一个 DAG，入度为 0 的节点称为输入，出度为 0 的节点称为输出。输入输出节点数量一致，有一个一一对应关系。
对这个 DAG 做一个“纵切”，要求满足以下条件：
1. 对应的输入和输出划分到一起（Hence “纵”）
2. 每个链保证只跨过 Cut 最多一次：也就是不允许出现以下这种链（以 A/B 表示划分到哪边）：
.. -> A -> B -> ... -> B -> A -> ...
用什么算法好，或者如何 Reduce 到一个比较好的图划分问题上，
X 问题：Circuit as SSA，状态是输入/输出节点，做划分，不允许组合逻辑跨过 Cut 两次
https://youtu.be/i8OUh3YvRpk
最近跑步在听这个
最近跑步在听这个
YouTube
Aiobahn feat. やなぎなぎ - Re: searchlight (Official Music Video)
https://aiobahn-avex.lnk.to/Researchlight
Aiobahn
https://www.aiobahn.net
https://www.tiktok.com/@aiobahn.net
https://twitter.com/Aiobahn
https://www.instagram.com/aiobahn
やなぎなぎ
@yanaginagiofficial6081
https://yanaginagi.net
https://twitter.com/yanaginagi…
Aiobahn
https://www.aiobahn.net
https://www.tiktok.com/@aiobahn.net
https://twitter.com/Aiobahn
https://www.instagram.com/aiobahn
やなぎなぎ
@yanaginagiofficial6081
https://yanaginagi.net
https://twitter.com/yanaginagi…
今日 nspawn 吃瘪：
1. https://github.com/systemd/systemd/issues/12313
2. 底裤网络d 默认用 nft，但是 docker 默认用 iptables，所以首先匹配到的是 iptables 里面的 FORWARD chain，一通匹配不上 default reject 了
所以得手写 forward accept 和 conntrack
1. https://github.com/systemd/systemd/issues/12313
2. 底裤网络d 默认用 nft，但是 docker 默认用 iptables，所以首先匹配到的是 iptables 里面的 FORWARD chain，一通匹配不上 default reject 了
所以得手写 forward accept 和 conntrack
GitHub
nspawn: systemd-networkd stopped working in containers without `-U` in 242 · Issue #12313 · systemd/systemd
systemd version the issue has been seen with systemd-242 Used distribution Gentoo Linux Expected behaviour you didn't see If not passing -U to systemd-nspawn, systemd-networkd does not start su...
Forwarded from Hacker News (yahnc_bot)
Why Is Light So Fast? https://profmattstrassler.com/2024/10/01/why-is-the-speed-of-light-so-fast-part-1/
Of Particular Significance
Why is the Speed of Light So Fast? (Part 1)
The speed of light is much faster, and the energy in ordinary objects far greater, than what daily life accustoms us to. Why? Step 1: new perspectives
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