这玩意有点吵，unsub了
3 surprising things Linux sysadmins can do with systemdalansmitheeThu, 03/23/2023 - 03:00
It's not just for making your computer boot faster. Download our new systemd eBook for Linux sysadmins for more tips.
When it first started out, there was a lot of press about systemd and its ability to speed up boot time. That feature had a mostly-universal appeal (it's less important to…
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(author: alansmithee)
Chips and Cheese
Raytracing on AMD’s RDNA 2/3, and Nvidia’s Turing and Pascal
#ChipAndCheese
Telegraph | source
(author: clamchowder)
Raytracing on AMD’s RDNA 2/3, and Nvidia’s Turing and Pascal
#ChipAndCheese
Telegraph | source
(author: clamchowder)
Enable Sysadmin
How to create multidomain web applications with Podman and Nginx
Learn how to use Podman and Nginx to work with applications from different domains on the same host.
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(author: Alexon Oliveira)
How to create multidomain web applications with Podman and Nginx
Learn how to use Podman and Nginx to work with applications from different domains on the same host.
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(author: Alexon Oliveira)
Enable Sysadmin
Not applying updates? You're doing it wrong
All your excuses for not doing updates—from fear of downtime to concerns about testing—are wrong.
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(author: Scott McBrien)
Not applying updates? You're doing it wrong
All your excuses for not doing updates—from fear of downtime to concerns about testing—are wrong.
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(author: Scott McBrien)
Enable Sysadmin
Build a golden image for your RHEL homelab with Image Builder
Create customized templates for your Red Hat Enterprise Linux (RHEL)-based homelab that you can deploy repeatedly with automated upkeep.
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(author: Eric "IT Guy" Hendricks)
Build a golden image for your RHEL homelab with Image Builder
Create customized templates for your Red Hat Enterprise Linux (RHEL)-based homelab that you can deploy repeatedly with automated upkeep.
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(author: Eric "IT Guy" Hendricks)
kp920这个corner case的情况已经不能叫corner case了，感觉一些日常的应用也需要人工汇编fine tune或者修改编译器才能避开性能黑点或者说达到预期性能
22年我做一个在kp920上纠错码的kernel优化，当时就遇到各种奇怪的问题。
典型的就是访存带宽的问题。
另一个当时觉得匪夷所思的是向量性能很迷惑，当混杂向量指令和小循环时，整个处理器的性能会退化到接近顺序处理器的性能。现在看来很可能是调度队列大小+整数向量跨域前递的问题。
典型的就是访存带宽的问题。
另一个当时觉得匪夷所思的是向量性能很迷惑，当混杂向量指令和小循环时，整个处理器的性能会退化到接近顺序处理器的性能。现在看来很可能是调度队列大小+整数向量跨域前递的问题。
商业角度我不懂，单纯从处理器设计的角度，kp920给我的感觉是一个设计初期堆feature堆到一半的产品，和香山南湖甚至雁栖湖甚至龙芯杯作品的情况比较相似。基本是没有做细节上的打磨，非常多的corner case极易在某些常见应用上遇到问题。相当一些设计没有做过fine tuning甚至说benchmark，连在spec 06/17上都没有做。这个设计水平距离同时代的A76都差了不少，更不要说苹果和Intel了。
现在无需怀疑kp920是买的A76改改了，前端设计一塌糊涂，访存像是龙芯杯作品，这就是信创灵车吗…
Enable Sysadmin
Storing sensitive data using Podman secrets: Which method should you use?
Podman supports two ways for storing sensitive data: using raw Podman secrets or creating Kubernetes secrets using Podman.
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(author: Ygal Blum)
Storing sensitive data using Podman secrets: Which method should you use?
Podman supports two ways for storing sensitive data: using raw Podman secrets or creating Kubernetes secrets using Podman.
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(author: Ygal Blum)
Enable Sysadmin
Create a libvirt network with Open vSwitch
libvirt's default Linux bridge imposes limitations with some advanced network features. Try using OVS to implement libvirt networks instead.
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(author: David Silva)
Create a libvirt network with Open vSwitch
libvirt's default Linux bridge imposes limitations with some advanced network features. Try using OVS to implement libvirt networks instead.
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(author: David Silva)
