ARM64 系統 + Ubuntu 20.04 裝 virt-manager 碰到一些問題，第一關是碰到 libvirtd 被 mask 掉了，這個簡單
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Unable to complete install: internal error: cannot load AppArmor profile libvirt
Posted by richliu
on 2023/03/05
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Stable Diffusion webui CPU only on ARM64 Platform
Posted by richliu
on 2023/03/04
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Stable Diffusion webui is a web service based on Gradio library for Stable Diffusion. The installation process can automatically set up the environment and install Stable Diffusion, which can save a lot of time. However, it requires an NVIDIA or AMD GPU to install it. If you want to install Stable Diffusion WebUI without a GPU, some modifications are necessary.
Using a CPU to run Stable Diffusion can be painful, so this article is just for fun.
Platform is Ampere Altra Mt. Collins system with 2 Ampere Altra CPU, total 160 cores.
OS: ubuntu 22.04.02 LTS
Seems Stable Diffustion webui needs python 3.10, so, ubuntu 22.04 is good choice.
Raspberry Pi Pico W + PicoOLED 2.23 + Arduino 顯示天氣預報降雨機率和空污指數
Posted by richliu
on 2023/01/15
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有時候人生就是不能亂買東西，一步錯步步錯，然後就弄了這個出來，當然不是圖中大螢幕的屋內屋外溫濕度狀況，而是左上角小小的溫度預測
至於怎麼來的，一切都要從邪惡的阿媽爽60元免運說起，因為60元免運，有時候就會將有些小東西放到購物車內，因為有時候即使加了稅金，從美亞（美國亞馬遜Amazon）網站買東西還比淘寶買便宜，更不要說很多東西只有美亞有，這時候小東西湊60元免運頗方便的
原來是我有二張 Arduino 的板子，本來也只是接來做溫度偵測，也沒有什麼用，想說接個小螢幕顯示一下天氣預報，但是這東西又不是很必要，就想想而已，就隨便找了一個看起來順眼的 SPI LCD 和 OLED （想說比較省電）就放到購物車了，上個月美國很多東西都特價，兩雙鞋子才 30 元美金，這塊 OLED 好像也才 15 上下，就被拿來湊運費了，沒想到我手上並沒有東西可以接
Linux Kernel Install Fail Because Broadcom NetXtreme 100G DKMS Driver Build Failed.
Posted by richliu
on 2022/09/27
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Environment is CentOS 8, broadcom 100G NetXtreme-E series driver .
Host : Ampere Altra Platform
if rebuild the CentOS kernel and there was previous Broadcom nic driver alredy installed, it will trigger dkms to rebuild the driver on current kernel.
make install error as following
Multi-socket is doomed
Posted by richliu
on 2022/06/28
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Brendan Gregg 在 2021 年的演講提到的 Multi-socket is doomed
他的理由是如果在 cloud 上擴展 CPU ，可以再加開 instance 就好，沒有必要一定要讓該機器的 CPU 數變多，因為跨 CPU 的存取的工程非常浩大，而且會有很多問題產生
今天我們就看到有人就這樣幹了
ARM64 Linux Performance Tuning
Posted by richliu
on 2021/05/19
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This is personal notebook for ARM64 performance tuning.
Read more »[Gentoo][ARM64] Compile qtwebengine fail
Posted by richliu
on 2021/03/23
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If CPU number is too much, compile qtwebengine will fail, seems ninja compile issues.
it better to reduce CPU number under 8, batter number is 4 or 6.
just put MAKEOPTS=”-j 4″ on your /etc/portage/make.conf
It can be roll back after compile qtwebengine.
modify package.env can support special MAKEOPTS command on some packages.
ex:
echo "dev-qt/qtwebengine lowcpu.conf" | sudo tee -a /etc/portage/package.env
mkdir -p /etc/portage/env
echo "MAKEOPTS=\"-j4\"" | sudo tee /etc/portage/env/lowcpu.confref.
[SOLVED] emerging qtwebengine-5.7.1
Memory problems on QtWebEngine build
Gentoo ARM64 UEFI Install Guide
Posted by richliu
on 2020/07/09
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This is not a detail guide to describe how to full install system, just figure out some important point. Even not for Gentoo newbie.
Most important handbook is Gentoo AMD64 installation guide.
There is some different between ARM64 and AMD64
2021/08/31 Updated : No more need Ubuntu ISO image, ARM64 EFI minimal ISO can be download from official website: https://www.gentoo.org/downloads/
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