Welcome • User Guide
ToS • Privacy • Canary
Donate • Bugs • License

©2024 Poal.co

156

I had a laptop that got a huge performance hit from the kernel fix that "fixed" spectre. It rendered the laptop garbage. I was thinking to reuse that laptop simply for music / news / surfing as a work alternative laptop. I looked into if it was possible to turn off the spectre fixes and if it was possible to check if the fixes were in (or they came up with a faster fix). Found that you can check if it's being "fixed" with lscpu. And a grub flag can tell the kernel to turn them off.

https://leochavez.org/index.php/2020/11/16/disabling-intel-and-amd-cpu-vulnerability-mitigations/

I had a laptop that got a *huge* performance hit from the kernel fix that "fixed" spectre. It rendered the laptop garbage. I was thinking to reuse that laptop simply for music / news / surfing as a work alternative laptop. I looked into if it was possible to turn off the spectre fixes and if it was possible to check if the fixes were in (or they came up with a faster fix). Found that you can check if it's being "fixed" with lscpu. And a grub flag can tell the kernel to turn them off. https://leochavez.org/index.php/2020/11/16/disabling-intel-and-amd-cpu-vulnerability-mitigations/

(post is archived)

[–] • 1 pt

I'm using an old Xeon processor, and knew about these mitigations. Oddly enough, I think they've been optimized the patches since release, because I do not notice a performance difference with or without them

[–] • 1 pt

I'm not sure what happened to my old laptop. It used to perform just fine / great. I rebooted it and it took like 10 minutes to crawl to the login screen. After 10 minutes past the login screen the mouse still couldn't double click an app up.

I rebooted with a linux thumb drive and mounted in. It would take like a full second to three just to do an ls on my downloads folder (maybe 200 things to list).

I did set the "mitigations=off" in the thumb boot loader and it did seem to make a performance upgrade. But the SSD was still slower than an ftp mount. In lscpu it did confirm the mitigations were off.

Is it possible the SSD went bad after sitting too long off? I would be able to use the SSD faster as a usb mount on my other machine..

[–] • 2 pts

I had an issue like that with my wife's computer too when I did a video card update. Wound up having to redo my kernel install on it and change the updater locations to download the correct packages. I have noticed some quirks since updating to 6.1. But CPU slowdown hasn;t been one of them

[–] • 1 pt

Just got the drive out and in to an encasement. It is taking files off at 1 mb/s. USB 3.0. Never seen this before. It seems something happened to the drive that made it almost unusable. 512 GB SSD. Disturbing.