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OLIMEX / DIY-LAPTOP

Do It Yourself Open Source Hardware and Software Modular Hacker's Friendly Laptop
Apache License 2.0
493 stars 88 forks source link

kernel PREEMPT, are there alternatives? #27

Closed albjeremias closed 2 months ago

albjeremias commented 6 years ago

Is your feature request related to a problem? Please describe. I feel that my teres is quite slow, using firefox... Which kind of optimizations can I do? Can i upgrade the RAM? (i dont think so, just confirming)

Describe the solution you'd like I'd like to known the command to install another kernel which is not preempt, will it affect anything? is teres using grub?

i expect something like: $ sudo apt install kernel-...-non-preempt

Describe alternatives you've considered Try to install it, but i might break the bootloader? Or even the cpu may not be compatible...

jcstaudt commented 6 years ago

Unfortunately the memory isn't expandable. Memory upgrades on the TERES are the most pressing need, and the platform has received criticism on social media for this limitation. With the overwhelming number of web apps running on practically any modern website, casual web browsing is extremely limited on any computer with <4GB of RAM. The A64 is limited to 3GB RAM so an alternative processor would be required. The Rockchip RK3328 SoC supports at least 4GB, but I am not sure what its max is. It would be nice to feature standard memory interfaces and memory controllers on the TERES to allow modularity. (Are these interfaces all "open?" See the MNT Reform for an idea of what I mean.)

I'm not immediately aware of an easy way to do that, but I'd be interested to know! TERES uses u-boot and not grub. For example, here is some information regarding a Debian installation on the TERES.

q2dg commented 6 years ago

Thanks for your clear explanation, @jcstaudt . Unfortunately, having only 2GB of RAM (and not being able to upgrade it) is a definitive black hole. Thanks anyway for your effort.

jakeogh commented 5 years ago

The RK3328 datasheet mentions it's a 32bit memory bus on page 7: http://opensource.rock-chips.com/images/d/d7/Rockchip_RK3328_Datasheet_V1.1-20170309.pdf

Kreyren commented 1 year ago

@q2dg Why is it a black hole? I run full GNOME and do engineering in FreeCAD on my teres without an issue O_o

q2dg commented 1 year ago

Well, it depends on your use cases. As @jcstaudt has said, "With the overwhelming number of web apps running on practically any modern website, casual web browsing is extremely limited on any computer with <4GB of RAM." So, well, maybe it's not your experience. Greetings.