VM using 100% CPU on Linux 3+ about v86 HOT 8 CLOSED

I solved this using CONFIG_NO_HZ_IDLE and HZ=100.

from v86.

Yes, that's indeed a problem. Under Javascript the idle time should exceed 4ms. For jor1k I put even HZ=50 here.

from v86.

I wonder how do you avoid 100% CPU (on one core) with Linux, all the Linux images (2.6.x and 3.x) on copy.sh use 100% and my self compiled kernel with CONFIG_NO_HZ_IDLE=y and HZ=50 too, on both firefox and chromium.

from v86.

Well, I have everything under my control. My own distribution, my own emulator, my own compiled Linux, my own programmed Linux idle function (which wasn't implemented yet).
x86 is much more complicated. So I am not sure, what the Linux operating system expects for a system. I guess you compiled also for a single core.

from v86.

@xming: This repo builds an ISO image with Linux 4 and a 9p root file system for v86 that didn't use 100% CPU last time I tested: https://github.com/ysangkok/build-v86-9p-linux

The repo contains a Linux config that uses the settings I mentioned earlier in this thread.

from v86.

I would try to debug the setTimeout function in Javascript. to see what is the average timeout in ms for the Javascript engine. Also there is the update of the screen now and then which could influence the total CPU usage.
I tried it myself and it looks like, that the IPS indeed decrease when idle but the CPU usage remains the same.

from v86.

ysangkok: Do you have a binary?

from v86.

@s-macke yes

Here's the ISO image: https://hushfile.it/55681e725bfa2#HGrNrA2-vQP4QW20zblBtY-AjHfqrpStbaqhurka
Here's the root filesystem: https://hushfile.it/55681fc278c8d#DgLyVmrj8E-EEes80V2duyTEPQ0Sdgkai2SDpu0C
Here's the root filesystem JSON: https://hushfile.it/55682033f0e6f#8yX12xOCqtYu_a98KyRS9r5ts15NjkqtaTv5wH8H

And here's a sample HTML file that has a 9p filesystem configured for it: https://github.com/ysangkok/browser-http-proxy/blob/master/basic.html

from v86.