Re: Zephyr as UOS slows down when SOS is busy
Geoffroy Van Cutsem
I’m assuming you have been using the standard launch script (from /usr/share/acrn/samples/nuc/launch_zephyr.sh) to test your Zephyr app. If so, can you try to use this script instead to see if it makes any difference? https://paste.ubuntu.com/p/rCjfYv3QV4/
I have not tried it yet with your app but it’s able to launch the Zephyr “Hello World! Acrn” app.
From: VanCutsem, Geoffroy
Sent: Tuesday, January 21, 2020 4:18 PM
Subject: RE: [acrn-users] Zephyr as UOS slows down when SOS is busy
My best guess as to what’s happening is that there is some contention between the Service VM and the Zephyr VM to use the cache, Zephyr would typically stay in cache but now that there is some heavy load in the Service VM, it may get evicted at times. This is where Cache Allocation Technology (CAT) can help further isolate the VMs, especially against so-called “noisy neighbours. Unfortunately, Kaby Lake does not support CAT. Here is more about CAT and how to use it with ACRN: https://projectacrn.github.io/latest/getting-started/rt_industry.html?#configure-cat
From: acrn-users@... <acrn-users@...>
On Behalf Of Alfonso Sanchez-Beato
On Tue, Jan 21, 2020 at 1:07 PM Alfonso Sanchez-Beato <alfonso.sanchez-beato@...> wrote:
I forgot to mention that I am testing on a NUC7i7DNH.