Does the laptop use shared system memory for video?
On August 22, 2020 12:29:58 PM HST, Nicola Pandini <nicola.pandini@xxxxxxxxx> wrote:
Hello list!
I have a setup that I use in my live sets made with an ASUS N551 laptops
and a NI Komplete Audio 6, which allows me to play without XRUNS at 64
frames / period with a modular approach (Qtractor, LinuxSampler,
Yoshimi, SooperLooper, PureData).
The whole thing runs on Debian Stretch with AVLinux 4.9.47-rt37avl2 kernel.
I am quite happy with the performance of this setup, but I started
having XRUNS when I added real-time video management as well. Those
issues made me notice that the system runs without XRUNS only if XOrg is
not stressed much, while it starts producing XRUNS when I play a video,
or when I open the browser, or even when I quickly move or resize a window.
I would like to understand if the problem is due to an incorrect
configuration of realtime priorities, or to something that I have not
yet managed to trap.
I currently use these configurations:
[Xorg]
The video driver is i915.
I read on the internet that:
"If your graphic card was manufactured in 2007 and newer, try
uninstalling the xserver-xorg-video-intel package and use the builtin
modesetting driver (xserver-xorg-core) instead"
Questions:
- I uninstalled xserver-xorg-video-intel, but I still see the i915
driver: is that correct, or should I see another driver?
[rtirq]
RTIRQ_NAME_LIST = "snd usb i8042"
RTIRQ_PRIO_HIGH = 90
RTIRQ_PRIO_DECR = 5
RTIRQ_PRIO_LOW = 51
RTIRQ_RESET_ALL = 0
RTIRQ_NON_THREADED = "rtc snd"
Questions:
- rtc must be in "NON_THREADED", or in "RTIRQ_NAME_LIST"?
- in "RTIRQ_NAME_LIST" can I remove "usb" and put only the item that
manages my USB card? Should it be xhci?
- can i take i8042 off the list?
- is it recommended to use RTIRQ_RESET_ALL = 1 to override all other IRQs?
[jackd]
jackd -P83 -dalsa -dhw: K6 -r44100 -p64 -n2 -I1
Questions:
- the priority must be lower than those that are set to the IRQs by rtirq?
[limits.conf]
@audio - rtprio 99 # maximum realtime priority
@audio - memlock unlimited # maximum locked-in-memory address space (KB)
Questions:
- what is the recommended value of rtprio in 2020? On the internet I
find 90, 95 and 99
Can you help me do a checkup of my configuration?
Thanks!
David W. Jones
gnome@xxxxxxxxxxxxx
authenticity, honesty, community
http://dancingtreefrog.com
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