k520 card produce high volume of IRQ
Submitted by Mathieu Maret
Assigned to Nouveau Project
Description
Created attachment 125818
dmesg
Amazon propose computer with k520(GK104) GPU for virtualisation (Xen).
You can use Ubuntu LTS on it for example.
When inserting the nouveau driver, /proc/interrupts report that nvkm is doing ~100000 interrupts/sec.
This have been tested on kernel 4.4.0 and 4.4.13.
On amazon, you do not control the real hardware where your system will be run. It appear that sometimes, this issue do not happen. May be this could be due to vbios version ?
Forcing nouveau in headless mode (modeset=2) produce a normal amount of IRQ.
Attachment 125818, "dmesg":
dmesg