On Wed, Mar 23, 2016 at 11:01:08AM +0100, Manuel Bouyer wrote: > Here's a few tests I ran. > Hardware is a Dell optiplex 755 (core 2 duo, WDC WD20EARS-00MVWB0, on Intel > AHCI):
[results snipped] You're not seeing anything close to the out-of-control interrupt time I'm seeing. My hardware, maybe? One thing I notice is that on this hardware, it is impossible to disable VT-D. We saw a problem on another box where with VT-D, interrupts were never delivered... but that is not what we are seeing here. Thor
