david <gnome(a)hawaii.rr.com> writes:
On my laptop, with Debian's 4.8.0-1-amd64 (non-RT
kernel), I can run
all day with the same USB card at 10.7msec latency, without a single
xrun. No network or video slowdown.
4.8 doesn't have the Spectre/Meltdown patches. 4.16 does. So I blame
the Spectre/Meltdown patches.
IIRC, the most likely culprit (page table isolation, making for quite
more expensive context switches) can be disabled on the kernel command
line at boot. This would be
pti=off
Of course, not to be used on a system providing non-privileged accounts
to third parties. But for an audio workstation, this might be
reasonable.
--
David Kastrup