On 2022/07/28 12:57, Scott Cheloha wrote: > On Thu, Jul 28, 2022 at 07:55:40AM -0400, Dave Voutila wrote: > > > > This is breaking timecounter selection on my x13 Ryzen 5 Pro laptop > > running the latest kernel from snaps. > > Define "breaking".
That's clear from the output: : On 2022/07/28 07:55, Dave Voutila wrote: : > $ sysctl -a | grep tsc : > kern.timecounter.choice=i8254(0) tsc(-1000) acpihpet0(1000) : > acpitimer0(1000) : > machdep.tscfreq=2096064730 : > machdep.invarianttsc=1 : > : > $ sysctl kern.timecounter : > kern.timecounter.tick=1 : > kern.timecounter.timestepwarnings=0 : > kern.timecounter.hardware=i8254 : > kern.timecounter.choice=i8254(0) tsc(-1000) acpihpet0(1000) : > acpitimer0(1000) > The code detects TSC desync and marks the timecounter non-monotonic. That's good (and I think as would have happened before) > So it uses the i8254 instead. But that's not so good, there are higher prio timecounters available, acpihpet0 and acpitimer0, which would be better choices than i8254.
