On Tue, Jul 05, 2022 at 07:15:31AM -0400, Dave Voutila wrote: > > Scott Cheloha <scottchel...@gmail.com> writes: > > > [...] > > > > If you fail the test you will see something like this: > > > > tsc: cpu0/cpu2: sync test round 1/2 failed > > tsc: cpu0/cpu2: cpu2: 13043 lags 438 cycles > > > > A printout like this would mean that the sync test for cpu2 failed. > > In particular, cpu2's TSC trails cpu0's TSC by at least 438 cycles. > > If this happens for *any* CPU we mark the TSC timecounter as > > defective. > > I think this passes now on my dual-socket Xeon box?
Yes, it passes. The timecounter on your machine should still have a quality of 2000, i.e. we didn't mark it defective. > Full dmesg at the end of the email[1], but just the `tsc:' lines look > like: > > $ grep tsc dmesg.txt > tsc: cpu0: IA32_TSC_ADJUST: -5774382067215574 -> 0 > tsc: cpu1: IA32_TSC_ADJUST: -5774382076335870 -> 0 > tsc: cpu2: IA32_TSC_ADJUST: -5774382073829798 -> 0 > tsc: cpu3: IA32_TSC_ADJUST: -5774382071913818 -> 0 > tsc: cpu4: IA32_TSC_ADJUST: -5774382075956770 -> 0 > tsc: cpu5: IA32_TSC_ADJUST: -5774382074583181 -> 0 > tsc: cpu6: IA32_TSC_ADJUST: -5774382073199574 -> 0 > tsc: cpu7: IA32_TSC_ADJUST: -5774382076500135 -> 0 > tsc: cpu8: IA32_TSC_ADJUST: -5774382074705354 -> 0 > tsc: cpu9: IA32_TSC_ADJUST: -5774382075954945 -> 0 > tsc: cpu10: IA32_TSC_ADJUST: -5774382070567294 -> 0 > tsc: cpu11: IA32_TSC_ADJUST: -5774382075968443 -> 0 > tsc: cpu12: IA32_TSC_ADJUST: -5774382067353478 -> 0 > tsc: cpu13: IA32_TSC_ADJUST: -5774382071926523 -> 0 > tsc: cpu14: IA32_TSC_ADJUST: -5774382074619890 -> 0 > tsc: cpu15: IA32_TSC_ADJUST: -5774382070107058 -> 0 > tsc: cpu16: IA32_TSC_ADJUST: -5774382076196640 -> 0 > tsc: cpu17: IA32_TSC_ADJUST: -5774382075090665 -> 0 > tsc: cpu18: IA32_TSC_ADJUST: -5774382073529646 -> 0 > tsc: cpu19: IA32_TSC_ADJUST: -5774382076443616 -> 0 > tsc: cpu20: IA32_TSC_ADJUST: -5774382074994536 -> 0 > tsc: cpu21: IA32_TSC_ADJUST: -5774382076309520 -> 0 > tsc: cpu22: IA32_TSC_ADJUST: -5774382070947686 -> 0 > tsc: cpu23: IA32_TSC_ADJUST: -5774382073056320 -> 0 Fascinating. Wonder what the heck it's doing down there. > It does look like there's a newer BIOS version for this machine, so I'll > try updating it later today and repeating the test to see if anything > changes. Sure thing, thanks for testing.
