[Bug 256781] EC2 Nitro: TSC-low timecounter lags

2021-06-26 Thread bugzilla-noreply
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256781 --- Comment #4 from martin.stoya...@vertalo.com --- Created attachment 226069 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=226069&action=edit dmesg.boot -- You are receiving this mail because: You are the assignee for the bug.

[Bug 256781] EC2 Nitro: TSC-low timecounter lags

2021-06-26 Thread bugzilla-noreply
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256781 --- Comment #5 from martin.stoya...@vertalo.com --- (In reply to Colin Percival from comment #3) I get this behavior with t3 and t3a instances. -- You are receiving this mail because: You are the assignee for the bug.

[Bug 256781] EC2 Nitro: TSC-low timecounter lags

2021-06-26 Thread bugzilla-noreply
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256781 --- Comment #6 from Colin Percival --- It's possible that this is a problem with "stolen" CPU time. Martin: Is the EC2 "CPU credit balance" positive on that instance? -- You are receiving this mail because: You are the assignee for the b

[Bug 256781] EC2 Nitro: TSC-low timecounter lags

2021-06-26 Thread bugzilla-noreply
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256781 --- Comment #7 from martin.stoya...@vertalo.com --- Created attachment 226072 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=226072&action=edit cpu utilization and credit balance graphs -- You are receiving this mail because: Yo

[Bug 256781] EC2 Nitro: TSC-low timecounter lags

2021-06-26 Thread bugzilla-noreply
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256781 --- Comment #8 from martin.stoya...@vertalo.com --- (In reply to Colin Percival from comment #6) Yes, it is positive, the instance isn't very loaded, and also the same thing happens even if I just let it sit after it starts up. By the time

[Bug 256781] EC2 Nitro: TSC-low timecounter lags

2021-06-26 Thread bugzilla-noreply
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256781 --- Comment #9 from Colin Percival --- Hmm, very strange. I can't reproduce this. Which EC2 region are you in? Have you tried other regions? It's possible that AWS is rolling out a change which breaks things. -- You are receiving this

[Bug 256781] EC2 Nitro: TSC-low timecounter lags

2021-06-26 Thread bugzilla-noreply
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256781 --- Comment #10 from martin.stoya...@vertalo.com --- I am using the us-east-1 region. -- You are receiving this mail because: You are the assignee for the bug.

[Bug 256781] EC2 Nitro: TSC-low timecounter lags

2021-06-26 Thread bugzilla-noreply
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256781 --- Comment #11 from Colin Percival --- Ok, that's where I was testing too... have you tried all the different AZs? -- You are receiving this mail because: You are the assignee for the bug.

[Bug 256781] EC2 Nitro: TSC-low timecounter lags

2021-06-26 Thread bugzilla-noreply
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256781 --- Comment #12 from martin.stoya...@vertalo.com --- I think all my tests were in us-east-1a, I don't think I have tested other AZs -- You are receiving this mail because: You are the assignee for the bug.

[Bug 256781] EC2 Nitro: TSC-low timecounter lags

2021-06-26 Thread bugzilla-noreply
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256781 --- Comment #13 from Colin Percival --- Can you try other AZs, and also tell me if running something CPU intensive (say, 'dd if=/dev/random | sha256') changes how fast the clock runs? -- You are receiving this mail because: You are the as

[Bug 256781] EC2 Nitro: TSC-low timecounter lags

2021-06-26 Thread bugzilla-noreply
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256781 --- Comment #14 from Colin Percival --- Also, what does `sysctl kern.timecounter` say? -- You are receiving this mail because: You are the assignee for the bug.