Messages in this thread | | | Date | Tue, 23 Dec 2014 22:42:53 +0100 | From | Richard Cochran <> | Subject | Re: [PATCH net-next 08/11] net: ixgbe: convert to timecounter adjtime. |
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On Tue, Dec 23, 2014 at 01:07:19PM -0800, Jeff Kirsher wrote: > Just for sanity sake, I will have Phillip test the changes, but there is > no need to hold this up from being committed in the mean time.
FYI, here is a test that may show the improved behavior when comparing before/after.
1. Start ptp4l, let it run long enough to find the frequency offset.
2. Stop ptp4l with ^C.
3. Wait a bit, to let the clock drift away.
4. Restart ptp4l, it will now start with the frequency offset learned in step 1.
5. Notice the the offsets in states s0 -> s1 -> s2. There will likely be less offset error with the patches applied.
Thanks, Richard
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