Kernel PLL graphs

[Gary E. Miller]

Yo Hal!

On Mon, 01 Aug 2016 02:40:11 -0700
Hal Murray <hmurray at megapathdsl.net> wrote:

> Here are the before and after graphs:
>   http://users.megapathdsl.net/~hmurray/ntpsec/PPS-kernel.png
> The data is from two separate days so this isn't a clean comparison.
> I don't know what that machine was doing on either day.

I would have expected your non-kernel PLL to be 30x or 100x better.

Even on a RasPi2 I get much better, -400 ᵤSec to +800ᵤSec offset on the
PPS:
    https://pi2.rellim.com/day/#PPS

Are you sure your kernel PPS (RFC 2783) time stamping is working?

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
	gem at rellim.com  Tel:+1 541 382 8588
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