On Wed, Aug 03, 2016 at 02:24:01PM -0700, Hal Murray wrote:
> Time to make sure I've got the right number of negatives... "I have !NO_HZ
> set" means you have unset NO_HZ which probably means you had to build your
> own kernel.
We build our own kernels and we boot our stratum 1 clocks with "no
matthew.sel...@twosigma.com said:
> I'm using maxpoll of 1 on my stratum 1 servers. And I have !NO_HZ set. My
> offsets stay belong 1 microsecond as reported by ntpq. If we switched the
> units to nanoseconds, that might be interesting.
Time to make sure I've got the right number of negatives.
Yo Matthew!
On Wed, 3 Aug 2016 14:49:44 -0400
Matthew Selsky wrote:
> I'm using maxpoll of 1 on my stratum 1 servers. And I have !NO_HZ
> set. My offsets stay belong 1 microsecond as reported by ntpq. If
> we switched the units to nanoseconds, that might be interesting.
chronyc reports to th
On Mon, Aug 01, 2016 at 02:40:11AM -0700, Hal Murray wrote:
>
> There are two parts to PPS processing in the kernel. RFC 2783 describes an
> API for capturing time stamps. RFC 1589 describes a PLL that lives in the
> kernel.
>
> Most Linux distros don't support RFC 1589. The code is in the k
Yo Hal!
On Mon, 01 Aug 2016 02:40:11 -0700
Hal Murray 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
