Re: [chrony-users] Hardware timestamping in CentOS 7.4 (was: Possible to get sub-millisecond accuracy?)

On Fri, Jun 23, 2017 at 11:57 AM, Miroslav Lichvar wrote: > That's an interesting idea. Do you think people would prefer SW RX+HW > TX timestamping over SW RX+SW TX? "SW" in this context means kernel timestamps, right? When I sent that email I was thinking it would be nice.

[chrony-users] Root delay and Root dispersion values in `chronyc ntpdata'

I have a setup that looks like the following: GPS Receiver -- PTP --> machine_a -- NTP --> machine_b Where: These machines are all pretty close together (the switching latency between them should be something like 10us). machine_a is running linuxptp and chrony with a shared memory region via

Re: [chrony-users] Hardware timestamping in CentOS 7.4 (was: Possible to get sub-millisecond accuracy?)

On Fri, Jun 23, 2017 at 02:38:26PM -0400, Chris Perl wrote: > On Fri, Jun 23, 2017 at 1:10 PM, Miroslav Lichvar wrote: > > I think we can support it, at least with a new option that would > > disable the filter. I actually have a patch in my queue to allow > > disabling the

Re: [chrony-users] Hardware timestamping in CentOS 7.4 (was: Possible to get sub-millisecond accuracy?)

On Fri, Jun 23, 2017 at 02:49:39PM -0400, Chris Perl wrote: > On Fri, Jun 23, 2017 at 2:43 PM, Miroslav Lichvar wrote: > > It's the patch included in the package from the copr repo. Does it not > > work for you? > > Oh, sorry that wasn't clear to me and I haven't had a

Re: [chrony-users] Hardware timestamping in CentOS 7.4 (was: Possible to get sub-millisecond accuracy?)

On Fri, Jun 23, 2017 at 2:43 PM, Miroslav Lichvar wrote: > It's the patch included in the package from the copr repo. Does it not > work for you? Oh, sorry that wasn't clear to me and I haven't had a chance to test with it yet. Is there something included in the copr repo

Re: [chrony-users] Hardware timestamping in CentOS 7.4 (was: Possible to get sub-millisecond accuracy?)

On Fri, Jun 23, 2017 at 1:10 PM, Miroslav Lichvar wrote: > I think we can support it, at least with a new option that would > disable the filter. I actually have a patch in my queue to allow > disabling the new NTP-specific filter, which should be added in 4.13 > (although

Re: [chrony-users] Hardware timestamping in CentOS 7.4 (was: Possible to get sub-millisecond accuracy?)

On Fri, Jun 23, 2017 at 2:49 PM, Chris Perl wrote: > Is there something included in the copr repo that isn't in the git > repo? I'm not that familiar with copr, but based on what I have read, > I wouldn't think so. > > If not, I'd prefer to just build from git. Assuming