Re: [Linuxptp-devel] Limited success with hardware PTP

2015-03-04 Thread Gary E. Miller
Yo Miroslav! On Wed, 4 Mar 2015 09:24:33 +0100 Miroslav Lichvar mlich...@redhat.com wrote: On Tue, Mar 03, 2015 at 11:44:47AM -0800, Gary E. Miller wrote: Miroslav Lichvar mlich...@redhat.com wrote: On Tue, Mar 03, 2015 at 12:38:41AM -0800, Gary E. Miller wrote: First, why does chronyd

Re: [Linuxptp-devel] Limited success with hardware PTP

2015-03-04 Thread Dale Smith
Greetings, Just a pure shot in the dark, but how wide is your PPS pulse? It wouldn't be 80mS would it? Like you are syncing to the trailing edge instead of the leading edge? -Dale On Mon, Mar 2, 2015 at 9:54 PM, Gary E. Miller g...@rellim.com wrote: Yo Gary! On Mon, 2 Mar 2015 15:39:23

Re: [Linuxptp-devel] Limited success with hardware PTP

2015-03-04 Thread Miroslav Lichvar
On Tue, Mar 03, 2015 at 11:44:47AM -0800, Gary E. Miller wrote: Miroslav Lichvar mlich...@redhat.com wrote: On Tue, Mar 03, 2015 at 12:38:41AM -0800, Gary E. Miller wrote: First, why does chronyd not support uSec SHM? (I usually use the SOCK) It does support both microsecond and

Re: [Linuxptp-devel] Limited success with hardware PTP

2015-03-03 Thread Miroslav Lichvar
Miroslav Lichvar mlich...@redhat.com wrote: The default precision of the SHM refclock in chrony is 1 microsecond, it won't report jitter smaller than that. Add precision 1e-9 to the SHM line in your chrony.conf to fix that. Ah, that explains a lot. Will that fix the jitter computation?

Re: [Linuxptp-devel] Limited success with hardware PTP

2015-03-03 Thread Miroslav Lichvar
On Tue, Mar 03, 2015 at 12:38:41AM -0800, Gary E. Miller wrote: Ah, that explains a lot. Will that fix the jitter computation? Yes, the +/- value in the chronyc sources output should be smaller than 1 us now. It's mostly a cosmetic issue, it likely won't have any noticeable effect on

Re: [Linuxptp-devel] Limited success with hardware PTP

2015-03-03 Thread Gary E. Miller
Yo Miroslav! On Tue, 3 Mar 2015 09:31:58 +0100 Miroslav Lichvar mlich...@redhat.com wrote: Miroslav Lichvar mlich...@redhat.com wrote: The default precision of the SHM refclock in chrony is 1 microsecond, it won't report jitter smaller than that. Add precision 1e-9 to the SHM line in

Re: [Linuxptp-devel] Limited success with hardware PTP

2015-03-03 Thread Gary E. Miller
Yo Miroslav! On Tue, 3 Mar 2015 10:28:37 +0100 Miroslav Lichvar mlich...@redhat.com wrote: On Tue, Mar 03, 2015 at 12:38:41AM -0800, Gary E. Miller wrote: Ah, that explains a lot. Will that fix the jitter computation? Yes, the +/- value in the chronyc sources output should be

Re: [Linuxptp-devel] Limited success with hardware PTP

2015-03-02 Thread Gary E. Miller
Yo Miroslav! On Fri, 27 Feb 2015 07:48:09 +0100 Miroslav Lichvar mlich...@redhat.com wrote: One other tidbit is that I210 supports EEE, which can affect jitter, although I wouldn't expect it on that level. You can try turning this off via ethtool (ethtool --set-eee ethX eee off) to

Re: [Linuxptp-devel] Limited success with hardware PTP

2015-03-02 Thread Gary E. Miller
Yo Matthew! On Thu, 26 Feb 2015 21:16:21 + Vick, Matthew matthew.v...@intel.com wrote: One other tidbit is that I210 supports EEE, which can affect jitter, although I wouldn't expect it on that level. You can try turning this off via ethtool (ethtool --set-eee ethX eee off) to see if that

Re: [Linuxptp-devel] Limited success with hardware PTP

2015-03-02 Thread Keller, Jacob E
On Mon, 2015-03-02 at 15:39 -0800, Gary E. Miller wrote: Yo Matthew! On Thu, 26 Feb 2015 21:16:21 + Vick, Matthew matthew.v...@intel.com wrote: One other tidbit is that I210 supports EEE, which can affect jitter, although I wouldn't expect it on that level. You can try turning this

Re: [Linuxptp-devel] Limited success with hardware PTP

2015-02-26 Thread Miroslav Lichvar
On Thu, Feb 26, 2015 at 01:31:33PM -0800, Gary E. Miller wrote: This is the I210: #x SHM2 0 4 377 8 -212ms[ -212ms] +/- 1000ns This is a local reference clock over NTP ^* spidey.rellim.com 1 8 377 135+10us[ +14us] +/- 182us

Re: [Linuxptp-devel] Limited success with hardware PTP

2015-02-26 Thread Vick, Matthew
On 2/26/15, 12:08 PM, Gary E. Miller g...@rellim.com wrote: Yo Richard! On Thu, 26 Feb 2015 10:08:05 +0100 Richard Cochran richardcoch...@gmail.com wrote: On Thu, Feb 26, 2015 at 12:18:48AM -0800, Gary E. Miller wrote: So the three I have on the recommmended list are not good? Yeah, I

Re: [Linuxptp-devel] Limited success with hardware PTP

2015-02-25 Thread Keller, Jacob E
Hi, On Wed, 2015-02-25 at 16:48 -0800, Gary E. Miller wrote: Yo Jacob E! On Thu, 26 Feb 2015 00:32:27 + Keller, Jacob E jacob.e.kel...@intel.com wrote: Yea, in general all you really want is HWTSTAMP_FILTER_ALL, it's a much better implementation. So what is the minimmum for