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2015-03-06 Thread drasko . draskovic
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Re: [Linuxptp-devel] Limited success with hardware PTP

2015-03-06 Thread Gary E. Miller
Yo Miroslav! On Fri, 6 Mar 2015 12:45:50 +0100 Miroslav Lichvar wrote: > On Wed, Mar 04, 2015 at 12:16:48PM -0800, Gary E. Miller wrote: > > Which still leaves me with slave PHC clocks that either go crazy or > > have huge offsets... > > Another thought, is it possible that the PTP master is us

Re: [Linuxptp-devel] [PATCH RFC 0/6] Improve accuracy with software timestamping

2015-03-06 Thread Miroslav Lichvar
On Fri, Mar 06, 2015 at 04:05:08PM +0100, Richard Cochran wrote: > There are really two issues: > > 1. The filter algorithm itself. > 2. How the new filter fits into the SW design. > > Although I am not convinced about #1 Not convinced that the raw offset should be sent to the servo when the num

Re: [Linuxptp-devel] [PATCH RFC 0/6] Improve accuracy with software timestamping

2015-03-06 Thread Richard Cochran
On Fri, Mar 06, 2015 at 12:49:51PM +0100, Miroslav Lichvar wrote: > > Any comments on this or other suggestions? I want to put this on hold until I have a chance to really test your scheme. There are really two issues: 1. The filter algorithm itself. 2. How the new filter fits into the SW desig

Re: [Linuxptp-devel] [PATCH RFC 0/6] Improve accuracy with software timestamping

2015-03-06 Thread Miroslav Lichvar
On Mon, Feb 23, 2015 at 11:36:34AM +0100, Miroslav Lichvar wrote: > On Sun, Feb 22, 2015 at 07:16:12PM +0100, Richard Cochran wrote: > > - expand the servo/filter APIs to include all of the parameters you > > will need. > > Like this? > > servo_sample(offset, local, weight, raw_offset, raw_dela

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

2015-03-06 Thread Miroslav Lichvar
On Wed, Mar 04, 2015 at 12:16:48PM -0800, Gary E. Miller wrote: > Which still leaves me with slave PHC clocks that either go crazy or have > huge offsets... Another thought, is it possible that the PTP master is using HW timestamping with a PTP clock that is not synchronized to anything? If it was