Yo Richard!
On Sat, 21 Feb 2015 16:59:41 +0100
Richard Cochran <richardcoch...@gmail.com> wrote:
> On Fri, Feb 20, 2015 at 02:45:46PM -0800, Gary E. Miller wrote:
> > BTW, I'm still working on getting LinuxPTP up on my local net. Are
> > there any howto docs? I don't want to use timemaster as I am very
> > picky about my chrony and ntpd configs.
>
> And check the list of supported NICs in the README. Unlike NTP,
> linuxptp can only work with supported hardware, even for software time
> stamping. We do have a number of popular cards, but it also depends
> on the kernel version: the newer, the better.
I guess I got lucky and software timestamping is working for me on
an Intel 80003ES2LAN. It uses the e1000e driver, marked as hardware
supported, but does not have hardware support.
I'm getting 5 uSec jitter between one hardware timing host and one software
time host.
Sadly it would not work on a WiFi port, even though 'ethtool -T' shows
the port supports software timestamping. Is there a better way to tell
what it supported?
I am using kernel 3.19.0.
The supported NICs are a bit pricey, $40 and up, when a nice GigE
card can be $15. I ordered two so I can test a three way hardware
setup.
I have started to add a PTP section to the gpsd time sering howto, but
it will need more.
RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97701
g...@rellim.com Tel:+1(541)382-8588
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