Re: [Linuxptp-users] Wildly jumping offsets casued by phc2sys

[Keller, J. E <jac...@in...>]

Ah. I was about to forward you to Yanir when I saw this email. I believe
the e1000e team is currently working on validating a release that can be
put on sourceforge which will include this fix.

Regards,
Jake

On Mon, 2015-06-01 at 10:42 -0500, Robb wrote:
> Yanir at:
> https://sourceforge.net/p/e1000/mailman/message/34158396/
> was able to help me with this problem.
> 
> He provided me with a patch to get this working.
> I have tested it and it has been working for > hour with
> no errors!
> 
> Here is a the patch + what I did in case it helps anyone else.
> 
> wget -O e1000e-3.1.0.2.tar.gz
> "http://sourceforge.net/projects/e1000/files/e1000e%20stable/3.1.0.2/e1000e-3.1.0.2.tar.gz/download"
> tar xvf e1000e-3.1.0.2.tar.gz
> cd e1000e-3.1.0.2/src; patch < ../../fix_systim_issues-3.1.0.2.patch
> sudo make install
> 
> $ cat fix_systim_issues-3.1.0.2.patch
> --- netdev.c.orig 2015-06-01 16:49:37.802312304 +0300
> +++ netdev.c 2015-06-01 16:51:19.468306452 +0300
> @@ -4614,7 +4614,10 @@ static cycle_t e1000e_cyclecounter_read(
>   cycle_t systim, systim_next;
> 
>   /* latch SYSTIMH on read of SYSTIML */
> - systim = (cycle_t)er32(SYSTIML);
> + u32 systim_overflow_latch_fix = 0x3FFFFFFF;
> + do {
> + systim = (cycle_t)er32(SYSTIML);
> + } while (systim > systim_overflow_latch_fix);
>   systim |= (cycle_t)er32(SYSTIMH) << 32;
> 
>   if ((hw->mac.type == e1000_82574) || (hw->mac.type == e1000_82583)) {
> 
> 
> 
> I apologize, my email composer (gmail) seems to delete the tabs in the patch.
> 
> 
> 
> On Sat, May 30, 2015 at 12:11 AM, Richard Cochran
> <ric...@gm...> wrote:
> > On Fri, May 29, 2015 at 04:59:29PM -0500, Robb wrote:
> >> For whatever reason phc2sys seems to be blowing up the offsets.
> >>
> >> My set up is as follows:
> >>
> >> Two CentOS 6.5 machines
> >> 2.6.32-504.16.2.el6.x86_64
> >> linuxptp-1.3-1.el6.x86_64
> >>
> >> Machine1 eth1 [igb    5.0.5-k]    Intel I210 (rev 03)
> >> Machine2 eth0 [e1000e 2.3.2-k] Intel I217-LM (rev 05)
> >
> > The I217-LM has a known HW bug.
> >
> >> I have read that there was some problems with the e1000e driver so I tried with
> >> the 3.1.0.2-NAPI version, but still have the same problem as above.
> >>
> >> Does anyone have any ideas what could be the problem here?
> >
> > This isn't a driver problem but rather a HW bug.  I don't have that HW,
> > and I have not yet heard of any SW (driver) work arounds.  You might
> > ask on the e1000e list if Intel has a solution to this problem.
> >
> > Thanks,
> > Richard
> 
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