On Thu, 2016-02-25 at 15:26 +0100, frank wrote: > > On 02/25/2016 09:01 AM, frank wrote: > > On 02/24/2016 06:23 PM, Keller, Jacob E wrote: > > > > -----Original Message----- > > > > Finally a collegue used the patch below and the problem > > > > vanished(above > > > > test code did run a long time), > > > > however it is unclear if the timestamps produced are still > > > > 'correct' and > > > > useful for ptp. > > > > The fix still looks surprising.. > > > > > > > > kind regards > > > > Frank > > > > > > > This is the work-around I was talking about below. I am surprised > > > it is not in the 4.4 kernel? > > > > > > This is a known hardware errata on some of the parts (I am not > > > sure which ones) and it should have had the workaround pushed > > > upstream. I am guessing your collegue got this from the out-of- > > > tree driver on SourceForge > > Hi, > > > > no, we looked at the 4.4 Code and backported it to 3.19, but our > > testcase still showed the problem. > > Thought "this workaround cannot work if..." and created the patch > > below > > ourselfes. > > Need to check sourceforge.. > > > Hm, the code in e1000e-3.3.3.tar.gz looks like the one in the 4.4 > kernel, so I suspect it will fail > using the testcase too. > > regards > Frank
You can use testptp from Documentation/ptp to perform some sanity checks. Set the clock, wait for a predetermined time and read it. If you modify the program you can even do this within the program to remove human error from the commands. It isn't 100% perfect but it's a good start to make sure things are behaving as expected. Regards, Jake ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
