Hi Dave, Please see my comments in-line below.
Cheers, John > -----Original Message----- > From: Dr. David Alan Gilbert [mailto:[email protected]] > Sent: Monday, February 03, 2014 12:11 PM > To: Ronciak, John > Cc: [email protected] > Subject: Re: [E1000-devel] dual e100 'exec cuc_dump_reset' vs PCI > latency (possibly vs Tulip) > > * Ronciak, John ([email protected]) wrote: > > Some list removed for now > > Hi John, > Thanks for the reply. > > > What do the HW stats for the failing port say? > > Is it receiving what it thinks are packets that a problem in some > way? > > I'm fairly sure they weren't incrementing at all, and I took a tcpdump > that was showing nothing coming from the e100's at that point. > Let me know which counters/debug to collect and I'll be happy to gather > it. Output the stats using 'ethtool -S <ethx>'. Do this before the failure and then again after. You can also get us the stack stats using 'netstat -s'. > > > Is there a way to change the MTU being used on the camera that is > causing the problem? > > The camera doesn't give me much in the way of options (I'm reasonably > sure it's an embedded Linux of some form - but it doesn't let me at it) > If I change the MTU on my end of the link I guess it might follow? It should follow as it's negotiated during the connection set up. So please try that. It would be a good data point. > > > Does moving the problem camera link to the other e100 port work? > > Note that the camera isn't on the e100 port - the camera is on the > Tulip; the PCs that are watching the cameras output are on the e100 > ports, but it's the e100 ports that are stopping, and if I move the PCs > to another tulip port all works fine. So the 2 cameras are on 2 port of the tulip NIC and the 2 e100 ports are connected to other systems directly or to a hub or switch, correct? If you swap the two e100 ports does the problem follow the move or stay on that same port? > > > Does the dmesg show anything else happening when the problem comes > up? > > Nope, nothing else. Ok, let's see what the stats show from above. > > Dave > > -- > -----Open up your eyes, open up your mind, open up your code ------- > / Dr. David Alan Gilbert | Running GNU/Linux | Happy \ > \ gro.gilbert @ treblig.org | | In Hex / > \ _________________________|_____ http://www.treblig.org |_______/ ------------------------------------------------------------------------------ Managing the Performance of Cloud-Based Applications Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. Read the Whitepaper. http://pubads.g.doubleclick.net/gampad/clk?id=121051231&iu=/4140/ostg.clktrk _______________________________________________ E1000-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
