On Fri, 2013-09-20 at 20:51 -0700, Ben Greear wrote: > We have been seeing across-the-board network performance issues > with the E5 2643 v/s an I7-980. > We've been trying ixgbe, igb, and 'veth' virtual devices. > > Driven by user space or pktgen, the E5 is usually slower by > a noticeable bit. We did disable the VTD BIOS thing that really > kills performance, but perhaps there are other BIOS things we > should tune in the E5 system? > > We tried various kernels back to about 3.0 and the general > slowness remains. > > Has anyone done similar comparisons and seen issues?
If I'm not mistaken, the E5 has a lower max frequency than the desktop parts. What I suspect is you're seeing your workloads physically run faster on the I7 due to turbo pushing the core past 3 GHz, but the E5 I think hovers in the 2.5-3.0 range. Other factors could be how memory is populated in both systems. Are you sure all channels are populated in both systems? This is just some of the quick low-hanging fruit I can think of now. Cheers, -PJ ------------------------------------------------------------------------------ LIMITED TIME SALE - Full Year of Microsoft Training For Just $49.99! 1,500+ hours of tutorials including VisualStudio 2012, Windows 8, SharePoint 2013, SQL 2012, MVC 4, more. BEST VALUE: New Multi-Library Power Pack includes Mobile, Cloud, Java, and UX Design. Lowest price ever! Ends 9/22/13. http://pubads.g.doubleclick.net/gampad/clk?id=64545871&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
