-----Original Message----- From: Justin Piszcz [mailto:[email protected]] Sent: Tuesday, October 09, 2012 6:15 PM To: [email protected]; [email protected] Cc: [email protected]; [email protected] Subject: X9SCM-F/82574L/e1000e lag / high latency (e1000e/Intel bug)
If you have > 16GB do not upgrade to 2.0b, I am writing up a page on this and will post it shortly, the board will show 32GB with 2.0b but when it tries to address it, the machine reboots. Stick with 2.0a for now, I will call Supermicro later, will post a page on all of these issues in a bit. -- As promised: https://sites.google.com/a/lucidpixels.com/web/blog/supermicrox9scm-fissues Summary: 1. the board does not always address 32GB of ram if you are using an Ivy Bridge chip on this motherboard 2. e1000e network problems a) During heavy network I/O (file copy) on eth0 the network latency jumps to 300-1000ms+ every 4-5 seconds (it does not do this on a separate card) b) During heavy network I/O (file copy) of over 600GB of files, the kernel disabled the network IRQ on eth0 and took the server offline from a network perspective (it has not done this on a separate card..yet) 3. Problems with PCI-e cards summary: Don't expect to use all four PCI-e slots if they use a lot of power 4. clock drift issues: summary: expect some strangeness if you use gpsd/a gps to help sync your time, due to what SM noted below http://lists.ntp.org/pipermail/pool/2012-July/006019.html here is a picture of memtest86 showing "Unexpected Interrupt - Halting" when 2.0b BIOS is used with 32gb of ram: http://home.comcast.net/~jpiszcz/20121010/x9scm-web-small.jpg here is the issue with memtest86 (crashes/reboots host when you have 2.0b + 32gb of ram): https://www.youtube.com/watch?feature=player_embedded&v=M2TWO5kFm9U Justin. ------------------------------------------------------------------------------ Don't let slow site performance ruin your business. Deploy New Relic APM Deploy New Relic app performance management and know exactly what is happening inside your Ruby, Python, PHP, Java, and .NET app Try New Relic at no cost today and get our sweet Data Nerd shirt too! http://p.sf.net/sfu/newrelic-dev2dev _______________________________________________ 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
