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<blockquote data-quote="stoked" data-source="post: 276406" data-attributes="member: 62266">I should have blogged it or written it down somewhere. I think the biggest gotcha I had for Xen on CentOS was DO NOT install from the packaged ones from the distribution. Compile xen from xen-unstable.hg not the tarball. I'm often on the #xen or #mediaportal irc channels on freenode, but probaby won't be much this week. Otherwise, I'll try and reply in this thread. BTW, I was running into a CPU throttling issue where CPU usage would range from 50-100% usage while streaming HDTV. CPU-Z and other cpu apps showed the CPU constantly switching between 6x and 9x mulitplier. I had to disable SpeedStep and C1E in the Bios before it would stay at 9X. Actually I also hardcoded my CPU multiplier so it may be one or a combination of those things. CPU utilization is now peaking at 19% when streaming HDTV. Hope it saves you some time =D, I was banging my head on that one.PS. The GPL PV drivers unfortunately hide all PCI devices on the same bus as the Realtek virtual nic. My Skystar2 is a Network Device according to windows and is therefore disabled when installing the GPL PV drivers. The author's deciding how to approach this problem but will likely make an exclusion config file so VT-d users can ensure their devices are not disabled.</blockquote>

[QUOTE="stoked, post: 276406, member: 62266"] I should have blogged it or written it down somewhere. I think the biggest gotcha I had for Xen on CentOS was DO NOT install from the packaged ones from the distribution. Compile xen from xen-unstable.hg not the tarball. I'm often on the #xen or #mediaportal irc channels on freenode, but probaby won't be much this week. Otherwise, I'll try and reply in this thread. BTW, I was running into a CPU throttling issue where CPU usage would range from 50-100% usage while streaming HDTV. CPU-Z and other cpu apps showed the CPU constantly switching between 6x and 9x mulitplier. I had to disable SpeedStep and C1E in the Bios before it would stay at 9X. Actually I also hardcoded my CPU multiplier so it may be one or a combination of those things. CPU utilization is now peaking at 19% when streaming HDTV. Hope it saves you some time =D, I was banging my head on that one. PS. The GPL PV drivers unfortunately hide all PCI devices on the same bus as the Realtek virtual nic. My Skystar2 is a Network Device according to windows and is therefore disabled when installing the GPL PV drivers. The author's deciding how to approach this problem but will likely make an exclusion config file so VT-d users can ensure their devices are not disabled. [/QUOTE]

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