Posts Tagged ‘opteron 6100’

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VMware Management Assistant Panics on Magny Cours

August 11, 2010

VMware’s current version of its vSphere Management Assistant – also known as vMA (pronounced “vee mah”) – will crash when run on an ESX host using AMD Magny Cours processors. This behavior was discovered recently when installing the vMA on an AMD Opteron 6100 system (aka. Magny Cours) causing a “kernel panic” on boot after deploying the OVF template. Something of note is the crash also results in 100% vCPU utilization until the VM is either powered-off or reset:

vMA Kernel Panic on Import

vMA Kernel Panic on Import

As it turns out, no manner of tweaks to the virtual machine’s virtualization settings nor OS boot/grub settings (i.e. noapic, etc.) seem to cure the ills for vMA. However, we did discover that the OVF deployed appliance was configured as a VMware Virtual Machine Hardware Version 4 machine:

vMA 4.1 defaults to Hardware Version 4

vMA 4.1 defaults to Virtual Machine Hardware Version 4

Since our lab vMA deployments have all been upgraded to Virtual Machine Harware Version 7 for some time (and for functional benefits as well), we tried to update the vMA to Version 7 and try again:

Upgrade vMA Virtual Machine Version...

Upgrade vMA Virtual Machine Version...

This time, with Virtual Hardware Version 7 (and no other changes to the VM), the vMA boots as it should:

vMA Booting after Upgrade to Virtual Hardware Version 7

vMA Booting after Upgrade to Virtual Hardware Version 7

Since the Magny Cours CPU is essentially a pair of tweaked 6-core Opteron CPUs in a single package, we took the vMA into the lab and deployed it to an ESX server running on AMD 2435 6-core CPUs: the vMA booted as expected, even with Virtual Hardware Version 4. A quick check of the community and support boards show a few issues with older RedHat/Centos kernels (like vMA’s) but no reports of kernel panic with Magny Cours. Perhaps there are just not that many AMD Opteron 6100 deployments out there with vMA yet…

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vSphere 4 Update 2 Released

June 11, 2010

VMware vSphere 4, Update 2 has been released with the following changes to ESXi:

The following information provides highlights of some of the enhancements available in this release of VMware ESXi:

  • Enablement of Fault Tolerance Functionality for Intel Xeon 56xx Series processors— vSphere 4.0 Update 1 supports the Intel Xeon 56xx Series processors without Fault Tolerance. vSphere 4.0 Update 2 enables Fault Tolerance functionality for the Intel Xeon 56xx Series processors.
  • Enablement of Fault Tolerance Functionality for Intel i3/i5 Clarkdale Series and Intel Xeon 34xx Clarkdale Series processors— vSphere 4.0 Update 1 supports the Intel i3/i5 Clarkdale Series and Intel Xeon 34xx Clarkdale Series processors without Fault Tolerance. vSphere 4.0 Update 2 enables Fault Tolerance functionality for the Intel i3/i5 Clarkdale Series and Intel Xeon 34xx Clarkdale Series processors.
  • Enablement of IOMMU Functionality for AMD Opteron 61xx and 41xx Series processors— vSphere 4.0 Update 1 supports the AMD Opteron 61xx and 41xx Series processors without input/output memory management unit (IOMMU). vSphere 4.0 Update 2 enables IOMMU functionality for the AMD Opteron 61xx and 41xx Series processors.
  • Enhancement of the resxtop utility— vSphere 4.0 U2 includes an enhancement of the performance monitoring utility, resxtop. The resxtop utility now provides visibility into the performance of NFS datastores in that it displays the following statistics for NFS datastores: Reads/swrites/sMBreads/sMBwrtn/scmds/sGAVG/s (guest latency).
  • Additional Guest Operating System Support— ESX/ESXi 4.0 Update 2 adds support for Ubuntu 10.04. For a complete list of supported guest operating systems with this release, see the VMware Compatibility Guide.

Resolved Issues In addition, this release delivers a number of bug fixes that have been documented in theResolved Issues section.

ESXi 4 Update 2 Release Notes

Noted in the release is the official support for AMD’s IOMMU in Opteron 6100 and 4100 processors – available in 1P, 2P and 4P configurations. This finally closes the (functional) gap between AMD Opteron and Intel’s Nehalem line-up. Likewise, FT support for many new Intel processors has been added. Also, the addition of NFS performance counters in ESXTop will make storage troubleshooting a bit easier. Grab you applicable update at VMware’s download site now (SnS required.)