HP ProLiant Server Power Management for Red Hat Enterprise Linux 6.x

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Figure 8: PowerTOP v2.0 output on an idle ProLiant DL360e Gen8 running under RHEL 6.3 with no IPMI service
Firmware bug issue under RHEL 6.x
When booting into RHEL 6.x, a firmware bug message will be logged as shown in Figure 9. The Linux kernel reports that
BIOS occupies the MSR (Model-specific register) address 0x38d. The address represents the fixed-function performance
counter control register (IA32_FIXED_CTR_CTRL) defined in the Intel specification
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. The value 0x330 indicates that
the fixed-function performance counter registers (IA32_FIXED_CTR1 and IA32_FIXED_CTR2) are enabled for all
ring levels.
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Intel® 64 and IA-32 Architectures Software Developer's Manual Volume 3B: System Programming
Guide, Part 2: http://download.intel.com/products/processor/manual/253669.pdf