[ kvm-Bugs-1824398 ] poor/weird performance in sandra (kvm50/acpi/windows)

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Bugs item #1824398, was opened at 2007-11-02 11:50
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Wilson (wilsone)
Assigned to: Nobody/Anonymous (nobody)
Summary: poor/weird performance in sandra (kvm50/acpi/windows)

Initial Comment:
CPU Model: Intel Core 2 Duo Q6600
KVM Version: KVM-50
Host Kernel: Linux 2.6.23.1 
Arch: X86_64
Guest: 32bit Windows XP Sp2 ACPI HAL
QEMU Command line: qemu-system-x86_64 -hda /common/stor2/wxp32acpi.qcow2 -m 512 -net nic,model=rtl8139,macaddr=50:17:99:55:4E:90 -net tap & 
no-kvm: vm won't even boot with -no-kvm

Issue: When doing the CPU benchmarks (arithmetic or multimedia), the system takes a very long time and gives a dodgy result. This doesn't happen with a non-acpi hal vm. 

Sisoft Sandra can be downloaded here:

http://www.sisoftware.co.uk/index.html?dir=dload&location=sware_dl_3264&langx=en&a=


I'm assuming this should be very easy to replicate for anyone running kvm-50 or older with the tpr patch and an acpi hal windows.

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