Hi List, When testing power usage of a windows xp guest using powertop utility, I'm noticing high wakeup rates. The following is the output of powertop for an idle windows xp guest.
============================== =========================== Wakeups-from-idle per second : 2716.6 interval: 10.0s no ACPI power usage estimate available Top causes for wakeups: 52.4% (2434.4) qemu-system-x86 : sys_timer_settime (posix_timer_fn) 21.5% (996.7) qemu-system-x86 : __kvm_migrate_pit_timer (pit_timer_fn) 15.0% (697.4) <interrupt> : extra timer interrupt 4.9% (227.6) <kernel IPI> : Rescheduling interrupts 1.6% ( 72.9) USB device 6-2 : Optical USB Mouse (Logitech) 1.3% ( 61.7) <interrupt> : nvidia 1.3% ( 59.0) <interrupt> : uhci_hcd:usb4, uhci_hcd:usb6, HDA Intel =================================================================== I'm getting similar values when running a Fedora 9 guest. My host is running F9. Details of my /proc/cpuinfo : processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Core(TM)2 Duo CPU T7500 @ 2.20GHz stepping : 10 cpu MHz : 2201.000 cache size : 4096 KB physical id : 0 siblings : 2 core id : 1 cpu cores : 2 fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm ida bogomips : 4387.73 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: The linux image I'm running is Linux localhost.localdomain 2.6.25.4-30.fc9.x86_64 #1 SMP Wed May 21 17:34:18 EDT 2008 x86_64 x86_64 x86_64 GNU/Linux I'm starting my vm using the following command: /usr/local/kvm/bin/qemu-system-x86_64 \ -hda windowsxp.img \ -m 650 \ -localtime \ -net user \ -net nic,model=e1000 \ -smb /home/hsolomon \ -std-vga \ -soundhw all \ -usb \ -usbdevice tablet \ -name StandardPC-NAT & Thanks Haydn -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
