[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-users] XP HVM performance
I recently reinstalled an XP over my xen 3.2.1 (my conf is at the end of the mail). And it's working but I find it a bit (well a big bit ...) too slow and use a lot of CPU. For instance just having a taskmanager running use between 10/15% of CPU as reported by taskmanager and xm top. When I run iozone the CPU usage is almost 95% whereas on a real XP workstation it's only a few percents. The server hosting this XP is a 4 core Xeon E5320 @ 1.86GHz and I have only dom0 with 2 VCPU and 1 VCPU in XP. I know that running XP in XEN will bring a penalty but I wasn't expecting such penalty. Do I miss something ?I also use the latest GPL PV drivers and found with iozone that the throughput is 1/3 of the raw capacity of the disk (as measured in dom0). Does this number seems normal to you or once more am I missing something ? Finally I also did some tests with more than one VCPU but if the whole system load reduced somehow (which is logical) the IO perf where even worse. Is it a good idea to use more than one VCPU in HVM ? my conf: import os, re, time arch = os.uname()[4] if re.search('64', arch): arch_libdir = 'lib64' else: arch_libdir = 'lib' kernel = "/usr/lib/xen-3.2-1/boot/hvmloader" builder='hvm' memory = 512 shadow_memory = 8 name = "ecvssvz01" vif = [ 'bridge=br2' ] disk = [ 'phy:/dev/vg00/xphvm,hda,w','phy:/dev/hdb,hdd:cdrom,r'] device_model = '/usr/' + arch_libdir + '/xen-3.2-1/bin/qemu-dm' boot="d" acpi = 1 apic = 1 sdl=0 vnc=1 usb=1 usbdevice='tablet' rtc_timeoffset=-(time.altzone) localtime=0 vncconsole=0 monitor=1 serial='pty' vncviewer = 0 stdvga=0 vcpus = 1 Matthieu _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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