[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-users] poor performance of hard disk in Windows DomU with Xen 4.0
Hello I have a PC/Server with 2 Intel E6220 with 16GB ram, running Debian GNU / Linux 6.0 with kernel 2.6.32-5-xen-amd64. Adaptec controller has an ASR-2405 and am using the last module aacraid.ko (version 1.1-7 [28000]-ms) I have a significant drop in disk access performance when virtualizing Windows 2003 32Bit (Xen 4.0) and not if a topic module Xen aacraid.ko or incompatible with the module definition or bad domU I agracere any suggestions of where else to look. Below I detail my confuracion /-- In the controller, I have 4 drives (2 RAID 1) subsystem: Adaptec ASR-2405 \-- In the controller, I have 4 drives (2 RAID 1) /--- The loaded modules are: lsmod | grep ata \--- The loaded modules are:The performance of rad 1 (with two SAS drives) with "hdparm-tT / dev / sdb" is: /dev/sdb: Timing cached reads: 15192 MB in 1.99 seconds = 7636.45 MB/sec Timing buffered disk reads: 434 MB in 3.01 seconds = 144.02 MB/sec In this link you can see the performnce the SAS disk partition, with the parameter phy. http://img96.imageshack.us/img96/7485/discosaswindowsdomu1.jpg In this link you can see that achieves performnce windows 2003 32bit host (native) of the same disk partition SAS http://img838.imageshack.us/img838/7610/discosaswindowshost.jpg The xm dmesg is in the link http://www.fileupyours.com/view/309484/xm_dmesg.txt /---------The domU.cfg is: kernel = '/usr/lib/xen-default/boot/hvmloader' device_model = '/usr/lib64/xen/bin/qemu-dm' builder = 'hvm' maxmen = '9216' memory = '9216' shadow_memory = 87 acpi = 1 apic = 1 pae = 1 vcpus =16 videoram = 16 disk = [ 'phy:/dev/gv_db/vl2,ioemu:hda,w' ,'phy:/dev/gv_db/vl1,ioemu:hdb,w' ,'file:/mnt/domains/atreuco/disco3.img,ioemu:hdc,w' ,'phy:/dev/sdb2,ioemu:hdd,w' ] boot='c' e1000=1 vif = ['type=ioemu, bridge=eth0' ] usb =1 usbdevice = 'host:0925:01003' \---------The domU.cfg is: Thank you for reaching this far down ... Sorry for English, this is google:) _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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