[Xen-users] Using OHCI to replace UHCI can improve the USB perfo

To:	xen-users@xxxxxxxxxxxxxxxxxxx, qemu-devel@xxxxxxxxxx
Subject:	[Xen-users] Using OHCI to replace UHCI can improve the USB performance dramatically under windows
From:	"Steven Hu" <learn.hu@xxxxxxxxx>
Date:	Thu, 16 Aug 2007 12:57:15 +0800
Delivery-date:	Wed, 15 Aug 2007 21:57:41 -0700
Dkim-signature:	a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=UeSoyT8sYEiBJSCLVhfZj6qqrPvPgar0TIMlC0zcCCK8SQhXoYwJgImaritO+YLpNhXIQQpbKsVCcC6Lsqls8I5oUzuZSyND/J2MRPxaC2CtwvkaYa355oX+mqapFhsn6lTQbQSRfGpF/i2qpXsOJIFAfwaKWU/gbTwGVKPdgm4=
Domainkey-signature:	a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=MUrYrmmz1QfuBOb1IHGLUyfVacXeeUE2g7wd7gFiQxOxVPzAzbhDn/Sm5AVD9YiGEiM1DgJ82TapfCvqpIlFFb6Cmr/OBDpwbWN0fHwmjYeHYCwMav6peOewiUORGebCHPbgHrN27ffsftusjKIADQNFDyq9WzpODFWn0pvjwgU=
Envelope-to:	www-data@xxxxxxxxxxxxxxxxxx
List-help:	<mailto:xen-users-request@lists.xensource.com?subject=help>
List-id:	Xen user discussion <xen-users.lists.xensource.com>
List-post:	<mailto:xen-users@lists.xensource.com>
List-subscribe:	<http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe:	<http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
Sender:	xen-users-bounces@xxxxxxxxxxxxxxxxxxx

Hello, all
Is there anyone interested in the performance of USB under QEMU?
I found that when use OHCI to replace UHCI in qemu, it will improve
the performance of USB storage device.  I have tested it, the
performance is almost equal of a real usb device.
The way to do this is making
little change in the file xen-3.1.0-src/tools/ioemu/hw/pc.c .

--- pc.c.original       2007-08-14 14:04:33.000000000 +0800
+++ pc.c        2007-08-08 08:57:33.000000000 +0800
@@ -897,7 +897,9 @@
        pci_piix4_acpi_init(pci_bus, piix3_devfn + 2);

    if (pci_enabled && usb_enabled) {
-        usb_uhci_init(pci_bus, piix3_devfn + (acpi_enabled ? 3 : 2));
+        //usb_uhci_init(pci_bus, piix3_devfn + (acpi_enabled ? 3 : 2));
+               //usb_ohci_init(pci_bus, 3, -1);
+        usb_ohci_init(pci_bus, 3,piix3_devfn + (acpi_enabled ? 3 : 2));
    }

 #ifndef CONFIG_DM


There are some issues forLinux guest OS. I am trying to fix it. Is

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users

WARNING - OLD ARCHIVES

xen-users

[Xen-users] Using OHCI to replace UHCI can improve the USB performance d