From: Max Krasnyansky <maxk@kernel.org>
To: qemu-devel@nongnu.org, kvm@vger.kernel.org
Subject: EHCI (usb 2.0) support
Date: Fri, 05 Sep 2008 22:54:00 -0700 [thread overview]
Message-ID: <48C21AF8.3040803@kernel.org> (raw)
With my latest USB patches, that I just sent out, UHCI support is probably as
good as it gets. I tested all kinds of devices with Linux and XP guests and
things are solid.
Host USB is now fully async and I do not see any delays/jerkiness anymore.
However, overall performance can certainly be improved by supporting EHCI (ie
usb-2.0 stuff). For example native performance of an external USB hard drive
is ~28MB/sec (measured with hdparm). The same drive attached to the Linux
guest gives me about 500KB/sec. Huge difference.
So I'm going to start working on EHCI (starting tomorrow). If somebody has any
EHCI code I can use let me know.
Max
WARNING: multiple messages have this Message-ID (diff)
From: Max Krasnyansky <maxk@kernel.org>
To: qemu-devel@nongnu.org, kvm@vger.kernel.org
Subject: [Qemu-devel] EHCI (usb 2.0) support
Date: Fri, 05 Sep 2008 22:54:00 -0700 [thread overview]
Message-ID: <48C21AF8.3040803@kernel.org> (raw)
With my latest USB patches, that I just sent out, UHCI support is probably as
good as it gets. I tested all kinds of devices with Linux and XP guests and
things are solid.
Host USB is now fully async and I do not see any delays/jerkiness anymore.
However, overall performance can certainly be improved by supporting EHCI (ie
usb-2.0 stuff). For example native performance of an external USB hard drive
is ~28MB/sec (measured with hdparm). The same drive attached to the Linux
guest gives me about 500KB/sec. Huge difference.
So I'm going to start working on EHCI (starting tomorrow). If somebody has any
EHCI code I can use let me know.
Max
next reply other threads:[~2008-09-06 5:54 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-06 5:54 Max Krasnyansky [this message]
2008-09-06 5:54 ` [Qemu-devel] EHCI (usb 2.0) support Max Krasnyansky
2008-09-07 6:31 ` Arnon Gilboa
2008-09-07 6:31 ` Arnon Gilboa
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