From: Gerd Hoffmann <kraxel@redhat.com>
To: Hans de Goede <hdegoede@redhat.com>
Cc: luo_brian <luo_brian@126.com>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Performance of usb tablet over ehci
Date: Wed, 12 Dec 2012 09:29:20 +0100 [thread overview]
Message-ID: <50C84060.1090105@redhat.com> (raw)
In-Reply-To: <50C7B64B.1010301@redhat.com>
Hi,
> In the end the problem stays that usb uses a polling model versus the
> async interrupt model ps2 uses.
If your guest supports usb 3.0 (aka xhci) you can try that. The
hardware design allows to not poll in the emulation, which brings down
the cpu load even more, should come pretty close to ps/2 mouse levels.
cheers,
Gerd
next prev parent reply other threads:[~2012-12-12 8:38 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-11 19:45 [Qemu-devel] Performance of usb tablet over ehci luo_brian
2012-12-11 22:40 ` Hans de Goede
2012-12-12 8:29 ` Gerd Hoffmann [this message]
2012-12-13 15:25 ` luo_brian
2012-12-13 15:32 ` Gerd Hoffmann
2012-12-19 17:48 ` Hao Luo
2012-12-20 6:54 ` Gerd Hoffmann
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