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RE: [Qemu-devel] high resolution timer question

From: Arnon Gilboa
Subject: RE: [Qemu-devel] high resolution timer question
Date: Mon, 10 Dec 2007 07:16:00 -0800

The usb host controller emulations in qemu (usb-uhci & usb-ohci) use
QEMUTimer for 1 millisecond timer.
This precise interval is required for generating usb 1.1 frames.
I currently implement usb 2.0 host controller emulation for qemu
It uses QEMUTimer for generating usb 2.0 microframes of 125 microsecond.
This resolution worked precisely only after compiling the host kernel
with high resolution timers and dynamic ticks.

-----Original Message-----
From: address@hidden
[mailto:address@hidden On Behalf Of
Robert Reif
Sent: Monday, December 10, 2007 3:00 PM
To: address@hidden
Subject: [Qemu-devel] high resolution timer question

Writing data to a serial port on the sparc emulation happens
I would like to throttle the write speed to match the actual baud rate. 
What's the best way to do this in qemu?  Will QEMUTimer work for a
1 millisecond timer?

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