[Qemu-devel] vl.c:main_loop() non-blocking TCG optimization still useful?

[Stefan Hajnoczi]

Hi Jan,
In 2011 the following patch was merged to optimize I/O vs vcpu scheduling:

commit c9f711a5d31e22dac932c1c01e9c0f97caff0988
Author: Jan Kiszka <jan.kis...@siemens.com>
Date:   Mon Aug 22 17:46:02 2011 +0200

    Poll main loop after I/O events were received

This was back in the days of CONFIG_IOTHREAD.  Things have changed
quite a bit since then.

Do you think the last_io/non-blocking trick is still needed today in TCG?

Thanks,
Stefan