[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Qemu-devel] [5578] Increase default IO timeout from 10ms to 5s

From: Anthony Liguori
Subject: Re: [Qemu-devel] [5578] Increase default IO timeout from 10ms to 5s
Date: Fri, 31 Oct 2008 15:13:21 -0500
User-agent: Thunderbird (X11/20080925)

Jamie Lokier wrote:
Anthony Liguori wrote:
With this patch, I see the number of wake-ups with an idle dynamic
ticks guest drop from 80 per second to about 15 times per second.

That's great, it really is, but shouldn't it be less than that?

Did you look at the wakeup rate shown by powertop in the guest, to see
how many extra wakeups are caused by QEMU internals?

I don't have a guest handy that I could run powertop on, but I know of at least a few timers that can be gotten rid of (like the rtc timers).


Anthony Liguori

-- Jamie

reply via email to

[Prev in Thread] Current Thread [Next in Thread]