[Xen-devel] Timer and dynamic tick

To:	xen <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject:	[Xen-devel] Timer and dynamic tick
From:	Marco Tizzoni <marco.tizzoni@xxxxxxxxx>
Date:	Thu, 10 Dec 2009 22:57:07 +0100
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Hello,
sorry for cross-posting but probably devel it's more appropriate.

I'd understand if setting CONFIG_NO_HZ=y in dom0/domU is required/suggested.

Because Xen supports no-tick-on-idle mechanism (http://virt.kernelnewbies.org/ParavirtBenefits#head-360a0849a0639297396542dddcc691e4100287ab) ticks come from the hypervisor only when needed by the guest so, in my understanding, setting CONFIG_NO_HZ=n will make no difference. Any comments?

Regards,
Marco

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[Xen-devel] Timer and dynamic tick