[Xen-devel] Re: Serious performance issues

[Nuutti Kotivuori <naked@xxxxxx>]

Tommi Virtanen wrote:
> Problem #2: bridge setfd/sethello 0 causes timer interrupt storm,
> but does not degrade performance significantly. Workaround is to not
> set such low numbers. Will talk to brctl/bridging maintainers to
> make it more foolproof.

This is really odd. We run a lot of bridges with such settings. Or, to
be specific, for us, 'setfd' is always 0, 'setageing' is either 0 or
300, depending if we want the bridge to act as a 'hub' or not. STP is
always off.

Under these circumstances, we have never seen a timer interrupt
storm. But perhaps it is particular to having STP on.

-- Naked




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