Messages in this thread | | | Subject | Re: [Xen-devel] "tcp: refine TSO autosizing" causes performance regression on Xen | From | Eric Dumazet <> | Date | Mon, 13 Apr 2015 06:49:30 -0700 |
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On Mon, 2015-04-13 at 11:56 +0100, George Dunlap wrote:
> Is the problem perhaps that netback/netfront delays TX completion? > Would it be better to see if that can be addressed properly, so that > the original purpose of the patch (fighting bufferbloat) can be > achieved while not degrading performance for Xen? Or at least, so > that people get decent perfomance out of the box without having to > tweak TCP parameters?
Sure, please provide a patch, that does not break back pressure.
But just in case, if Xen performance relied on bufferbloat, it might be very difficult to reach a stable equilibrium : Any small change in stack or scheduling might introduce a significant difference in 'raw performance'.
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