On 15 September 2015 at 11:34, Hans Petter Selasky <[email protected]> wrote: > Hi Adrian, > > On 09/15/15 19:13, Adrian Chadd wrote: >> >> I know all of this. What I'm asking is different - what about the >> change(s) that broke/fixed the Xen network performance actually caused >> the change in behaviour? I know things are sensitive to how the mbufs >> are broken up - I'd like to see exactly this. > > > You need to add statistic counters to the network drivers in question, how > frequently packets are defragged and/or dropped in the TX path to figure > that out. Can we continue this discussion elsewhere?
Sure thing. Yes, maybe having a per-interface histogram of mbuf / segment sizes would be good - something we can run live on a box rather than trying to use dtrace. I wonder how difficult it'd be to slip something in as part of if_transmit and ifnet.. -adrian _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "[email protected]"
