On Wed, Jun 06, 2012 at 10:06:11PM +0200, Eric Dumazet wrote: > On Wed, 2012-06-06 at 21:43 +0300, Michael S. Tsirkin wrote: > > > 1. We are trying to look at counters for purposes of tuning the device. > > E.g. if ethtool reports packets and bytes, we'd like to calculate > > average packet size by bytes/packets. > > > > If both counters are read atomically the metric becomes more exact. > > Not a must but nice to have. > > > > metrics are exact right now.
Yes, but they are not synchronised between themselves. E.g. you can in theory have a report where #of packets > #of bytes. I know there's no guarantee they are synchronised on an arbitrary device but if they are, without slowing fast path, it's nice. _______________________________________________ Virtualization mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/virtualization
