On Tue, 2015-01-13 at 14:05 +0000, David Vrabel wrote: > Always fully coalesce guest Rx packets into the minimum number of ring > slots. Reducing the number of slots per packet has significant > performance benefits (e.g., 7.2 Gbit/s to 11 Gbit/s in an off-host > receive test). > > However, this does increase the number of grant ops per packet which > decreases performance with some workloads (intrahost VM to VM) > /unless/ grant copy has been optimized for adjacent ops with the same > source or destination (see "grant-table: defer releasing pages > acquired in a grant copy"[1]). > > Do we need to retain the existing path and make the always coalesce > path conditional on a suitable version of Xen? > > [1] http://lists.xen.org/archives/html/xen-devel/2015-01/msg01118.html > > Signed-off-by: David Vrabel <david.vra...@citrix.com>
Looks good to me, thanks. Based on that plus the conversation in the other subthread: Acked-by: Ian Campbell <ian.campb...@citrix.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
