On Sat, Nov 19, 2011 at 10:20:24AM -0800, Jesse Gross wrote: > We currently use a seqcount to prevent reading partial 64-bit stats > on 32-bit CPUs. u64_stats_sync uses the same logic but elides it on > 64-bit and uniprocessor machines. This improves performance (primarily > on non-x86 architectures) at the cost of not guaranteeing that packet > and byte counts were necessarily read together. > > Suggested-by: Stephen Hemminger <shemmin...@vyatta.com> > Signed-off-by: Jesse Gross <je...@nicira.com>
Acked-by: Ben Pfaff <b...@nicira.com> (These acks are going to look silly going upstream, maybe we should switch to "Looks good." for the datapath :-) I don't see anything that documents how one initializes a u64_stats_sync. I guess all-zero-bits initialization is sufficient, and it looks like percpu data is initially zeroed. _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
