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ofproto-dpif: Store relevant fields for wildcarding in facet.

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Dynamically determines the flow fields that were relevant in
processing flows based on the OpenFlow flow table and switch
configuration.  The immediate use for this functionality is to
cache action translations for similar flows in facets.  This yields
a roughly 80% improvement in flow set up rates for a complicated
flow table.

More importantly, these wildcards will be used to determine what to
wildcard for the forthcoming kernel wildcard (megaflow) patches
that will allow wildcarding in the kernel, which will provide
significant flow set up improvements.

The approach to tracking fields and caching action translations in
facets was based on an impressive prototype by Ethan Jackson.

Co-authored-by: Ethan Jackson <ethan@nicira.com>
Signed-off-by: Ethan Jackson <ethan@nicira.com>
Signed-off-by: Justin Pettit <jpettit@nicira.com>
This commit is contained in:
Justin Pettit
2013-05-14 18:24:43 -07:00
parent 368eefac37
commit bcd2633a5b
17 changed files with 855 additions and 167 deletions
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2
lib/learn.h
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@@ -21,6 +21,7 @@
struct ds;
struct flow;
struct flow_wildcards;
struct ofpbuf;
struct ofpact_learn;
struct ofputil_flow_mod;
@@ -38,6 +39,7 @@ void learn_to_nxast(const struct ofpact_learn *, struct ofpbuf *openflow);
void learn_execute(const struct ofpact_learn *, const struct flow *,
struct ofputil_flow_mod *, struct ofpbuf *ofpacts);
void learn_mask(const struct ofpact_learn *, struct flow_wildcards *);
void learn_parse(char *, struct ofpbuf *ofpacts);
void learn_format(const struct ofpact_learn *, struct ds *);