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dpif-netdev: implement subtable lookup validation.

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This commit refactors the existing dpif subtable function pointer
infrastructure, and implements an autovalidator component.

The refactoring of the existing dpcls subtable lookup function
handling, making it more generic, and cleaning up how to enable
more implementations in future.

In order to ensure all implementations provide identical results,
the autovalidator is added. The autovalidator itself implements
the subtable lookup function prototype, but internally iterates
over all other available implementations. The end result is that
testing of each implementation becomes automatic, when the auto-
validator implementation is selected.

Signed-off-by: Harry van Haaren <harry.van.haaren@intel.com>
Acked-by: William Tu <u9012063@gmail.com>
Signed-off-by: Ian Stokes <ian.stokes@intel.com>
This commit is contained in:
Harry van Haaren
2020-07-13 13:42:10 +01:00
committed by Ian Stokes
parent fa31efd211
commit e90e115a01
9 changed files with 322 additions and 24 deletions
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15
lib/dpif-netdev-private.h
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@@ -60,21 +60,6 @@ uint32_t (*dpcls_subtable_lookup_func)(struct dpcls_subtable *subtable,
const struct netdev_flow_key *keys[],
struct dpcls_rule **rules);
/* Prototype for generic lookup func, using generic scalar code path. */
uint32_t
dpcls_subtable_lookup_generic(struct dpcls_subtable *subtable,
uint32_t keys_map,
const struct netdev_flow_key *keys[],
struct dpcls_rule **rules);
/* Probe function to select a specialized version of the generic lookup
* implementation. This provides performance benefit due to compile-time
* optimizations such as loop-unrolling. These are enabled by the compile-time
* constants in the specific function implementations.
*/
dpcls_subtable_lookup_func
dpcls_subtable_generic_probe(uint32_t u0_bit_count, uint32_t u1_bit_count);
/* A set of rules that all have the same fields wildcarded. */
struct dpcls_subtable {
/* The fields are only used by writers. */