[PATCH v2 0/4] RSS hash key generation
Vladimir Medvedkin
vladimir.medvedkin at intel.com
Thu Oct 10 14:33:27 CEST 2024
Currently there are 2 methods to get the RSS hash key. The first method is to
randomly generate it. The second one is to use well known RSS hash keys. Both
methods have drawbacks. The first method not always provides a good hash
distribution. The second one does, but not for all ReTa sizes and not for all
traffic types. Additionaly, since these RSS hash keys are well known, they could
potentially be vulnerable to hash-collision DoS attacks.
The proposed API could be used to address both of these issues - the key can be
randomy generated and tailored to specific traffic profile distribution. For
example, if we know that we are receiving flows where source/destination
addresses are fixed or limited to a small quantity, but source port has good
distribution, we could generate an RSS key that will give us good distribution
across our ReTa.
v2
- fix some minor issues
Vladimir Medvedkin (4):
thash: add RSS hash key generation API
hash: add dynamic polynomial calculation
hash: implement RSS hash key generation API
test/thash: add tests for RSS key generation API
app/test/test_thash.c | 108 ++++++++++++
lib/hash/meson.build | 1 +
lib/hash/rte_thash.c | 72 ++++----
lib/hash/rte_thash.h | 37 +++++
lib/hash/rte_thash_gf2_poly_math.c | 253 +++++++++++++++++++++++++++++
lib/hash/version.map | 3 +
6 files changed, 434 insertions(+), 40 deletions(-)
create mode 100644 lib/hash/rte_thash_gf2_poly_math.c
--
2.34.1
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