diff options
| author |   Steven <sluong@cisco.com> | 2018-05-11 11:06:23 -0700 |
|---|---|---|
| committer |   Damjan Marion <dmarion.lists@gmail.com> | 2018-05-25 11:46:05 +0000 |
| commit | 0d88301a576191a0e330e539cf1dcb3837ee1bf6 (patch) | |
| tree | 2bf42dd2935161d6cdb982371015e94a52d74e62 /src/vppinfra/crc32.h | |
| parent | 0053de63ec4bf8b9bce7817f1b61c9791baf6c26 (diff) | |
bond: performance harvesting
- hash is great. But it is a bit too slow for the DP. Use direct array indexing
to quickly retrieve the slave interface.
- the algorithm used by flow hash is great. But it is a bit too slow for the DP.
Use l2_hash_hash() extracted from lb_hash.h which ECMP is using. It makes use
of intrinsic crc32 instruction set.
- shortcut modulo arithmetic when the operand is 2**x (where x up to 4) to
avoid division instruction.
- special case for link count == 1 in bond_tx_fn()
- use clib_mem_unaligned to access data for the packet to avoid alignment error
- Fix some typos for packet tracing.
Change-Id: I8eae3ad497061c5473aa675ba894ee0211120d25
Signed-off-by: Steven <sluong@cisco.com>
Diffstat (limited to 'src/vppinfra/crc32.h')
| -rw-r--r-- | src/vppinfra/crc32.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/vppinfra/crc32.h b/src/vppinfra/crc32.h index 340b539558e..7361129ed55 100644 --- a/src/vppinfra/crc32.h +++ b/src/vppinfra/crc32.h @@ -23,6 +23,7 @@ #include <x86intrin.h> #define crc32_u64 _mm_crc32_u64 +#define crc32_u32 _mm_crc32_u32 static_always_inline u32 clib_crc32c (u8 * s, int len) @@ -56,6 +57,7 @@ clib_crc32c (u8 * s, int len) #define crc32_u64 __crc32cd +#define crc32_u32 __crc32cw static_always_inline u32 clib_crc32c (u8 * s, int len) |