diff options
| author |   Neale Ranns <nranns@cisco.com> | 2020-10-16 14:03:55 +0000 |
|---|---|---|
| committer |   Damjan Marion <dmarion@me.com> | 2020-10-19 14:34:39 +0000 |
| commit | 123b5ebb9816e520d3029146ee233826f4e974bc (patch) | |
| tree | 4fcdc1bb84a8d736d08cefe5f483a93cdbc89553 /src/vnet/ipsec/esp_decrypt.c | |
| parent | 4769ed9c6b85dd3287adc1b725de8a8bed6a5b0e (diff) | |
ipsec: Layout and prefetching of SA struct
Type: improvement
- collect all DP used variables onto 1st or 2nd cache line
- prefetch the 2nd cache line
- in encrypt prefetch the likely location of the trailer.
Signed-off-by: Neale Ranns <nranns@cisco.com>
Change-Id: I44d58f8d2d469ff71a4f4a71578e7cc1acaeba43
Diffstat (limited to 'src/vnet/ipsec/esp_decrypt.c')
| -rw-r--r-- | src/vnet/ipsec/esp_decrypt.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/vnet/ipsec/esp_decrypt.c b/src/vnet/ipsec/esp_decrypt.c index 75092cc9581..ff9fc0c2d37 100644 --- a/src/vnet/ipsec/esp_decrypt.c +++ b/src/vnet/ipsec/esp_decrypt.c @@ -1096,6 +1096,9 @@ esp_decrypt_inline (vlib_main_t * vm, current_sa_index = vnet_buffer (b[0])->ipsec.sad_index; sa0 = pool_elt_at_index (im->sad, current_sa_index); + + /* fetch the second cacheline ASAP */ + CLIB_PREFETCH (sa0->cacheline1, CLIB_CACHE_LINE_BYTES, LOAD); cpd.icv_sz = sa0->integ_icv_size; cpd.iv_sz = sa0->crypto_iv_size; cpd.flags = sa0->flags; |