summaryrefslogtreecommitdiffstats
path: root/src/vnet/ipsec/esp_decrypt.c
diff options
context:
space:
mode:
authorNeale Ranns <nranns@cisco.com>2020-10-16 14:03:55 +0000
committerDamjan Marion <dmarion@me.com>2020-10-19 14:34:39 +0000
commit123b5ebb9816e520d3029146ee233826f4e974bc (patch)
tree4fcdc1bb84a8d736d08cefe5f483a93cdbc89553 /src/vnet/ipsec/esp_decrypt.c
parent4769ed9c6b85dd3287adc1b725de8a8bed6a5b0e (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.c3
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;