diff options
| author |   Andrew Yourtchenko <ayourtch@gmail.com> | 2018-06-21 13:45:37 +0200 |
|---|---|---|
| committer |   Dave Barach <openvpp@barachs.net> | 2018-06-27 11:46:50 +0000 |
| commit | 2d11e9f4b9e22f6da17fbe83b99e4ca9a5c0e507 (patch) | |
| tree | 37def8d4d06296b0aee78a471484c8edf9501fe6 /src/plugins/acl | |
| parent | 2e0798f90d9672b1c8dc702a2bdae485a6771ff8 (diff) | |
acl-plugin: tm: avoid hash calculation dependency on a memory store operation
A small store into a middle of a larger structure that was subsequently
loaded for calculating the bihash key was noticeably impacting the performance.
Change-Id: If7f33e1b66e8b438ba7cc91abc0ca749850c6e45
Signed-off-by: Andrew Yourtchenko <ayourtch@gmail.com>
Diffstat (limited to 'src/plugins/acl')
| -rw-r--r-- | src/plugins/acl/public_inlines.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/plugins/acl/public_inlines.h b/src/plugins/acl/public_inlines.h index ca4251903fa..576d081784c 100644 --- a/src/plugins/acl/public_inlines.h +++ b/src/plugins/acl/public_inlines.h @@ -605,7 +605,15 @@ multi_acl_match_get_applied_ace_index (acl_main_t * am, int is_ip6, fa_5tuple_t *pkey++ = *pmatch++ & *pmask++; *pkey++ = *pmatch++ & *pmask++; - kv_key->pkt.mask_type_index_lsb = mask_type_index; + /* + * The use of temporary variable convinces the compiler + * to make a u64 write, avoiding the stall on crc32 operation + * just a bit later. + */ + fa_packet_info_t tmp_pkt = kv_key->pkt; + tmp_pkt.mask_type_index_lsb = mask_type_index; + kv_key->pkt.as_u64 = tmp_pkt.as_u64; + int res = clib_bihash_search_inline_2_48_8 (&am->acl_lookup_hash, &kv, &result); |