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bgpd: Optimize the path for suppressed announcements

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If supress-duplicates is turned of (which is turned on by default), do not
calculate attribute hash key, that consumes CPU quite a lot.

Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>
This commit is contained in:
Donatas Abraitis 2024-03-26 13:19:17 +02:00
parent 0b1af4c918
commit 59571fd14b
1 changed files with 6 additions and 4 deletions
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10
bgpd/bgp_updgrp_adv.c
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@ -532,7 +532,7 @@ bool bgp_adj_out_set_subgroup(struct bgp_dest *dest,
struct peer *adv_peer; struct peer *adv_peer;
struct peer_af *paf; struct peer_af *paf;
struct bgp *bgp; struct bgp *bgp;
uint32_t attr_hash = attrhash_key_make(attr); uint32_t attr_hash = 0;
peer = SUBGRP_PEER(subgrp); peer = SUBGRP_PEER(subgrp);
afi = SUBGRP_AFI(subgrp); afi = SUBGRP_AFI(subgrp);
@ -567,9 +567,11 @@ bool bgp_adj_out_set_subgroup(struct bgp_dest *dest,
* the route wasn't changed actually. * the route wasn't changed actually.
* Do not suppress BGP UPDATES for route-refresh. * Do not suppress BGP UPDATES for route-refresh.
*/ */
if (CHECK_FLAG(bgp->flags, BGP_FLAG_SUPPRESS_DUPLICATES) if (likely(CHECK_FLAG(bgp->flags, BGP_FLAG_SUPPRESS_DUPLICATES)))
&& !CHECK_FLAG(subgrp->sflags, SUBGRP_STATUS_FORCE_UPDATES) attr_hash = attrhash_key_make(attr);
&& adj->attr_hash == attr_hash) {
if (!CHECK_FLAG(subgrp->sflags, SUBGRP_STATUS_FORCE_UPDATES) &&
attr_hash && adj->attr_hash == attr_hash) {
if (BGP_DEBUG(update, UPDATE_OUT)) { if (BGP_DEBUG(update, UPDATE_OUT)) {
char attr_str[BUFSIZ] = {0}; char attr_str[BUFSIZ] = {0};