Author: ae
Date: Fri Jan 10 12:22:49 2014
New Revision: 260510
URL: http://svnweb.freebsd.org/changeset/base/260510
Log:
MFC r260151 (by adrian):
Use an RLOCK here instead of an RWLOCK - matching all the other calls
to lla_lookup().
This drastically reduces the very high lock contention when doing parallel
TCP throughput tests (> 1024 sockets) with IPv6.
MFC r260187:
lla_lookup() does modification only when LLE_CREATE is specified.
Thus we can use IF_AFDATA_RLOCK() instead of IF_AFDATA_LOCK() when doing
lla_lookup() without LLE_CREATE flag.
MFC r260217:
Add IF_AFDATA_WLOCK_ASSERT() in case lla_lookup() is called with
LLE_CREATE flag.
Modified:
stable/9/sys/netinet/if_ether.c
stable/9/sys/netinet/in.c
stable/9/sys/netinet6/in6.c
stable/9/sys/netinet6/nd6.c
stable/9/sys/netinet6/nd6_nbr.c
Directory Properties:
stable/9/sys/ (props changed)
Modified: stable/9/sys/netinet/if_ether.c
==============================================================================
--- stable/9/sys/netinet/if_ether.c Fri Jan 10 12:18:05 2014
(r260509)
+++ stable/9/sys/netinet/if_ether.c Fri Jan 10 12:22:49 2014
(r260510)
@@ -154,10 +154,10 @@ arp_ifscrub(struct ifnet *ifp, uint32_t
addr4.sin_len = sizeof(addr4);
addr4.sin_family = AF_INET;
addr4.sin_addr.s_addr = addr;
- IF_AFDATA_LOCK(ifp);
+ IF_AFDATA_RLOCK(ifp);
lla_lookup(LLTABLE(ifp), (LLE_DELETE | LLE_IFADDR),
(struct sockaddr *)&addr4);
- IF_AFDATA_UNLOCK(ifp);
+ IF_AFDATA_RUNLOCK(ifp);
}
#endif
@@ -790,9 +790,9 @@ reply:
struct llentry *lle = NULL;
sin.sin_addr = itaddr;
- IF_AFDATA_LOCK(ifp);
+ IF_AFDATA_RLOCK(ifp);
lle = lla_lookup(LLTABLE(ifp), 0, (struct sockaddr *)&sin);
- IF_AFDATA_UNLOCK(ifp);
+ IF_AFDATA_RUNLOCK(ifp);
if ((lle != NULL) && (lle->la_flags & LLE_PUB)) {
(void)memcpy(ar_tha(ah), ar_sha(ah), ah->ar_hln);
Modified: stable/9/sys/netinet/in.c
==============================================================================
--- stable/9/sys/netinet/in.c Fri Jan 10 12:18:05 2014 (r260509)
+++ stable/9/sys/netinet/in.c Fri Jan 10 12:22:49 2014 (r260510)
@@ -1499,6 +1499,7 @@ in_lltable_lookup(struct lltable *llt, u
#endif
if (!(flags & LLE_CREATE))
return (NULL);
+ IF_AFDATA_WLOCK_ASSERT(ifp);
/*
* A route that covers the given address must have
* been installed 1st because we are doing a resolution,
Modified: stable/9/sys/netinet6/in6.c
==============================================================================
--- stable/9/sys/netinet6/in6.c Fri Jan 10 12:18:05 2014 (r260509)
+++ stable/9/sys/netinet6/in6.c Fri Jan 10 12:22:49 2014 (r260510)
@@ -2603,6 +2603,7 @@ in6_lltable_lookup(struct lltable *llt,
if (lle == NULL) {
if (!(flags & LLE_CREATE))
return (NULL);
+ IF_AFDATA_WLOCK_ASSERT(ifp);
/*
* A route that covers the given address must have
* been installed 1st because we are doing a resolution,
Modified: stable/9/sys/netinet6/nd6.c
==============================================================================
--- stable/9/sys/netinet6/nd6.c Fri Jan 10 12:18:05 2014 (r260509)
+++ stable/9/sys/netinet6/nd6.c Fri Jan 10 12:22:49 2014 (r260510)
@@ -1154,9 +1154,9 @@ nd6_nud_hint(struct rtentry *rt, struct
return;
ifp = rt->rt_ifp;
- IF_AFDATA_LOCK(ifp);
+ IF_AFDATA_RLOCK(ifp);
ln = nd6_lookup(dst6, ND6_EXCLUSIVE, NULL);
- IF_AFDATA_UNLOCK(ifp);
+ IF_AFDATA_RUNLOCK(ifp);
if (ln == NULL)
return;
@@ -1583,16 +1583,16 @@ nd6_cache_lladdr(struct ifnet *ifp, stru
* description on it in NS section (RFC 2461 7.2.3).
*/
flags = lladdr ? ND6_EXCLUSIVE : 0;
- IF_AFDATA_LOCK(ifp);
+ IF_AFDATA_RLOCK(ifp);
ln = nd6_lookup(from, flags, ifp);
-
+ IF_AFDATA_RUNLOCK(ifp);
if (ln == NULL) {
flags |= ND6_EXCLUSIVE;
+ IF_AFDATA_LOCK(ifp);
ln = nd6_lookup(from, flags | ND6_CREATE, ifp);
IF_AFDATA_UNLOCK(ifp);
is_newentry = 1;
} else {
- IF_AFDATA_UNLOCK(ifp);
/* do nothing if static ndp is set */
if (ln->la_flags & LLE_STATIC) {
static_route = 1;
@@ -1898,9 +1898,9 @@ nd6_output_lle(struct ifnet *ifp, struct
flags = ((m != NULL) || (lle != NULL)) ? LLE_EXCLUSIVE : 0;
if (ln == NULL) {
retry:
- IF_AFDATA_LOCK(ifp);
+ IF_AFDATA_RLOCK(ifp);
ln = lla_lookup(LLTABLE6(ifp), flags, (struct sockaddr *)dst);
- IF_AFDATA_UNLOCK(ifp);
+ IF_AFDATA_RUNLOCK(ifp);
if ((ln == NULL) && nd6_is_addr_neighbor(dst, ifp)) {
/*
* Since nd6_is_addr_neighbor() internally calls
nd6_lookup(),
Modified: stable/9/sys/netinet6/nd6_nbr.c
==============================================================================
--- stable/9/sys/netinet6/nd6_nbr.c Fri Jan 10 12:18:05 2014
(r260509)
+++ stable/9/sys/netinet6/nd6_nbr.c Fri Jan 10 12:22:49 2014
(r260510)
@@ -734,9 +734,9 @@ nd6_na_input(struct mbuf *m, int off, in
* If no neighbor cache entry is found, NA SHOULD silently be
* discarded.
*/
- IF_AFDATA_LOCK(ifp);
+ IF_AFDATA_RLOCK(ifp);
ln = nd6_lookup(&taddr6, LLE_EXCLUSIVE, ifp);
- IF_AFDATA_UNLOCK(ifp);
+ IF_AFDATA_RUNLOCK(ifp);
if (ln == NULL) {
goto freeit;
}
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