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authorGreg Banks <gnb@melbourne.sgi.com>2006-10-02 02:17:54 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-02 07:57:19 -0700
commit36bdfc8bae51339aa27ef8e4ce148185293061ae (patch)
treedeab54ff70d6991c1e5be0d9efe97d10f65375b0 /net/sunrpc/svc.c
parent4a3ae42dc312dbdffee803efaf393421b79f997a (diff)
downloadlinux-36bdfc8bae51339aa27ef8e4ce148185293061ae.tar.bz2
[PATCH] knfsd: move tempsock aging to a timer
Following are 11 patches from Greg Banks which combine to make knfsd more Numa-aware. They reduce hitting on 'global' data structures, and create some data-structures that can be node-local. knfsd threads are bound to a particular node, and the thread to handle a new request is chosen from the threads that are attach to the node that received the interrupt. The distribution of threads across nodes can be controlled by a new file in the 'nfsd' filesystem, though the default approach of an even spread is probably fine for most sites. Some (old) numbers that show the efficacy of these patches: N == number of NICs == number of CPUs == nmber of clients. Number of NUMA nodes == N/2 N Throughput, MiB/s CPU usage, % (max=N*100) Before After Before After --- ------ ---- ----- ----- 4 312 435 350 228 6 500 656 501 418 8 562 804 690 589 This patch: Move the aging of RPC/TCP connection sockets from the main svc_recv() loop to a timer which uses a mark-and-sweep algorithm every 6 minutes. This reduces the amount of work that needs to be done in the main RPC loop and the length of time we need to hold the (effectively global) svc_serv->sv_lock. [akpm@osdl.org: cleanup] Signed-off-by: Greg Banks <gnb@melbourne.sgi.com> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'net/sunrpc/svc.c')
-rw-r--r--net/sunrpc/svc.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index eee45a58f3ee..0c2c52276285 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -59,6 +59,7 @@ svc_create(struct svc_program *prog, unsigned int bufsize,
INIT_LIST_HEAD(&serv->sv_sockets);
INIT_LIST_HEAD(&serv->sv_tempsocks);
INIT_LIST_HEAD(&serv->sv_permsocks);
+ init_timer(&serv->sv_temptimer);
spin_lock_init(&serv->sv_lock);
/* Remove any stale portmap registrations */
@@ -87,6 +88,8 @@ svc_destroy(struct svc_serv *serv)
} else
printk("svc_destroy: no threads for serv=%p!\n", serv);
+ del_timer_sync(&serv->sv_temptimer);
+
while (!list_empty(&serv->sv_tempsocks)) {
svsk = list_entry(serv->sv_tempsocks.next,
struct svc_sock,