Even with per bucket locking scheme, in a massive parallel
system with active rds sockets which could be in excess of multiple
of 10K, rds_bin_lookup() workload is siginificant because of smaller
hashtable size.
With some tests, it was found that we get modest but still nice
reduction in rds_bind_lookup with bigger bucket.
Hashtable Baseline(1k) Delta
2048: 8.28% -2.45%
4096: 8.28% -4.60%
8192: 8.28% -6.46%
16384: 8.28% -6.75%
Based on the data, we set 8K as the bind hash-table size.
Signed-off-by: Santosh Shilimkar <ssant...@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilim...@oracle.com>
---
net/rds/bind.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/rds/bind.c b/net/rds/bind.c
index bc6b93e..fb2d545 100644
--- a/net/rds/bind.c
+++ b/net/rds/bind.c
@@ -43,7 +43,7 @@ struct bind_bucket {
struct hlist_head head;
};
-#define BIND_HASH_SIZE 1024
+#define BIND_HASH_SIZE 8192
static struct bind_bucket bind_hash_table[BIND_HASH_SIZE];
static struct bind_bucket *hash_to_bucket(__be32 addr, __be16 port)
--
1.9.1
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