916 False-sharing in TCP hash buckets, plus size increase
        (originally Joyent OS-299 tcp_bindi() hash lock contention affects
        TCP client performance)

@@ -19,10 +19,11 @@
  * CDDL HEADER END
  */
 
 /*
  * Copyright (c) 1991, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, Joyent Inc. All rights reserved.
  */
 /* Copyright (c) 1990 Mentat Inc. */
 
 #include <sys/types.h>
 #include <sys/stream.h>

@@ -238,11 +239,11 @@
 #define TIDUSZ  4096    /* transport interface data unit size */
 
 /*
  * Size of acceptor hash list.  It has to be a power of 2 for hashing.
  */
-#define TCP_ACCEPTOR_FANOUT_SIZE                256
+#define TCP_ACCEPTOR_FANOUT_SIZE                512
 
 #ifdef  _ILP32
 #define TCP_ACCEPTOR_HASH(accid)                                        \
                 (((uint_t)(accid) >> 8) & (TCP_ACCEPTOR_FANOUT_SIZE - 1))
 #else