rx: Big windows make us sad

The commit which took our Window size to 128 caused rxperf to run
40 times slower than before. All of the recent rx improvements have
reduced this to being around 2x slower than before, but we're still
not ready for large window sizes.

As 1.6 is nearing release, reset back to the old, fast, window size
of 32. We can revist this as further performance improvements and
restructuring happen on master.

Change-Id: Ic1de2cf33f42edaf1455b72580110d56fe968a7b
Reviewed-on: http://gerrit.openafs.org/2844
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>
Tested-by: Jeffrey Altman <jaltman@openafs.org>

diff --git a/src/rx/rx_globals.h b/src/rx/rx_globals.h
index 7362747..1906686 100644 (file)
--- a/src/rx/rx_globals.h
+++ b/src/rx/rx_globals.h
@@ -128,9 +128,9 @@ EXT int rx_minPeerTimeout GLOBALSINIT(2); /* in milliseconds */
 EXT int rx_minWindow GLOBALSINIT(1);
 EXT int rx_maxWindow GLOBALSINIT(65535);        /* twind is u_short */
 EXT int rx_initReceiveWindow GLOBALSINIT(16);  /* how much to accept */
-EXT int rx_maxReceiveWindow GLOBALSINIT(128);  /* how much to accept */
+EXT int rx_maxReceiveWindow GLOBALSINIT(32);   /* how much to accept */
 EXT int rx_initSendWindow GLOBALSINIT(16);
-EXT int rx_maxSendWindow GLOBALSINIT(128);
+EXT int rx_maxSendWindow GLOBALSINIT(32);
 EXT int rx_nackThreshold GLOBALSINIT(3);       /* Number NACKS to trigger congestion recovery */
 EXT int rx_nDgramThreshold GLOBALSINIT(4);     /* Number of packets before increasing
                                                  * packets per datagram */