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-rw-r--r--doc/sync/ftfw/conntrackd.conf13
-rw-r--r--src/read_config_yy.y4
2 files changed, 13 insertions, 4 deletions
diff --git a/doc/sync/ftfw/conntrackd.conf b/doc/sync/ftfw/conntrackd.conf
index 3aa8216..06c3d15 100644
--- a/doc/sync/ftfw/conntrackd.conf
+++ b/doc/sync/ftfw/conntrackd.conf
@@ -27,8 +27,17 @@ Sync {
#
PurgeTimeout 15
- # Set Acknowledgement window size
- ACKWindowSize 20
+ # Set the acknowledgement window size. If you decrease this
+ # value, the number of acknowlegdments increases. More
+ # acknowledgments means more overhead as conntrackd has to
+ # handle more control messages. On the other hand, if you
+ # increase this value, the resend queue gets more populated.
+ # This results in more overhead in the queue releasing.
+ # The following value is based on some practical experiments
+ # measuring the cycles spent by the acknowledgment handling
+ # with oprofile.
+ #
+ ACKWindowSize 300
}
#
diff --git a/src/read_config_yy.y b/src/read_config_yy.y
index c01abe4..0f6ffdc 100644
--- a/src/read_config_yy.y
+++ b/src/read_config_yy.y
@@ -1006,9 +1006,9 @@ init_config(char *filename)
if (CONFIG(resend_queue_size) == 0)
CONFIG(resend_queue_size) = 262144;
- /* default to a window size of 20 packets */
+ /* default to a window size of 300 packets */
if (CONFIG(window_size) == 0)
- CONFIG(window_size) = 20;
+ CONFIG(window_size) = 300;
/* double of 120 seconds which is common timeout of a final state */
if (conf.flags & CTD_SYNC_FTFW && CONFIG(del_timeout) == 0)