diff options
| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2008-10-21 22:48:31 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2008-10-21 22:48:31 +0200 |
| commit | 61a1120a6bf28e9206e012f6c327b67d50edc1c8 (patch) | |
| tree | c29ced71139c5cc11dac8cb6e55482504d156508 | |
| parent | 51bba395e55c839ee680ccc2ed69f3ba11597424 (diff) | |
ftfw: rise the size of the acknowledgment window in the example
This patch increases the size of the acknowledgment window based on
some experiments in my testbed with oprofile. The previous default value
was too small. This resulted in too many cycles to empty the resend
queue.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| -rw-r--r-- | doc/sync/ftfw/conntrackd.conf | 13 | ||||
| -rw-r--r-- | src/read_config_yy.y | 4 |
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) |