]> err.no Git - linux-2.6/commit
pkt_sched: HTB scheduler, change default hysteresis mode to off.
authorJesper Dangaard Brouer <hawk@comx.dk>
Mon, 16 Jun 2008 23:38:33 +0000 (16:38 -0700)
committerDavid S. Miller <davem@davemloft.net>
Mon, 16 Jun 2008 23:38:33 +0000 (16:38 -0700)
commitf9ffcedddba5b2fc5ab16ef08bca55af8be2717e
treedc51b00085b8db2863c4191ea8b1d5623057c11a
parent34a5d713056c325e5bf2b5361646585d5f550a72
pkt_sched: HTB scheduler, change default hysteresis mode to off.

The HTB hysteresis mode reduce the CPU load, but at the
cost of scheduling accuracy.

On ADSL links (512 kbit/s upstream), this inaccuracy introduce
significant jitter, enought to disturbe VoIP.  For details see my
masters thesis (http://www.adsl-optimizer.dk/thesis/), chapter 7,
section 7.3.1, pp 69-70.

Signed-off-by: Jesper Dangaard Brouer <hawk@comx.dk>
Acked-by: Martin Devera <devik@cdi.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/sched/sch_htb.c