From 2031240890f1a545ed846e4863f5f18ab6a7930f Mon Sep 17 00:00:00 2001 Message-Id: <2031240890f1a545ed846e4863f5f18ab6a7930f.1212498974.git.hawk@comx.dk> From: Jesper Dangaard Brouer Date: Tue, 3 Jun 2008 12:13:32 +0200 Subject: [PATCH 1/2] 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 --- net/sched/sch_htb.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c index 5bc1ed4..9134f02 100644 --- a/net/sched/sch_htb.c +++ b/net/sched/sch_htb.c @@ -53,7 +53,7 @@ */ #define HTB_HSIZE 16 /* classid hash size */ -#define HTB_HYSTERESIS 1 /* whether to use mode hysteresis for speedup */ +#define HTB_HYSTERESIS 0 /* whether to use mode hysteresis for speedup */ #define HTB_VER 0x30011 /* major must be matched with number suplied by TC as version */ #if HTB_VER >> 16 != TC_HTB_PROTOVER -- 1.5.4.2