Commit f9ffcedd authored by Jesper Dangaard Brouer's avatar Jesper Dangaard Brouer Committed by David S. Miller

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: default avatarJesper Dangaard Brouer <hawk@comx.dk>
Acked-by: default avatarMartin Devera <devik@cdi.cz>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 34a5d713
......@@ -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
......
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