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Message-Id: <1189592042.26927.23.camel@localhost.localdomain> Date: Wed, 12 Sep 2007 12:14:02 +0200 From: Jesper Dangaard Brouer <jdb@...x.dk> To: "netdev@...r.kernel.org" <netdev@...r.kernel.org> Cc: Patrick McHardy <kaber@...sh.net>, "David S. Miller" <davem@...emloft.net>, Stephen Hemminger <shemminger@...ux-foundation.org> Subject: [PATCH 2/6] [NET_SCHED]: Making rate table lookups more flexible commit 57e993268df114a4270519b1004b8ea8086f671f Author: Jesper Dangaard Brouer <hawk@...x.dk> Date: Tue Sep 11 15:44:15 2007 +0200 [NET_SCHED]: Making rate table lookups more flexible. This is done in order to, add support to changing the rate table to use the upper-boundry L2T (length to time) value. Currently we use the lower-boundry, which result in under-estimating the actual bandwidth usage. Extend the tc_ratespec struct, with two parameters: 1) "cell_align" that allow adjusting the alignment of the rate table. 2) "overhead" that allow adding a packet overhead before the lookup. Signed-off-by: Jesper Dangaard Brouer <hawk@...x.dk> diff --git a/include/linux/pkt_sched.h b/include/linux/pkt_sched.h index 268c515..919af93 100644 --- a/include/linux/pkt_sched.h +++ b/include/linux/pkt_sched.h @@ -77,8 +77,8 @@ struct tc_ratespec { unsigned char cell_log; unsigned char __reserved; - unsigned short feature; - short addend; + unsigned short overhead; + short cell_align; unsigned short mpu; __u32 rate; }; diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h index 4ebd615..a02ec9e 100644 --- a/include/net/sch_generic.h +++ b/include/net/sch_generic.h @@ -307,7 +307,9 @@ drop: */ static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen) { - int slot = pktlen; + int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead; + if (slot < 0) + slot = 0; slot >>= rtab->rate.cell_log; if (slot > 255) return (rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]); - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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