From b552f7e3a9524abcbcdf86f0a99b2be58e55a9c6 Mon Sep 17 00:00:00 2001 From: Changli Gao Date: Sat, 19 Feb 2011 17:32:28 +0800 Subject: [PATCH] ipvs: unify the formula to estimate the overhead of processing connections lc and wlc use the same formula, but lblc and lblcr use another one. There is no reason for using two different formulas for the lc variants. The formula used by lc is used by all the lc variants in this patch. Signed-off-by: Changli Gao Acked-by: Wensong Zhang Signed-off-by: Simon Horman --- include/net/ip_vs.h | 14 ++++++++++++++ net/netfilter/ipvs/ip_vs_lblc.c | 13 +++---------- net/netfilter/ipvs/ip_vs_lblcr.c | 25 +++++++------------------ net/netfilter/ipvs/ip_vs_lc.c | 18 +----------------- net/netfilter/ipvs/ip_vs_wlc.c | 20 ++------------------ 5 files changed, 27 insertions(+), 63 deletions(-) diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h index 17b01b2d48f..e74da41ebd1 100644 --- a/include/net/ip_vs.h +++ b/include/net/ip_vs.h @@ -1243,6 +1243,20 @@ static inline void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp) /* CONFIG_IP_VS_NFCT */ #endif +static inline unsigned int +ip_vs_dest_conn_overhead(struct ip_vs_dest *dest) +{ + /* + * We think the overhead of processing active connections is 256 + * times higher than that of inactive connections in average. (This + * 256 times might not be accurate, we will change it later) We + * use the following formula to estimate the overhead now: + * dest->activeconns*256 + dest->inactconns + */ + return (atomic_read(&dest->activeconns) << 8) + + atomic_read(&dest->inactconns); +} + #endif /* __KERNEL__ */ #endif /* _NET_IP_VS_H */ diff --git a/net/netfilter/ipvs/ip_vs_lblc.c b/net/netfilter/ipvs/ip_vs_lblc.c index 4a9c8cd1969..6bf7a807649 100644 --- a/net/netfilter/ipvs/ip_vs_lblc.c +++ b/net/netfilter/ipvs/ip_vs_lblc.c @@ -389,12 +389,7 @@ __ip_vs_lblc_schedule(struct ip_vs_service *svc) int loh, doh; /* - * We think the overhead of processing active connections is fifty - * times higher than that of inactive connections in average. (This - * fifty times might not be accurate, we will change it later.) We - * use the following formula to estimate the overhead: - * dest->activeconns*50 + dest->inactconns - * and the load: + * We use the following formula to estimate the load: * (dest overhead) / dest->weight * * Remember -- no floats in kernel mode!!! @@ -410,8 +405,7 @@ __ip_vs_lblc_schedule(struct ip_vs_service *svc) continue; if (atomic_read(&dest->weight) > 0) { least = dest; - loh = atomic_read(&least->activeconns) * 50 - + atomic_read(&least->inactconns); + loh = ip_vs_dest_conn_overhead(least); goto nextstage; } } @@ -425,8 +419,7 @@ __ip_vs_lblc_schedule(struct ip_vs_service *svc) if (dest->flags & IP_VS_DEST_F_OVERLOAD) continue; - doh = atomic_read(&dest->activeconns) * 50 - + atomic_read(&dest->inactconns); + doh = ip_vs_dest_conn_overhead(dest); if (loh * atomic_read(&dest->weight) > doh * atomic_read(&least->weight)) { least = dest; diff --git a/net/netfilter/ipvs/ip_vs_lblcr.c b/net/netfilter/ipvs/ip_vs_lblcr.c index bd329b1e958..00631765b92 100644 --- a/net/netfilter/ipvs/ip_vs_lblcr.c +++ b/net/netfilter/ipvs/ip_vs_lblcr.c @@ -178,8 +178,7 @@ static inline struct ip_vs_dest *ip_vs_dest_set_min(struct ip_vs_dest_set *set) if ((atomic_read(&least->weight) > 0) && (least->flags & IP_VS_DEST_F_AVAILABLE)) { - loh = atomic_read(&least->activeconns) * 50 - + atomic_read(&least->inactconns); + loh = ip_vs_dest_conn_overhead(least); goto nextstage; } } @@ -192,8 +191,7 @@ static inline struct ip_vs_dest *ip_vs_dest_set_min(struct ip_vs_dest_set *set) if (dest->flags & IP_VS_DEST_F_OVERLOAD) continue; - doh = atomic_read(&dest->activeconns) * 50 - + atomic_read(&dest->inactconns); + doh = ip_vs_dest_conn_overhead(dest); if ((loh * atomic_read(&dest->weight) > doh * atomic_read(&least->weight)) && (dest->flags & IP_VS_DEST_F_AVAILABLE)) { @@ -228,8 +226,7 @@ static inline struct ip_vs_dest *ip_vs_dest_set_max(struct ip_vs_dest_set *set) list_for_each_entry(e, &set->list, list) { most = e->dest; if (atomic_read(&most->weight) > 0) { - moh = atomic_read(&most->activeconns) * 50 - + atomic_read(&most->inactconns); + moh = ip_vs_dest_conn_overhead(most); goto nextstage; } } @@ -239,8 +236,7 @@ static inline struct ip_vs_dest *ip_vs_dest_set_max(struct ip_vs_dest_set *set) nextstage: list_for_each_entry(e, &set->list, list) { dest = e->dest; - doh = atomic_read(&dest->activeconns) * 50 - + atomic_read(&dest->inactconns); + doh = ip_vs_dest_conn_overhead(dest); /* moh/mw < doh/dw ==> moh*dw < doh*mw, where mw,dw>0 */ if ((moh * atomic_read(&dest->weight) < doh * atomic_read(&most->weight)) @@ -563,12 +559,7 @@ __ip_vs_lblcr_schedule(struct ip_vs_service *svc) int loh, doh; /* - * We think the overhead of processing active connections is fifty - * times higher than that of inactive connections in average. (This - * fifty times might not be accurate, we will change it later.) We - * use the following formula to estimate the overhead: - * dest->activeconns*50 + dest->inactconns - * and the load: + * We use the following formula to estimate the load: * (dest overhead) / dest->weight * * Remember -- no floats in kernel mode!!! @@ -585,8 +576,7 @@ __ip_vs_lblcr_schedule(struct ip_vs_service *svc) if (atomic_read(&dest->weight) > 0) { least = dest; - loh = atomic_read(&least->activeconns) * 50 - + atomic_read(&least->inactconns); + loh = ip_vs_dest_conn_overhead(least); goto nextstage; } } @@ -600,8 +590,7 @@ __ip_vs_lblcr_schedule(struct ip_vs_service *svc) if (dest->flags & IP_VS_DEST_F_OVERLOAD) continue; - doh = atomic_read(&dest->activeconns) * 50 - + atomic_read(&dest->inactconns); + doh = ip_vs_dest_conn_overhead(dest); if (loh * atomic_read(&dest->weight) > doh * atomic_read(&least->weight)) { least = dest; diff --git a/net/netfilter/ipvs/ip_vs_lc.c b/net/netfilter/ipvs/ip_vs_lc.c index 60638007c6c..f391819c0cc 100644 --- a/net/netfilter/ipvs/ip_vs_lc.c +++ b/net/netfilter/ipvs/ip_vs_lc.c @@ -22,22 +22,6 @@ #include - -static inline unsigned int -ip_vs_lc_dest_overhead(struct ip_vs_dest *dest) -{ - /* - * We think the overhead of processing active connections is 256 - * times higher than that of inactive connections in average. (This - * 256 times might not be accurate, we will change it later) We - * use the following formula to estimate the overhead now: - * dest->activeconns*256 + dest->inactconns - */ - return (atomic_read(&dest->activeconns) << 8) + - atomic_read(&dest->inactconns); -} - - /* * Least Connection scheduling */ @@ -62,7 +46,7 @@ ip_vs_lc_schedule(struct ip_vs_service *svc, const struct sk_buff *skb) if ((dest->flags & IP_VS_DEST_F_OVERLOAD) || atomic_read(&dest->weight) == 0) continue; - doh = ip_vs_lc_dest_overhead(dest); + doh = ip_vs_dest_conn_overhead(dest); if (!least || doh < loh) { least = dest; loh = doh; diff --git a/net/netfilter/ipvs/ip_vs_wlc.c b/net/netfilter/ipvs/ip_vs_wlc.c index fdf0f58962a..bc1bfc48a17 100644 --- a/net/netfilter/ipvs/ip_vs_wlc.c +++ b/net/netfilter/ipvs/ip_vs_wlc.c @@ -27,22 +27,6 @@ #include - -static inline unsigned int -ip_vs_wlc_dest_overhead(struct ip_vs_dest *dest) -{ - /* - * We think the overhead of processing active connections is 256 - * times higher than that of inactive connections in average. (This - * 256 times might not be accurate, we will change it later) We - * use the following formula to estimate the overhead now: - * dest->activeconns*256 + dest->inactconns - */ - return (atomic_read(&dest->activeconns) << 8) + - atomic_read(&dest->inactconns); -} - - /* * Weighted Least Connection scheduling */ @@ -71,7 +55,7 @@ ip_vs_wlc_schedule(struct ip_vs_service *svc, const struct sk_buff *skb) if (!(dest->flags & IP_VS_DEST_F_OVERLOAD) && atomic_read(&dest->weight) > 0) { least = dest; - loh = ip_vs_wlc_dest_overhead(least); + loh = ip_vs_dest_conn_overhead(least); goto nextstage; } } @@ -85,7 +69,7 @@ ip_vs_wlc_schedule(struct ip_vs_service *svc, const struct sk_buff *skb) list_for_each_entry_continue(dest, &svc->destinations, n_list) { if (dest->flags & IP_VS_DEST_F_OVERLOAD) continue; - doh = ip_vs_wlc_dest_overhead(dest); + doh = ip_vs_dest_conn_overhead(dest); if (loh * atomic_read(&dest->weight) > doh * atomic_read(&least->weight)) { least = dest; -- 2.41.0