[PATCH 05/20] ipvs: optimize rates reading

Simon Horman
2011-03-14T03:45:31Z

From: Julian Anastasov <ja@ssi.bg>

Move the estimator reading from estimation_timer to user
context. ip_vs_read_estimator() will be used to decode the rate
values. As the decoded rates are not set by estimation timer
there is no need to reset them in ip_vs_zero_stats.

There is no need ip_vs_new_estimator() to encode stats
to rates, if the destination is in trash both the stats and the
rates are inactive.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
---
include/net/ip_vs.h | 2 ++
net/netfilter/ipvs/ip_vs_ctl.c | 31 ++++++++++++-------------------
net/netfilter/ipvs/ip_vs_est.c | 33 +++++++++++++--------------------
3 files changed, 27 insertions(+), 39 deletions(-)

diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
index cf014ab..e4a39c4 100644
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -1179,6 +1179,8 @@ extern void ip_vs_estimator_cleanup(void);
extern void ip_vs_new_estimator(struct net *net, struct ip_vs_stats *stats);
extern void ip_vs_kill_estimator(struct net *net, struct ip_vs_stats *stats);
extern void ip_vs_zero_estimator(struct ip_vs_stats *stats);
+extern void ip_vs_read_estimator(struct ip_vs_stats_user *dst,
+ struct ip_vs_stats *stats);

/*
* Various IPVS packet transmitters (from ip_vs_xmit.c)
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index 804fee7..c93d806 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -715,7 +715,6 @@ static void
ip_vs_copy_stats(struct ip_vs_stats_user *dst, struct ip_vs_stats *src)
{
#define IP_VS_SHOW_STATS_COUNTER(c) dst->c = src->ustats.c - src->ustats0.c
-#define IP_VS_SHOW_STATS_RATE(r) dst->r = src->ustats.r

spin_lock_bh(&src->lock);

@@ -725,11 +724,7 @@ ip_vs_copy_stats(struct ip_vs_stats_user *dst, struct ip_vs_stats *src)
IP_VS_SHOW_STATS_COUNTER(inbytes);
IP_VS_SHOW_STATS_COUNTER(outbytes);

- IP_VS_SHOW_STATS_RATE(cps);
- IP_VS_SHOW_STATS_RATE(inpps);
- IP_VS_SHOW_STATS_RATE(outpps);
- IP_VS_SHOW_STATS_RATE(inbps);
- IP_VS_SHOW_STATS_RATE(outbps);
+ ip_vs_read_estimator(dst, src);

spin_unlock_bh(&src->lock);
}
@@ -742,7 +737,6 @@ ip_vs_zero_stats(struct ip_vs_stats *stats)
/* get current counters as zero point, rates are zeroed */

#define IP_VS_ZERO_STATS_COUNTER(c) stats->ustats0.c = stats->ustats.c
-#define IP_VS_ZERO_STATS_RATE(r) stats->ustats.r = 0

IP_VS_ZERO_STATS_COUNTER(conns);
IP_VS_ZERO_STATS_COUNTER(inpkts);
@@ -750,12 +744,6 @@ ip_vs_zero_stats(struct ip_vs_stats *stats)
IP_VS_ZERO_STATS_COUNTER(inbytes);
IP_VS_ZERO_STATS_COUNTER(outbytes);

- IP_VS_ZERO_STATS_RATE(cps);
- IP_VS_ZERO_STATS_RATE(inpps);
- IP_VS_ZERO_STATS_RATE(outpps);
- IP_VS_ZERO_STATS_RATE(inbps);
- IP_VS_ZERO_STATS_RATE(outbps);
-
ip_vs_zero_estimator(stats);

spin_unlock_bh(&stats->lock);
@@ -2043,6 +2031,7 @@ static int ip_vs_stats_percpu_show(struct seq_file *seq, void *v)
struct net *net = seq_file_single_net(seq);
struct ip_vs_stats *tot_stats = &net_ipvs(net)->tot_stats;
struct ip_vs_cpu_stats *cpustats = tot_stats->cpustats;
+ struct ip_vs_stats_user rates;
int i;

/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
@@ -2069,22 +2058,26 @@ static int ip_vs_stats_percpu_show(struct seq_file *seq, void *v)
}

spin_lock_bh(&tot_stats->lock);
+
seq_printf(seq, " ~ %8X %8X %8X %16LX %16LX\n\n",
tot_stats->ustats.conns, tot_stats->ustats.inpkts,
tot_stats->ustats.outpkts,
(unsigned long long) tot_stats->ustats.inbytes,
(unsigned long long) tot_stats->ustats.outbytes);

+ ip_vs_read_estimator(&rates, tot_stats);
+
+ spin_unlock_bh(&tot_stats->lock);
+
/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
seq_puts(seq,
" Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
seq_printf(seq, " %8X %8X %8X %16X %16X\n",
- tot_stats->ustats.cps,
- tot_stats->ustats.inpps,
- tot_stats->ustats.outpps,
- tot_stats->ustats.inbps,
- tot_stats->ustats.outbps);
- spin_unlock_bh(&tot_stats->lock);
+ rates.cps,
+ rates.inpps,
+ rates.outpps,
+ rates.inbps,
+ rates.outbps);

return 0;
}
diff --git a/net/netfilter/ipvs/ip_vs_est.c b/net/netfilter/ipvs/ip_vs_est.c
index a850087..fda75be 100644
--- a/net/netfilter/ipvs/ip_vs_est.c
+++ b/net/netfilter/ipvs/ip_vs_est.c
@@ -117,27 +117,22 @@ static void estimation_timer(unsigned long arg)
rate = (n_conns - e->last_conns) << 9;
e->last_conns = n_conns;
e->cps += ((long)rate - (long)e->cps) >> 2;
- s->ustats.cps = (e->cps + 0x1FF) >> 10;

rate = (n_inpkts - e->last_inpkts) << 9;
e->last_inpkts = n_inpkts;
e->inpps += ((long)rate - (long)e->inpps) >> 2;
- s->ustats.inpps = (e->inpps + 0x1FF) >> 10;

rate = (n_outpkts - e->last_outpkts) << 9;
e->last_outpkts = n_outpkts;
e->outpps += ((long)rate - (long)e->outpps) >> 2;
- s->ustats.outpps = (e->outpps + 0x1FF) >> 10;

rate = (n_inbytes - e->last_inbytes) << 4;
e->last_inbytes = n_inbytes;
e->inbps += ((long)rate - (long)e->inbps) >> 2;
- s->ustats.inbps = (e->inbps + 0xF) >> 5;

rate = (n_outbytes - e->last_outbytes) << 4;
e->last_outbytes = n_outbytes;
e->outbps += ((long)rate - (long)e->outbps) >> 2;
- s->ustats.outbps = (e->outbps + 0xF) >> 5;
spin_unlock(&s->lock);
}
spin_unlock(&ipvs->est_lock);
@@ -151,21 +146,6 @@ void ip_vs_new_estimator(struct net *net, struct ip_vs_stats *stats)

INIT_LIST_HEAD(&est->list);

- est->last_conns = stats->ustats.conns;
- est->cps = stats->ustats.cps<<10;
-
- est->last_inpkts = stats->ustats.inpkts;
- est->inpps = stats->ustats.inpps<<10;
-
- est->last_outpkts = stats->ustats.outpkts;
- est->outpps = stats->ustats.outpps<<10;
-
- est->last_inbytes = stats->ustats.inbytes;
- est->inbps = stats->ustats.inbps<<5;
-
- est->last_outbytes = stats->ustats.outbytes;
- est->outbps = stats->ustats.outbps<<5;
-
spin_lock_bh(&ipvs->est_lock);
list_add(&est->list, &ipvs->est_list);
spin_unlock_bh(&ipvs->est_lock);
@@ -199,6 +179,19 @@ void ip_vs_zero_estimator(struct ip_vs_stats *stats)
est->outbps = 0;
}

+/* Get decoded rates */
+void ip_vs_read_estimator(struct ip_vs_stats_user *dst,
+ struct ip_vs_stats *stats)
+{
+ struct ip_vs_estimator *e = &stats->est;
+
+ dst->cps = (e->cps + 0x1FF) >> 10;
+ dst->inpps = (e->inpps + 0x1FF) >> 10;
+ dst->outpps = (e->outpps + 0x1FF) >> 10;
+ dst->inbps = (e->inbps + 0xF) >> 5;
+ dst->outbps = (e->outbps + 0xF) >> 5;
+}
+
static int __net_init __ip_vs_estimator_init(struct net *net)
{
struct netns_ipvs *ipvs = net_ipvs(net);
--
1.7.2.3