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| author | Felix Fietkau <nbd@openwrt.org> | 2009-05-13 12:42:55 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2009-05-13 12:42:55 +0000 |
| commit | f9b8d9ebad984eabc42c059c08b77e3cf0ac8307 (patch) | |
| tree | d82da853b8392e9654c7a41c393f36b7960d4d22 /target/linux/generic-2.6/patches-2.6.29 | |
| parent | fce86ebce5d8078c292c1e7e253e20207f9b0f77 (diff) | |
| download | upstream-f9b8d9ebad984eabc42c059c08b77e3cf0ac8307.tar.gz upstream-f9b8d9ebad984eabc42c059c08b77e3cf0ac8307.tar.bz2 upstream-f9b8d9ebad984eabc42c059c08b77e3cf0ac8307.zip | |
reduce the total cpu usage of ipt_do_table under high network load from 3.1% down to 1.6% (tested with oprofile)
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15822 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/generic-2.6/patches-2.6.29')
| -rw-r--r-- | target/linux/generic-2.6/patches-2.6.29/110-netfilter_match_speedup.patch | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/target/linux/generic-2.6/patches-2.6.29/110-netfilter_match_speedup.patch b/target/linux/generic-2.6/patches-2.6.29/110-netfilter_match_speedup.patch index 5bb51bad03..91261d8c10 100644 --- a/target/linux/generic-2.6/patches-2.6.29/110-netfilter_match_speedup.patch +++ b/target/linux/generic-2.6/patches-2.6.29/110-netfilter_match_speedup.patch @@ -75,3 +75,45 @@ } #if defined(CONFIG_NETFILTER_XT_TARGET_TRACE) || \ +@@ -328,8 +354,27 @@ ipt_do_table(struct sk_buff *skb, + struct xt_match_param mtpar; + struct xt_target_param tgpar; + +- /* Initialization */ + ip = ip_hdr(skb); ++ ++ read_lock_bh(&table->lock); ++ IP_NF_ASSERT(table->valid_hooks & (1 << hook)); ++ private = table->private; ++ table_base = (void *)private->entries[smp_processor_id()]; ++ e = get_entry(table_base, private->hook_entry[hook]); ++ if (e->target_offset <= sizeof(struct ipt_entry) && ++ (e->ip.flags & IPT_F_NO_DEF_MATCH)) { ++ struct ipt_entry_target *t = ipt_get_target(e); ++ if (!t->u.kernel.target->target) { ++ int v = ((struct ipt_standard_target *)t)->verdict; ++ if ((v < 0) && (v != IPT_RETURN)) { ++ ADD_COUNTER(e->counters, ntohs(ip->tot_len), 1); ++ read_unlock_bh(&table->lock); ++ return (unsigned)(-v) - 1; ++ } ++ } ++ } ++ ++ /* Initialization */ + datalen = skb->len - ip->ihl * 4; + indev = in ? in->name : nulldevname; + outdev = out ? out->name : nulldevname; +@@ -347,12 +392,6 @@ ipt_do_table(struct sk_buff *skb, + mtpar.family = tgpar.family = NFPROTO_IPV4; + tgpar.hooknum = hook; + +- read_lock_bh(&table->lock); +- IP_NF_ASSERT(table->valid_hooks & (1 << hook)); +- private = table->private; +- table_base = (void *)private->entries[smp_processor_id()]; +- e = get_entry(table_base, private->hook_entry[hook]); +- + /* For return from builtin chain */ + back = get_entry(table_base, private->underflow[hook]); + |