Michael Bellion and Thomas Heinz wrote:
> Hi Pekka
>>Thanks for your clarification. We've also conducted some tests with
>>bridging firewall functionality, and we're very pleased with nf-hipac's
>>performance! Results below.
> Great, thanks a lot. Your tests are very interesting for us as we haven't done
> any gigabit or SMP tests yet.
>>In the measurements, tests were run through a bridging Linux firewall,
>>with a netperf UDP stream of 1450 byte packets (launched from a different
>>computer connected with gigabit ethernet), with a varying amount of
>>filtering rules checks for each packet.
>>I don't have the specs of the Linux PC hardware handy, but I recall
>>they're *very* highend dual-P4's, like 2.4Ghz, very fast PCI bus, etc.
> Since real world network traffic always consists of a lot of different sized
> packets taking maximum sized packets is very euphemistic. 1450 byte packets
> at 950 Mbit/s correspond to approx. 80,000 packets/sec.
> We are really interested in how our algorithm performs at higher packet rates.
> Our performance tests are based on 100 Mbit hardware so we coudn't test with
> more than approx. 80,000 packets/sec even with minimum sized packets.
Interrupt latency is the problem here. You'll require napi et. al
to get over this hump.
> At this
> packet rate we were hardly able to drive the algorithm to its limit, even
> with more than 25000 rules involved (and our test system was 1.3 GHz
Cool. The same sort of test with ordinary netfilter that
I did showed it could only handle around 125 rules at this
packet rate on a 1.4GHz PIII, e1000 @ 100Mb/s.
# ./readprofile -m /boot/System.map | sort -nr | head -30
6779 total 0.0047
4441 default_idle 69.3906
787 handle_IRQ_event 7.0268
589 ip_packet_match 1.6733
433 ipt_do_table 0.6294
106 eth_type_trans 0.5521
56 kfree 0.8750
46 skb_release_data 0.3194
37 add_timer_randomness 0.1542
35 alloc_skb 0.0781
30 __kmem_cache_alloc 0.1172
27 kmalloc 0.3375
23 ip_rcv 0.0342
22 do_gettimeofday 0.1964
20 netif_rx 0.0521
19 __kfree_skb 0.0540
18 add_entropy_words 0.1023
15 __constant_c_and_count_memset 0.0938
13 batch_entropy_store 0.0813
12 kfree_skbmem 0.1071
11 netif_receive_skb 0.0208
7 nf_iterate 0.0437
7 nf_hook_slow 0.0175
6 process_backlog 0.0221
5 batch_entropy_process 0.0223
5 add_interrupt_randomness 0.0781
3 kmem_cache_free 0.0625
2 ipt_hook 0.0312
1 write_profile 0.0156
1 ip_promisc_rcv_finish 0.0208
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This archive was generated by hypermail 2b29 : Mon Jul 07 2003 - 22:00:16 EST