> Please try this patch, it does: Applied the patch, compiled, booted and ran the benchmark.
results: ~4% more packets came through oprofile result of the overloaded bridge clipped to fit follow at the end. I decided to try another comparison: I setup and proxy-arp pseudo-bridge (http://lartc.org/howto/lartc.bridging.proxy-arp.html). The benchmark was only few percentage points faster than the full-blown bridge. Any utility to this as a data-point? It would seem to me that if, what I assume to be, a simpler proxy-arp has the same performance than it is something external to both. --oprofile-- 5212 9.4976 vmlinux kfree 3572 6.5091 vmlinux nf_hook_slow 3234 5.8932 vmlinux eth_type_trans 2820 5.1388 vmlinux nf_iterate 2288 4.1693 vmlinux alloc_skb 2239 4.08 vmlinux _spin_lock 2230 4.0636 vmlinux __kfree_skb 2086 3.8012 e1000 e1000_xmit_frame 1992 3.6299 bridge br_fdb_update 1749 3.1871 vmlinux pfifo_fast_enqueue 1700 3.0978 e1000 e1000_alloc_rx_buffers 1662 3.0286 bridge __br_fdb_get 1552 2.8281 bridge br_handle_frame 1342 2.4455 vmlinux kmem_cache_alloc 1337 2.4364 vmlinux mark_offset_pmtmr 1126 2.0519 bridge br_nf_pre_routing 875 1.5945 vmlinux netif_receive_skb 874 1.5927 vmlinux timer_interrupt 788 1.4359 vmlinux cache_alloc_refill 761 1.3867 bridge ip_sabotage_out 708 1.2902 vmlinux __kmalloc 700 1.2756 vmlinux qdisc_restart 696 1.2683 bridge br_nf_post_routing 662 1.2063 e1000 e1000_clean_tx_irq 636 1.159 e1000 e1000_clean_rx_irq 621 1.1316 vmlinux pfifo_fast_dequeue 615 1.1207 bridge br_nf_forward_ip 576 1.0496 vmlinux cache_flusharray 510 0.9294 bridge br_nf_forward_finish 509 0.9275 bridge br_nf_pre_routing_finish 447 0.8145 vmlinux kmem_cache_free 421 0.7672 vmlinux default_idle 402 0.7325 vmlinux memcpy 393 0.7161 vmlinux _spin_unlock_irqrestore 391 0.7125 e1000 e1000_intr 368 0.6706 bridge br_handle_frame_finish 330 0.6013 vmlinux __do_softirq 295 0.5376 vmlinux dev_queue_xmit 270 0.492 bridge br_dev_queue_push_xmit 267 0.4865 vmlinux net_rx_action 263 0.4793 e1000 e1000_rx_checksum 252 0.4592 bash (no symbols) 240 0.4373 bridge br_forward_finish 239 0.4355 bridge setup_pre_routing 229 0.4173 oprofiled (no symbols) 226 0.4118 vmlinux irq_entries_start 207 0.3772 bridge __br_forward 196 0.3572 bridge ip_sabotage_in 182 0.3317 vmlinux profile_hook 171 0.3116 vmlinux _spin_unlock 159 0.2897 vmlinux dev_queue_xmit_nit 129 0.2351 vmlinux do_wp_page 112 0.2041 libc-2.3.4.so __gconv_transform_utf8_internal 99 0.1804 vmlinux skb_release_data 98 0.1786 vmlinux apic_timer_interrupt 95 0.1731 vmlinux delay_pmtmr 80 0.1458 libc-2.3.4.so mbrtowc 75 0.1367 vmlinux local_bh_enable 72 0.1312 vmlinux kmap_atomic 65 0.1184 vmlinux handle_IRQ_event 64 0.1166 e1000 e1000_clean 63 0.1148 vmlinux kfree_skbmem 56 0.102 libc-2.3.4.so _int_malloc 56 0.102 vmlinux copy_page_range 55 0.1002 vmlinux do_IRQ 55 0.1002 vmlinux zap_pte_range 51 0.0929 ld-2.3.4.so do_lookup_x 51 0.0929 vmlinux do_no_page 49 0.0893 bridge br_forward
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