>> I can send 459,000pps through this hardware when it is configured as a
>> router. I only get 252,000pps through the hardware when configured as
>> a bridge.
>>
>> Any ideas why the performance of the bridge is so bad?
>No, but perhaps oprofile would help.
Ah, good point. Sorry. I tried to be a good citizen but forgot the data.
Oprofile is new to me, so be gentle:
# opreport
...
15834 68.2147 bridge
6537 28.1622 e1000
...
# opreport -p /lib/modules/2.6.9-1.667smp/kernel/ --symbols |grep bridge
2908 12.5285 bridge.ko bridge fdb_insert
2731 11.7660 bridge.ko bridge __br_fdb_get
2502 10.7794 bridge.ko bridge br_nf_pre_routing
1400 6.0316 bridge.ko bridge br_nf_post_routing
1113 4.7951 bridge.ko bridge br_handle_frame
731 3.1494 bridge.ko bridge br_handle_frame_finish
677 2.9167 bridge.ko bridge br_nf_forward_ip
651 2.8047 bridge.ko bridge ip_sabotage_out
625 2.6927 bridge.ko bridge br_nf_forward_finish
597 2.5721 bridge.ko bridge br_nf_pre_routing_finish
452 1.9474 bridge.ko bridge br_dev_queue_push_xmit
436 1.8784 bridge.ko bridge br_fdb_insert
276 1.1891 bridge.ko bridge __br_forward
249 1.0728 bridge.ko bridge br_forward_finish
234 1.0081 bridge.ko bridge ip_sabotage_in
201 0.8660 bridge.ko bridge setup_pre_routing
51 0.2197 bridge.ko bridge br_forward
# opreport -p /lib/modules/2.6.9-1.667smp/kernel/ --symbols |grep e1000
2797 12.0503 e1000.ko e1000 e1000_xmit_frame
1317 5.6740 e1000.ko e1000 e1000_clean_rx_irq
835 3.5974 e1000.ko e1000 e1000_clean_tx_irq
575 2.4773 e1000.ko e1000 e1000_alloc_rx_buffers
527 2.2705 e1000.ko e1000 e1000_intr
397 1.7104 e1000.ko e1000 e1000_rx_checksum
78 0.3360 e1000.ko e1000 e1000_clean
7 0.0302 e1000.ko e1000 e1000_update_stats
4 0.0172 e1000.ko e1000 e1000_irq_enable
I'll start looking at the bridge code, something I do frequently, but
thought that I would post these results as a starting point.
