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Date: Fri, 11 Jan 2008 11:26:45 +0300 From: Badalian Vyacheslav <slavon@...telecom.ru> To: netdev@...r.kernel.org Subject: HTB classify perfomance Hello all. I N days try to tune system for best performance and see strange thing. Have N htb classes root class is HTB. param: default 7 (if not classify - go to 1:7) filters classify only mached ip. others go to HTB DEFAULT rule. run oprofile: First pc (htb and iptables compile in kernel): CPU: P4 / Xeon, speed 3409.94 MHz (estimated) Counted GLOBAL_POWER_EVENTS events (time during which processor is not stopped) with a unit mask of 0x01 (mandatory) count 100000 samples % app name symbol name 743501 47.6081 vmlinux htb_classify 208718 13.3647 vmlinux ipt_do_table 94473 6.0493 vmlinux u32_classify 43088 2.7590 vmlinux e1000_intr 35086 2.2466 vmlinux e1000_clean_tx_irq 34925 2.2363 vmlinux ip_route_input 33972 2.1753 vmlinux e1000_irq_enable 33788 2.1635 vmlinux htb_dequeue 29197 1.8696 vmlinux e1000_clean_rx_irq 20177 1.2920 vmlinux sfq_dequeue 17825 1.1414 vmlinux sfq_enqueue 15135 0.9691 vmlinux e1000_xmit_frame 15123 0.9684 vmlinux eth_type_trans 13081 0.8376 vmlinux kfree 12153 0.7782 vmlinux dev_queue_xmit Second PC (htb and iptables is modules) CPU: P4 / Xeon with 2 hyper-threads, speed 3192.35 MHz (estimated) Counted GLOBAL_POWER_EVENTS events (time during which processor is not stopped) with a unit mask of 0x01 (mandatory) count 100000 samples % app name symbol name 102108 30.7351 sch_htb (no symbols) 21559 6.4894 vmlinux e1000_intr 17428 5.2459 cls_u32 (no symbols) 13887 4.1801 ip_tables (no symbols) 11984 3.6072 sch_sfq (no symbols) 11785 3.5473 vmlinux e1000_irq_enable 9684 2.9149 vmlinux mwait_idle_with_hints 9227 2.7774 vmlinux e1000_clean_rx_irq 8686 2.6145 vmlinux e1000_clean_tx_irq 6747 2.0309 vmlinux ip_route_input 6533 1.9665 vmlinux irq_entries_start 6419 1.9322 vmlinux e1000_xmit_frame 5605 1.6871 vmlinux dev_queue_xmit 4030 1.2131 vmlinux __kfree_skb 3997 1.2031 vmlinux __qdisc_run 3931 1.1833 vmlinux e1000_clean 3565 1.0731 vmlinux net_rx_action 3518 1.0589 vmlinux ip_rcv 3377 1.0165 vmlinux getnstimeofday 3215 0.9677 vmlinux rb_erase 2973 0.8949 vmlinux eth_type_trans 2707 0.8148 vmlinux ip_output 2586 0.7784 vmlinux handle_fasteoi_irq Hmm.. strange... look to code htb_classify i see only one place where it may get many CPU. ok... try to add to the end of tc batch file.. filter add dev eth1 protocol ip parent 1:0 prio 5 u32 ht 800:: match ip protocol 1 0x00 flowid 1:7 filter add dev eth0 protocol ip parent 1:0 prio 5 u32 ht 800:: match ip protocol 1 0x00 flowid 1:7 (offtopic... strange... i not found that i can add filter without any match) Wow! CPU: P4 / Xeon, speed 3409.94 MHz (estimated) Counted GLOBAL_POWER_EVENTS events (time during which processor is not stopped) with a unit mask of 0x01 (mandatory) count 100000 samples % app name symbol name 153128 20.9497 vmlinux ipt_unregister_table 121569 16.6321 vmlinux e1000_request_irq 60727 8.3082 vmlinux e1000_update_itr 47241 6.4631 vmlinux u32_delete 25836 3.5347 vmlinux htb_dequeue 18304 2.5042 vmlinux ipt_do_table 15980 2.1862 vmlinux mwait_idle_with_hints 15977 2.1858 vmlinux irq_entries_start 13337 1.8247 vmlinux htb_classify 12512 1.7118 vmlinux __ip_route_output_key 8821 1.2068 vmlinux sfq_init 8495 1.1622 vmlinux e1000_clean_rx_irq 8408 1.1503 vmlinux htb_enqueue 8018 1.0970 vmlinux e1000_xmit_frame 7867 1.0763 vmlinux e1000_clean_tx_ring 6336 0.8668 vmlinux htb_delete 5828 0.7973 vmlinux ___pskb_trim 5781 0.7909 vmlinux s_start 5234 0.7161 vmlinux e1000_clean_rx_irq_ps 4504 0.6162 vmlinux cache_alloc_refill 4133 0.5654 vmlinux radix_tree_delete Second PC CPU: P4 / Xeon with 2 hyper-threads, speed 3192.35 MHz (estimated) Counted GLOBAL_POWER_EVENTS events (time during which processor is not stopped) with a unit mask of 0x01 (mandatory) count 100000 samples % app name symbol name 37747 13.3616 sch_htb (no symbols) 23606 8.3560 vmlinux e1000_intr 18158 6.4275 cls_u32 (no symbols) 14726 5.2127 ip_tables (no symbols) 13137 4.6502 vmlinux e1000_irq_enable 12307 4.3564 sch_sfq (no symbols) 9974 3.5306 vmlinux mwait_idle_with_hints 9855 3.4884 vmlinux e1000_clean_rx_irq 9077 3.2131 vmlinux e1000_clean_tx_irq 7293 2.5816 vmlinux irq_entries_start 6956 2.4623 vmlinux ip_route_input 6652 2.3547 vmlinux e1000_xmit_frame 6202 2.1954 vmlinux dev_queue_xmit 4403 1.5586 vmlinux __kfree_skb 4230 1.4973 vmlinux net_rx_action 4224 1.4952 vmlinux e1000_clean 4042 1.4308 vmlinux __qdisc_run 3513 1.2435 vmlinux ip_rcv 3509 1.2421 vmlinux getnstimeofday 3377 1.1954 vmlinux rb_erase 3191 1.1295 vmlinux eth_type_trans 2953 1.0453 vmlinux handle_fasteoi_irq 2830 1.0018 vmlinux ip_output Looks great! I hope i found interesting place for optimization. Thanks. Slavon. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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