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Date: Wed, 29 Apr 2009 13:21:34 +0300 From: Radu Rendec <radu.rendec@...s.ro> To: Jesper Dangaard Brouer <hawk@...u.dk> Cc: Jarek Poplawski <jarkao2@...il.com>, Denys Fedoryschenko <denys@...p.net.lb>, netdev <netdev@...r.kernel.org> Subject: Re: htb parallelism on multi-core platforms Thanks for the oprofile newbie guide - it saved much time and digging through man pages. Normal report looks like this: samples % image name app name symbol name 38424 30.7350 cls_u32.ko cls_u32 u32_classify 5321 4.2562 e1000e.ko e1000e e1000_clean_rx_irq 4690 3.7515 vmlinux vmlinux ipt_do_table 3825 3.0596 sch_htb.ko sch_htb htb_dequeue 3458 2.7660 vmlinux vmlinux __hash_conntrack 2597 2.0773 vmlinux vmlinux nf_nat_setup_info 2531 2.0245 vmlinux vmlinux kmem_cache_alloc 2229 1.7830 vmlinux vmlinux ip_route_input 1722 1.3774 vmlinux vmlinux nf_conntrack_in 1547 1.2374 sch_htb.ko sch_htb htb_enqueue 1519 1.2150 vmlinux vmlinux kmem_cache_free 1471 1.1766 vmlinux vmlinux __slab_free 1435 1.1478 vmlinux vmlinux dev_queue_xmit 1313 1.0503 vmlinux vmlinux __qdisc_run 1277 1.0215 vmlinux vmlinux netif_receive_skb All other symbols are below 1%. sch_htb.ko report is this: samples % image name symbol name ------------------------------------------------------------------------------- 3825 49.0762 sch_htb.ko htb_dequeue 3825 100.000 sch_htb.ko htb_dequeue [self] ------------------------------------------------------------------------------- 1547 19.8486 sch_htb.ko htb_enqueue 1547 100.000 sch_htb.ko htb_enqueue [self] ------------------------------------------------------------------------------- 608 7.8009 sch_htb.ko htb_lookup_leaf 608 100.000 sch_htb.ko htb_lookup_leaf [self] ------------------------------------------------------------------------------- 459 5.8891 sch_htb.ko htb_deactivate_prios 459 100.000 sch_htb.ko htb_deactivate_prios [self] ------------------------------------------------------------------------------- 417 5.3503 sch_htb.ko htb_add_to_wait_tree 417 100.000 sch_htb.ko htb_add_to_wait_tree [self] ------------------------------------------------------------------------------- 372 4.7729 sch_htb.ko htb_change_class_mode 372 100.000 sch_htb.ko htb_change_class_mode [self] ------------------------------------------------------------------------------- 276 3.5412 sch_htb.ko htb_activate_prios 276 100.000 sch_htb.ko htb_activate_prios [self] ------------------------------------------------------------------------------- 189 2.4249 sch_htb.ko htb_add_to_id_tree 189 100.000 sch_htb.ko htb_add_to_id_tree [self] ------------------------------------------------------------------------------- 101 1.2959 sch_htb.ko htb_safe_rb_erase 101 100.000 sch_htb.ko htb_safe_rb_erase [self] ------------------------------------------------------------------------------- Am I misinterpreting the results, or does it look like the real problem is actually packet classification? Thanks, Radu Rendec On Tue, 2009-04-28 at 12:15 +0200, Jesper Dangaard Brouer wrote: > Remember to keep/copy the file "vmlinux". > > Here is the steps I usually use: > > opcontrol --vmlinux=/boot/vmlinux-`uname -r` > > opcontrol --stop > opcontrol --reset > opcontrol --start > > <perform stuff that needs profiling> > > opcontrol --stop > > "Normal" report > opreport --symbols --image-path=/lib/modules/`uname -r`/kernel/ | less > > Looking at specific module "sch_htb" > > opreport --symbols -cl sch_htb.ko --image-path=/lib/modules/`uname > -r`/kernel/ -- 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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