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Date: Thu, 07 Apr 2011 13:46:51 +0200 From: Eric Dumazet <eric.dumazet@...il.com> To: Wei Gu <wei.gu@...csson.com> Cc: netdev <netdev@...r.kernel.org>, Alexander Duyck <alexander.h.duyck@...el.com>, Jeff Kirsher <jeffrey.t.kirsher@...el.com> Subject: RE: Low performance Intel 10GE NIC (3.2.10) on 2.6.38 Kernel Le jeudi 07 avril 2011 à 19:15 +0800, Wei Gu a écrit : > Hi, > I compile the ixgbe driver into the kernel and run the test again and also change the copy to clone in the fw hook > This is the perf report while I was forwarding 150Kpps with > The attached file include the basic info about my test system. Please let me know if I did some thing wrong. > > + 71.91% swapper [kernel.kallsyms] [k] poll_idle > + 10.43% swapper [kernel.kallsyms] [k] intel_idle > - 8.00% ksoftirqd/24 [kernel.kallsyms] [k] _raw_spin_unlock_irqrestore > \u2592 - _raw_spin_unlock_irqrestore > \u2592 - 42.25% alloc_iova > \u2592 intel_alloc_iova > \u2592 __intel_map_single > \u2592 intel_map_page > \u2592 - dma_map_single_attrs.clone.3 > \u2592 + 59.89% ixgbe_alloc_rx_buffers > \u2592 - 40.11% ixgbe_xmit_frame_ring > \u2592 ixgbe_xmit_frame > \u2592 dev_hard_start_xmit > \u2592 sch_direct_xmit > \u2592 dev_queue_xmit > \u2592 vlan_dev_hard_start_xmit > \u2592 hook_func > \u2592 nf_iterate > \u2592 nf_hook_slow > \u2592 NF_HOOK.clone.1 > \u2592 ip_rcv > \u2592 __netif_receive_skb > \u2592 __netif_receive_skb > \u2592 netif_receive_skb > \u2592 napi_skb_finish > \u2592 napi_gro_receive > \u2592 ixgbe_clean_rx_irq > \u2592 ixgbe_clean_rxtx_many > \u2592 net_rx_action > \u2592 __do_softirq > \u2592 + call_softirq > \u2592 + 36.30% find_iova > \u2592 + 20.89% add_unmap > \u2592+ 1.60% kworker/24:1 [kernel.kallsyms] [k] _raw_spin_unlock_irqrestore > \u2592+ 0.80% swapper [kernel.kallsyms] [k] _raw_spin_unlock_irqrestore > \u2592+ 0.66% snmpd [kernel.kallsyms] [k] snmp_fold_field > \u2592+ 0.53% ksoftirqd/24 [kernel.kallsyms] [k] clflush_cache_range > > > If I zoom out to this ksoftirqd/24 > + 80.38% ksoftirqd/24 [kernel.kallsyms] [k] _raw_spin_unlock_irqrestore > + 5.35% ksoftirqd/24 [kernel.kallsyms] [k] clflush_cache_range > + 1.49% ksoftirqd/24 [kernel.kallsyms] [k] __domain_mapping > + 0.84% ksoftirqd/24 [kernel.kallsyms] [k] kmem_cache_alloc > + 0.55% ksoftirqd/24 [kernel.kallsyms] [k] _raw_spin_lock > + 0.54% ksoftirqd/24 [kernel.kallsyms] [k] ixgbe_xmit_frame_ring > + 0.52% ksoftirqd/24 [kernel.kallsyms] [k] ixgbe_clean_rx_irq > + 0.50% ksoftirqd/24 [kernel.kallsyms] [k] domain_get_iommu > + 0.49% ksoftirqd/24 [kernel.kallsyms] [k] dma_map_single_attrs.clone.3 > + 0.48% ksoftirqd/24 [kernel.kallsyms] [k] kmem_cache_free > > Perf top > > --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- > PerfTop: 10615 irqs/sec kernel:99.7% exact: 0.0% [1000Hz cpu-clock-msecs], (all, 64 CPUs) > --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- > > samples pcnt function DSO > _______ _____ _______________________________ __________________________________________________________________________ > > 11786.00 54.9% intel_idle [kernel.kallsyms] > 7180.00 33.4% _raw_spin_unlock_irqrestore [kernel.kallsyms] > 469.00 2.2% clflush_cache_range [kernel.kallsyms] > 138.00 0.6% __domain_mapping [kernel.kallsyms] > 81.00 0.4% dso__find_symbol /root/rpmbuild/BUILD/kernel-2.6.38.el6/linux-2.6.38.x86_64/tools/perf/perf > 73.00 0.3% _raw_spin_lock [kernel.kallsyms] > 72.00 0.3% dso__load_sym.clone.0 /root/rpmbuild/BUILD/kernel-2.6.38.el6/linux-2.6.38.x86_64/tools/perf/perf > 68.00 0.3% kmem_cache_alloc [kernel.kallsyms] > 53.00 0.2% symbol_filter /root/rpmbuild/BUILD/kernel-2.6.38.el6/linux-2.6.38.x86_64/tools/perf/perf > 51.00 0.2% domain_get_iommu [kernel.kallsyms] > 44.00 0.2% ixgbe_clean_rx_irq [kernel.kallsyms] > 42.00 0.2% kmem_cache_free [kernel.kallsyms] > 42.00 0.2% ixgbe_xmit_frame_ring [kernel.kallsyms] > 41.00 0.2% ixgbe_clean_tx_irq [kernel.kallsyms] > 40.00 0.2% dma_map_single_attrs.clone.3 [kernel.kallsyms] > > > Top: > > Tasks: 425 total, 2 running, 423 sleeping, 0 stopped, 0 zombie > Cpu(s): 0.0%us, 0.0%sy, 0.0%ni, 96.0%id, 0.0%wa, 0.0%hi, 3.9%si, 0.0%st > Mem: 264733684k total, 6374016k used, 258359668k free, 43720k buffers > Swap: 4194300k total, 0k used, 4194300k free, 137308k cached > > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ P COMMAND > 79 root 20 0 0 0 0 R 38.8 0.0 29:22.85 24 ksoftirqd/24 > 233 root 20 0 0 0 0 S 7.6 0.0 4:06.60 24 kworker/24:1 > 1538 root 20 0 0 0 0 S 0.3 0.0 0:00.78 33 kworker/33:3 > 2271 root 20 0 200m 5564 1460 S 0.3 0.0 0:03.31 2 snmpd > > > Thanks > WeiGu OK, please send your .config file -- 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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