netdev - Re: packetloss, on e1000e worse than r8169?

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Date:	Mon, 16 Jun 2008 21:48:55 +0200
From:	Eric Dumazet <dada1@...mosbay.com>
To:	Denys Fedoryshchenko <denys@...p.net.lb>
Cc:	netdev@...r.kernel.org, linux.nics@...el.com
Subject: Re: packetloss, on e1000e worse than r8169?

Denys Fedoryshchenko a e'crit :
> Hi again
> 
> I moved from PCI Realtek 8169 to onboard PCI-Express e1000e, and situation
> become worse. Strange? Yes.
> 
> Here is info
> Load and error rate: 
> 
> MegaRouter-KARAM /sys # ifconfig eth1;sleep 10;ifconfig eth1
> eth1      Link encap:Ethernet  HWaddr 00:19:D1:71:5F:33
>           inet addr:192.168.20.10  Bcast:0.0.0.0  Mask:255.255.255.0
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:91991642 errors:0 dropped:1803444 overruns:0 frame:0
>           TX packets:91914611 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:316112765 (301.4 MiB)  TX bytes:138303107 (131.8 MiB)
>           Memory:90300000-90320000
> 
> eth1      Link encap:Ethernet  HWaddr 00:19:D1:71:5F:33
>           inet addr:192.168.20.10  Bcast:0.0.0.0  Mask:255.255.255.0
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:92812514 errors:0 dropped:1815490 overruns:0 frame:0
>           TX packets:92734865 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:739941322 (705.6 MiB)  TX bytes:560547138 (534.5 MiB)
>           Memory:90300000-90320000
> 
> System load (there is no NAT, no shapers, just routing, around 600-700 routes):
> MegaRouter-KARAM /sys # mpstat 1
> Linux 2.6.26-rc6-git2-build-0029 (MegaRouter-KARAM)     06/16/08
> 
> 22:36:36     CPU   %user   %nice    %sys %iowait    %irq   %soft  %steal  
> %idle    intr/s
> 22:36:37     all    0.00    0.00    0.00    0.00    0.00    1.49    0.00  
> 98.51  19764.00
> 22:36:38     all    0.00    0.00    0.50    0.00    0.00    0.50    0.00  
> 99.01  19888.00
> 22:36:39     all    0.00    0.00    0.00    0.00    0.00    0.50    0.00  
> 99.50  19642.00
> 22:36:40     all    0.00    0.00    0.00    0.00    1.01    9.05    0.00  
> 89.95  19543.00
> 
> (system almost idle)
> 
> MegaRouter-KARAM /sys # ethtool -S eth1
> NIC statistics:
>      rx_packets: 109977509
>      tx_packets: 109887692
>      rx_bytes: 57656749138
>      tx_bytes: 57536071746
>      rx_broadcast: 6497
>      tx_broadcast: 92
>      rx_multicast: 48995
>      tx_multicast: 1960
>      rx_errors: 0
>      tx_errors: 0
>      tx_dropped: 0
>      multicast: 48995
>      collisions: 0
>      rx_length_errors: 0
>      rx_over_errors: 0
>      rx_crc_errors: 0
>      rx_frame_errors: 0
>      rx_no_buffer_count: 1796
>      rx_missed_errors: 2182679
>      tx_aborted_errors: 0
>      tx_carrier_errors: 0
>      tx_fifo_errors: 0
>      tx_heartbeat_errors: 0
>      tx_window_errors: 0
>      tx_abort_late_coll: 0
>      tx_deferred_ok: 55617
>      tx_single_coll_ok: 0
>      tx_multi_coll_ok: 0
>      tx_timeout_count: 0
>      tx_restart_queue: 1626
>      rx_long_length_errors: 0
>      rx_short_length_errors: 0
>      rx_align_errors: 0
>      tx_tcp_seg_good: 0
>      tx_tcp_seg_failed: 0
>      rx_flow_control_xon: 55461
>      rx_flow_control_xoff: 57329
>      tx_flow_control_xon: 39114
>      tx_flow_control_xoff: 48341
>      rx_long_byte_count: 57656749138
>      rx_csum_offload_good: 104097306
>      rx_csum_offload_errors: 2209
>      rx_header_split: 0
>      alloc_rx_buff_failed: 0
>      tx_smbus: 22
>      rx_smbus: 2201
>      dropped_smbus: 0
>      rx_dma_failed: 0
>      tx_dma_failed: 0
> MegaRouter-KARAM /sys # ethtool -S eth1
> NIC statistics:
>      rx_packets: 110154571
>      tx_packets: 110064459
>      rx_bytes: 57753358981
>      tx_bytes: 57632419451
>      rx_broadcast: 6501
>      tx_broadcast: 92
>      rx_multicast: 49155
>      tx_multicast: 1960
>      rx_errors: 0
>      tx_errors: 0
>      tx_dropped: 0
>      multicast: 49155
>      collisions: 0
>      rx_length_errors: 0
>      rx_over_errors: 0
>      rx_crc_errors: 0
>      rx_frame_errors: 0
>      rx_no_buffer_count: 1796
>      rx_missed_errors: 2187703
>      tx_aborted_errors: 0
>      tx_carrier_errors: 0
>      tx_fifo_errors: 0
>      tx_heartbeat_errors: 0
>      tx_window_errors: 0
>      tx_abort_late_coll: 0
>      tx_deferred_ok: 55772
>      tx_single_coll_ok: 0
>      tx_multi_coll_ok: 0
>      tx_timeout_count: 0
>      tx_restart_queue: 1628
>      rx_long_length_errors: 0
>      rx_short_length_errors: 0
>      rx_align_errors: 0
>      tx_tcp_seg_good: 0
>      tx_tcp_seg_failed: 0
>      rx_flow_control_xon: 55615
>      rx_flow_control_xoff: 57488
>      tx_flow_control_xon: 39209
>      tx_flow_control_xoff: 48448
>      rx_long_byte_count: 57753358981
>      rx_csum_offload_good: 104264656
>      rx_csum_offload_errors: 2210
>      rx_header_split: 0
>      alloc_rx_buff_failed: 0
>      tx_smbus: 23
>      rx_smbus: 2207
>      dropped_smbus: 0
>      rx_dma_failed: 0
>      tx_dma_failed: 0
> 
> 
> 

What RX & TX rings look like on e1000e ?

ethtool -g eth1

Also, please post "cat /proc/interrupts"





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