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

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Date:	Tue, 17 Jun 2008 01:08:00 +0300
From:	"Denys Fedoryshchenko" <denys@...p.net.lb>
To:	Eric Dumazet <dada1@...mosbay.com>
Cc:	netdev@...r.kernel.org
Subject: Re: packetloss, on e1000e worse than r8169?

On Mon, 16 Jun 2008 23:44:07 +0200, Eric Dumazet wrote

opreport -l /mnt/flash/vmlinux |more
Here is oprofile
CPU: Core 2, speed 2397.64 MHz (estimated)
Counted CPU_CLK_UNHALTED events (Clock cycles when not halted) with a unit
mask of 0x00 (Unhalted core cycles) count 100000
samples  %        symbol name
25409    15.0068  mwait_idle
14330     8.4634  ip_route_input
7827      4.6227  irq_entries_start
6488      3.8319  dev_queue_xmit
5497      3.2466  __qdisc_run
5033      2.9725  __slab_free
3569      2.1079  native_read_tsc
3560      2.1026  ip_rcv
3520      2.0789  __alloc_skb
3435      2.0287  __kmalloc_track_caller
3381      1.9968  kmem_cache_alloc
3340      1.9726  ip_forward
3289      1.9425  kfree

MegaRouter-KARAM /lib # opreport
CPU: Core 2, speed 2397.64 MHz (estimated)
Counted CPU_CLK_UNHALTED events (Clock cycles when not halted) with a unit
mask of 0x00 (Unhalted core cycles) count 100000
CPU_CLK_UNHALT...|
  samples|      %|
------------------
   612990 64.5673 vmlinux
   276274 29.1004 e1000e
    31470  3.3148 ip_tables
     9676  1.0192 libzebra.so.0.0.0
     3763  0.3964 oprofiled

MegaRouter-KARAM ~ # opreport image:/e1000e -l
CPU: Core 2, speed 2397.64 MHz (estimated)
Counted CPU_CLK_UNHALTED events (Clock cycles when not halted) with a unit
mask of 0x00 (Unhalted core cycles) count 100000
warning: could not check that the binary file /e1000e has not been modified
since the profile was taken. Results may be inaccurate.
samples  %        symbol name
144449   25.7521  e1000_irq_enable
97006    17.2941  e1000_intr_msi
95009    16.9380  e1000_clean_rx_irq
87833    15.6587  e1000_xmit_frame
53723     9.5776  e1000_clean_tx_irq
26546     4.7326  e1000_clean
19968     3.5599  e1000_alloc_rx_buffers
11941     2.1288  e1000_receive_skb
6578      1.1727  e1000_update_itr
5864      1.0454  e1000_desc_unused
4847      0.8641  e1000_maybe_stop_tx
3537      0.6306  e1000_put_txbuf
3490      0.6222  e1000_rx_checksum
107       0.0191  e1000e_update_stats
9         0.0016  e1000_acquire_swflag_ich8lan
7         0.0012  e1000_release_swflag_ich8lan
5        8.9e-04  e1000e_read_phy_reg_mdic
1        1.8e-04  e1000_get_settings
1        1.8e-04  e1000_ioctl



--
Denys Fedoryshchenko
Technical Manager
Virtual ISP S.A.L.

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