netdev - Re: [PATCH v2] bnx2x: Support for managing RX indirection table

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Date:	Thu, 17 Feb 2011 10:09:24 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Tom Herbert <therbert@...gle.com>
Cc:	davem@...emloft.net, eilong@...adcom.com, netdev@...r.kernel.org
Subject: Re: [PATCH v2] bnx2x: Support for managing RX indirection table

Le mercredi 16 février 2011 à 12:27 -0800, Tom Herbert a écrit :
> Support fetching and retrieving RX indirection table via ethtool.
> 
> Signed-off-by: Tom Herbert <therbert@...gle.com>
> ---
>  drivers/net/bnx2x/bnx2x.h         |    2 +
>  drivers/net/bnx2x/bnx2x_ethtool.c |   56 +++++++++++++++++++++++++++++++++++++
>  drivers/net/bnx2x/bnx2x_main.c    |   22 +++++++++++---
>  3 files changed, 75 insertions(+), 5 deletions(-)

Acked-by: Eric Dumazet <eric.dumazet@...il.com>


As this is a bit unusual stuff (ethtool -X), I guess some hints can be
useful to testers and admins :

I tested this patch on my dev machine

Broadcom Corporation NetXtreme II BCM57711E 10Gigabit PCIe
(Hewlett-Packard Company NC532i Dual Port 10GbE Multifunction BL-C
Adapter)


# ethtool -X eth1 weight 0 1 0 2 0 4 0 8 0 16 0 32
# ethtool -x eth1 
RX flow hash indirection table for eth1 with 16 RX ring(s):
    0:      1     1     3     3     3     3     5     5
    8:      5     5     5     5     5     5     7     7
   16:      7     7     7     7     7     7     7     7
   24:      7     7     7     7     7     7     9     9
   32:      9     9     9     9     9     9     9     9
   40:      9     9     9     9     9     9     9     9
   48:      9     9     9     9     9     9     9     9
   56:      9     9     9     9     9     9    11    11
   64:     11    11    11    11    11    11    11    11
   72:     11    11    11    11    11    11    11    11
   80:     11    11    11    11    11    11    11    11
   88:     11    11    11    11    11    11    11    11
   96:     11    11    11    11    11    11    11    11
  104:     11    11    11    11    11    11    11    11
  112:     11    11    11    11    11    11    11    11
  120:     11    11    11    11    11    11    11    11


After some (distributed) trafic on eth1 I get :

[root@...voipvnx021 ~]# ethtool -S eth1|grep rx_ucast_packets
     [0]: rx_ucast_packets: 62
     [1]: rx_ucast_packets: 15870
     [2]: rx_ucast_packets: 9
     [3]: rx_ucast_packets: 31507
     [4]: rx_ucast_packets: 0
     [5]: rx_ucast_packets: 63106
     [6]: rx_ucast_packets: 0
     [7]: rx_ucast_packets: 122051
     [8]: rx_ucast_packets: 1
     [9]: rx_ucast_packets: 248071
     [10]: rx_ucast_packets: 0
     [11]: rx_ucast_packets: 519864
     [12]: rx_ucast_packets: 0
     [13]: rx_ucast_packets: 0
     [14]: rx_ucast_packets: 0
     [15]: rx_ucast_packets: 0
     rx_ucast_packets: 1000541


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