netdev - Re: Difficulties to get 1Gbps on be2net ethernet card

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Message-ID: <CAL8zT=hKmnAG7kZE18noFNEksibvJpR_6Q9z59nGLhqbs5oxuw@mail.gmail.com>
Date:	Tue, 12 Jun 2012 11:01:23 +0200
From:	Jean-Michel Hautbois <jhautbois@...il.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Sathya.Perla@...lex.com, netdev@...r.kernel.org
Subject: Re: Difficulties to get 1Gbps on be2net ethernet card

2012/6/12 Eric Dumazet <eric.dumazet@...il.com>:
> On Tue, 2012-06-12 at 10:24 +0200, Jean-Michel Hautbois wrote:
>> 2012/6/8 Jean-Michel Hautbois <jhautbois@...il.com>:
>> > 2012/6/8 Eric Dumazet <eric.dumazet@...il.com>:
>> >> On Fri, 2012-06-08 at 10:14 +0200, Jean-Michel Hautbois wrote:
>> >>> 2012/6/8 Eric Dumazet <eric.dumazet@...il.com>:
>> >>> > On Thu, 2012-06-07 at 14:54 +0200, Jean-Michel Hautbois wrote:
>> >>> >
>> >>> >> eth1      Link encap:Ethernet  HWaddr 68:b5:99:b9:8d:d4
>> >>> >>           UP BROADCAST RUNNING SLAVE MULTICAST  MTU:4096  Metric:1
>> >>> >>           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>> >>> >>           TX packets:15215387 errors:0 dropped:0 overruns:0 carrier:0
>> >>> >>           collisions:0 txqueuelen:1000
>> >>> >>           RX bytes:0 (0.0 B)  TX bytes:61476524359 (57.2 GiB)
>> >>> >
>> >>> >> qdisc mq 0: dev eth1 root
>> >>> >>  Sent 61476524359 bytes 15215387 pkt (dropped 45683472, overlimits 0
>> >>> >> requeues 17480)
>> >>> >
>> >>> > OK, and "tc -s -d cl show dev eth1"
>> >>> >
>> >>> > (How many queues are really used)
>> >>> >
>> >>> >
>> >>> >
>> >>>
>> >>> tc -s -d cl show dev eth1
>> >>> class mq :1 root
>> >>>  Sent 9798071746 bytes 2425410 pkt (dropped 3442405, overlimits 0 requeues 2747)
>> >>>  backlog 0b 0p requeues 2747
>> >>> class mq :2 root
>> >>>  Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
>> >>>  backlog 0b 0p requeues 0
>> >>> class mq :3 root
>> >>>  Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
>> >>>  backlog 0b 0p requeues 0
>> >>> class mq :4 root
>> >>>  Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
>> >>>  backlog 0b 0p requeues 0
>> >>> class mq :5 root
>> >>>  Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
>> >>>  backlog 0b 0p requeues 0
>> >>> class mq :6 root
>> >>>  Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
>> >>>  backlog 0b 0p requeues 0
>> >>> class mq :7 root
>> >>>  Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
>> >>>  backlog 0b 0p requeues 0
>> >>> class mq :8 root
>> >>>  Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
>> >>>  backlog 0b 0p requeues 0
>> >>
>> >>
>> >> Do you have the same distribution on old kernels as well ?
>> >> (ie only queue 0 is used)
>> >>
>> >>
>> >>
>> >
>> > On the old kernel, there is nothing returned by this command.
>> >
>> > JM
>>
>> I used perf in order to get more information.
>
> What happens if you force some traffic in the other way (say 50.000
> (small) packets per second in RX) while doing your tests ?
>

Can I do that using netperf ?
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