netdev - Re: [PATCH net-next 00/10] bnxt

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Date:   Tue, 31 Jan 2017 22:22:12 -0800
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Andy Gospodarek <andy@...yhouse.net>
Cc:     Michael Chan <michael.chan@...adcom.com>,
        David Miller <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next 00/10] bnxt_en: Add XDP support.

On Tue, Jan 31, 2017 at 9:33 PM, Andy Gospodarek <andy@...yhouse.net> wrote:
> On Tue, Jan 31, 2017 at 10:36 AM, Andy Gospodarek <andy@...yhouse.net> wrote:
>> On Mon, Jan 30, 2017 at 08:47:47PM -0800, Alexei Starovoitov wrote:
>>> On Mon, Jan 30, 2017 at 08:49:25PM -0500, Michael Chan wrote:
>>> > The first 8 patches refactor the code (rx/tx code paths and ring logic)
>>> > and add the basic infrastructure to support XDP.  The 9th patch adds
>>> > basic ndo_xdp to support XDP_DROP and XDP_PASS only.  The 10th patch
>>> > completes the series with XDP_TX.
>>>
>>> Looks great.
>>> Could you please share performance numbers ?
>>
>> I'll post some later today.
>
> I finally got my system moved around to what I'd hoped would be the
> right spot in my lab, but the system used for generating the traffic
> was only able to send 6Mpps with pktgen, so it was not a great test.
>
> My receiving system with i7-6700 CPU @ 3.40GHz seemed to have no issue
> handling this 6Mpps load -- mpstat showed only one core was ~25%
> utilitzed with all of that servicing softirqs.  The rest of the cores
> were 100% idle.
>
> I'm going to search for other traffic generation tools/systems to make
> sure I can get at least line-rate for the 10GbE cards I was using.

hmm. last time I tried pktgen on bnx2x it was easily doing 14Mpps with burst on.
Have you been using samples/pktgen/pktgen_sample03_burst_single_flow.sh ?
Waiting for this set to land to start benchmarking on bnxt.
So having a baseline will certainly help :)

Thanks!