Date: Tue, 24 Jan 2017 16:27:57 +0100 From: =?UTF-8?Q?Olivier_Cochard=2DLabb=C3=A9?= <olivier@freebsd.org> To: Sean Bruno <sbruno@freebsd.org> Cc: Matthew Macy <mmacy@nextbsd.org>, "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, "freebsd-current@freebsd.org" <freebsd-current@freebsd.org> Subject: Re: HEADS-UP: IFLIB implementations of sys/dev/e1000 em, lem, igb pending Message-ID: <CA%2Bq%2BTcpcZUJTmycPBF9kS-x4qcqN7V3LdHW=BQ3ttzXLyU3FWw@mail.gmail.com> In-Reply-To: <ad7fdc31-b0dd-2105-1610-cf0f3de42245@freebsd.org> References: <30f21c75-d3a2-edcd-1999-d5ed9f970c06@freebsd.org> <b000a957-8d17-a04d-6275-0d3920aa8a17@freebsd.org> <CA%2Bq%2BTcramTrYgYT-s%2B=aBZzRJV8FmKQqGt=1twPhLBR7AoXkcQ@mail.gmail.com> <1598d97bf2a.c6bcb76838987.6501340920645175463@nextbsd.org> <574a7ac7-4842-9518-8286-a4d89a9f7a27@freebsd.org> <CA%2Bq%2BTco-dcoU8EZnDEzgoK-v2Q2=U5GF6ASMSj0kwzd_wB5xig@mail.gmail.com> <6c6cb534-73c7-464b-8af1-7445a9c0188c@freebsd.org> <1598f29d379.ea6360351471.8752933472741761813@nextbsd.org> <CA%2Bq%2BTcpUXXPEQtdMFup6EZzyCKs9Ep%2BnS5SB%2Bfm6bSJSDs34_w@mail.gmail.com> <1598f3f8588.d20017893749.339651164872952258@nextbsd.org> <1598f42ad77.eeec05be4113.9201780237587761460@nextbsd.org> <CA%2Bq%2BTcp5LwrnXt75tNpYpAr1KWx9YpLx5kMHhPR%2BYgAs__n1eA@mail.gmail.com> <159902b73ed.10775291e21533.7488368455500235608@nextbsd.org> <CA%2Bq%2BTcpHmuOGyp5A290WmUvGTnOSse7v8gj4=R8kZ=m51-_s4A@mail.gmail.com> <18abdd64-08a6-50ca-fb6b-9c01a3d7b60c@freebsd.org> <CA%2Bq%2BTcptEN5pcScYo4j3O8OuJHEacZu9ugOz_6b2iFb-CzBFXA@mail.gmail.com> <ad7fdc31-b0dd-2105-1610-cf0f3de42245@freebsd.org>
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On Tue, Jan 24, 2017 at 3:17 PM, Sean Bruno <sbruno@freebsd.org> wrote:
>
>
> Did you increase the number of rx/tx rings to 8 and the number of
> descriptors to 4k in your tests or just the defaults?
>
Tuning are same as described in my previous email (rxd|txd=2048, rx|tx
process_limit=-1, max_interrupt_rate=16000).
[root@apu2]~# sysctl hw.igb.
hw.igb.tx_process_limit: -1
hw.igb.rx_process_limit: -1
hw.igb.num_queues: 0
hw.igb.header_split: 0
hw.igb.max_interrupt_rate: 16000
hw.igb.enable_msix: 1
hw.igb.enable_aim: 1
hw.igb.txd: 2048
hw.igb.rxd: 2048
But I've did a new benchs with default setting, and the performance drop is
now about -25% :
x head r311848 packets-per-second (default settings)
+ head r311849 packets-per-second (default settings)
+--------------------------------------------------------------------------+
|+ |
|+ x |
|+ xx|
|++ xx|
| A||
|A| |
+--------------------------------------------------------------------------+
N Min Max Median Avg Stddev
x 5 618711 621135 619930.5 619840.8 951.83787
+ 5 467389 468740 467778 467864.8 550.40322
Difference at 95.0% confidence
-151976 +/- 1133.9
-24.5186% +/- 0.150581%
(Student's t, pooled s = 777.476)
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