[Bloat] bloat at gigE

[Bloat] bloat at gigE

[Dave Taht]

I have been enjoying the more unusual bloat results, and where they
come from. Here's a cool one.

http://www.dslreports.com/speedtest/1424935

-- 
Dave Täht
endo is a terrible disease: http://www.gofundme.com/SummerVsEndo

Re: [Bloat] bloat at gigE

[Benjamin Cronce]

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The upload wasn't even saturated. Probably why upload bloat was very low.
Large bloat on the download just shows you the server really can push more
than 1Gb. 200ms bloat with 913Mb down is about 20MiB of buffer. That's
insane! That's about 20x more buffer than my entire 24 port 1Gb Procurve
managed switch. What kind of network equipment has that much buffer?

On Wed, Sep 23, 2015 at 3:34 AM, Dave Taht <dave.taht@gmail.com> wrote:

> I have been enjoying the more unusual bloat results, and where they
> come from. Here's a cool one.
>
> http://www.dslreports.com/speedtest/1424935
>
> --
> Dave Täht
> endo is a terrible disease: http://www.gofundme.com/SummerVsEndo
> _______________________________________________
> Bloat mailing list
> Bloat@lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/bloat
>

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Re: [Bloat] bloat at gigE

[Steinar H. Gunderson]

On Wed, Sep 23, 2015 at 07:10:33AM -0500, Benjamin Cronce wrote:
> The upload wasn't even saturated. Probably why upload bloat was very low.
> Large bloat on the download just shows you the server really can push more
> than 1Gb. 200ms bloat with 913Mb down is about 20MiB of buffer. That's
> insane! That's about 20x more buffer than my entire 24 port 1Gb Procurve
> managed switch. What kind of network equipment has that much buffer?

When I ran the bufferbloat test last time, I got pretty much exactly 250 ms
bloat at 1 GigE. That's ~30 MB. The equipment at the other end (where I
suppose the bloat was) was a Juniper MX960.

/* Steinar */
-- 
Homepage: http://www.sesse.net/

Re: [Bloat] bloat at gigE

[Mikael Abrahamsson]

On Wed, 23 Sep 2015, Benjamin Cronce wrote:

> The upload wasn't even saturated. Probably why upload bloat was very low.
> Large bloat on the download just shows you the server really can push more
> than 1Gb. 200ms bloat with 913Mb down is about 20MiB of buffer. That's
> insane! That's about 20x more buffer than my entire 24 port 1Gb Procurve
> managed switch. What kind of network equipment has that much buffer?

That's typically one distinction between L3 switch and a "router". The L3 
switch typically has on-die memory that can be as low as 128KB or up to a 
few megabytes of memory.

Then you have the real "service edge" routers with 128.000 queues that's 
used to aggregate tens of thousands of customers, where a linecard can 
have many gigabytes of packet buffer memory.

-- 
Mikael Abrahamsson    email: swmike@swm.pp.se