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Re: [tcpm] [EXTERNAL] Re: Poll for CUBIC RFC updates

Praveen Balasubramanian <pravb@microsoft.com> Tue, 17 November 2020 17:50 UTC

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From: Praveen Balasubramanian <pravb@microsoft.com>
To: "rs.ietf@gmx.at" <rs.ietf@gmx.at>, "vidhi_goel=40apple.com@dmarc.ietf.org" <vidhi_goel=40apple.com@dmarc.ietf.org>, "tcpm@ietf.org" <tcpm@ietf.org>
Thread-Topic: [EXTERNAL] Re: [tcpm] Poll for CUBIC RFC updates
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Subject: Re: [tcpm] [EXTERNAL] Re: Poll for CUBIC RFC updates
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Agreed, the below changes are useful and we would adopt them for the Windows TCP implementation. 

-----Original Message-----
From: tcpm <tcpm-bounces@ietf.org> On Behalf Of Scheffenegger, Richard
Sent: Monday, November 16, 2020 10:30 PM
To: Vidhi Goel <vidhi_goel=40apple.com@dmarc.ietf.org>; tcpm@ietf.org Extensions <tcpm@ietf.org>
Subject: [EXTERNAL] Re: [tcpm] Poll for CUBIC RFC updates

We have been working on improving the FreeBSD Cubic implementation, to bring it up from the originally implemented (early draft) version of Cubic, to a more production ready state which is inline with the adopted RFC version.

Having said this, the below changes sound reasonable and I will try to adopt them for FreeBSD.

Richard


Am 17.11.2020 um 03:08 schrieb Vidhi Goel:
> Hello,
>
> As Lars mentioned earlier, there are a couple of issues/proposals 
> filed for updating the CUBIC RFC 8312 and are currently under 
> discussion. The GitHub repo is at https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FNTAP%2Frfc8312bis&amp;data=04%7C01%7Cpravb%40microsoft.com%7C9d4e5956e1ad4ac34fcf08d88ac23ac7%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C1%7C637411914695336574%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=BVjKhWEzDza%2FpugYvkIyC4mSeTnOtfuAbS3EIh2M7a0%3D&amp;reserved=0.
> We would like to gather information on which CUBIC implementations 
> already or would be ready to adopt these changes.
>
> 1. Update K definition (Eq. 2) to account for Fast Convergence Issue 
> link 
> https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgith
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> 0 Linux already has this change. Apple's Cubic implementation for both 
> TCP and QUIC already use this.
>
> 2. Congestion window TCP friendly region after W_max Issue link 
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> 0 This is a suggestion to improve performance after cwnd > W_max. 
> Apple's Cubic implementation for both TCP and QUIC already use this.
>
>  From my experience, these changes would improve Cubic’s performance.
>
> Please let us know if you already or would be ready to implement these 
> changes in your CUBIC’s implementation.
>
> Thanks,
> Vidhi
>
> _______________________________________________
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