Re: Proposal: New Frame Size Text (was: Re: Design Issue: Frame Size Items)
Roberto Peon <grmocg@gmail.com> Sat, 11 May 2013 01:32 UTC
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Date: Fri, 10 May 2013 18:30:24 -0700
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From: Roberto Peon <grmocg@gmail.com>
To: James M Snell <jasnell@gmail.com>
Cc: "William Chan (陈智昌)" <willchan@chromium.org>, Poul-Henning Kamp <phk@phk.freebsd.dk>, "ietf-http-wg@w3.org" <ietf-http-wg@w3.org>, Martin Thomson <martin.thomson@gmail.com>, Hasan Khalil <hkhalil@google.com>
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Subject: Re: Proposal: New Frame Size Text (was: Re: Design Issue: Frame Size Items)
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The memory needed for header interpretation will, for a decent implementation, be at worst the sum of the size of the compression context and the size of the receive buffer-- it will not expand once decompressed unless a lot of useless copying is being done. -=R On Fri, May 10, 2013 at 2:08 PM, James M Snell <jasnell@gmail.com> wrote: > On Fri, May 10, 2013 at 1:00 PM, William Chan (陈智昌) > <willchan@chromium.org> wrote: > [snip] > >> > >> I do not presume the Window to be static at all. In fact, quite the > >> opposite, I expect it to be quite variable. I do not want header > frames > >> that are beyond an endpoints ability to process at any given point in > time. > >> It's conceivable that if the widow size is 0, the receiver really > doesn't > >> want the sender to initiate any new requests or to send arbitrarily > large > >> blocks of headers. > > > > I don't get it. Then what does a halfway stance buy you? If you really > want > > to prevent them from sending data, say that headers are included in flow > > control. If you're only shrinking the max frame size, but we can use a > frame > > continuation bit, or there's a lower-bound on the frame-size, then the > > receiver isn't able to prevent the sender from sending arbitrary amounts > of > > header data, but it's just forcing the sender to break it up into smaller > > frame sizes. > >> > > It's not about preventing the data from being sent at all, it's about > breaking it up into smaller, more manageable chunks that are easier to > preempt and deal with incrementally. > > If an endpoint says that it's only capable of handling 10k of data at > a time, whats the utility in sending a single frame containing 64k of > compressed header data that could potentially expand significantly > once decompressed? > > - James > > >> >> > >> >> > >> >> - James > >> >> > >> >> > I don't see any real benefits for limiting control frames to > anything > >> >> > having > >> >> > to do with the window size as compared to sending a SETTING and > >> >> > having the > >> >> > default before there and having it completely decoupled from window > >> >> > size, > >> >> > and I do see a number of complications and ewws :/ > >> >> > -=R > >> >> > > >> >> > > >> >> > On Fri, May 10, 2013 at 10:58 AM, Hasan Khalil <hkhalil@google.com > > > >> >> > wrote: > >> >> >> > >> >> >> While I love the idea of limiting frames to 65535B, I hate the > idea > >> >> >> of a > >> >> >> continuation bit. > >> >> >> > >> >> >> -Hasan > >> >> >> > >> >> >> > >> >> >> On Fri, May 10, 2013 at 1:54 PM, Martin Thomson > >> >> >> <martin.thomson@gmail.com> > >> >> >> wrote: > >> >> >>> > >> >> >>> On 10 May 2013 10:40, William Chan (陈智昌) <willchan@chromium.org> > >> >> >>> wrote: > >> >> >>> > [...] are we going to move forward with the frame > >> >> >>> > continuation bit? > >> >> >>> > >> >> >>> I think that this was implicit in our decision to limit frames to > >> >> >>> 65535 bytes (or less). > >> >> >> > >> >> >> > >> >> > > >> > > >> > > > > > >
- Proposal: New Frame Size Text (was: Re: Design Is… James M Snell
- Re: Proposal: New Frame Size Text (was: Re: Desig… William Chan (陈智昌)
- Re: Proposal: New Frame Size Text (was: Re: Desig… James M Snell
- Re: Proposal: New Frame Size Text (was: Re: Desig… James M Snell
- Re: Proposal: New Frame Size Text (was: Re: Desig… Roberto Peon
- Re: Proposal: New Frame Size Text (was: Re: Desig… James M Snell
- Re: Proposal: New Frame Size Text (was: Re: Desig… William Chan (陈智昌)
- Re: Proposal: New Frame Size Text (was: Re: Desig… Martin Thomson
- Re: Proposal: New Frame Size Text (was: Re: Desig… Martin Thomson
- Re: Proposal: New Frame Size Text (was: Re: Desig… James M Snell
- Re: Proposal: New Frame Size Text (was: Re: Desig… James M Snell
- Re: Proposal: New Frame Size Text (was: Re: Desig… Martin Thomson
- Re: Proposal: New Frame Size Text (was: Re: Desig… William Chan (陈智昌)
- Re: Proposal: New Frame Size Text (was: Re: Desig… William Chan (陈智昌)
- Re: Proposal: New Frame Size Text (was: Re: Desig… Poul-Henning Kamp
- Re: Proposal: New Frame Size Text (was: Re: Desig… James M Snell
- Re: Proposal: New Frame Size Text (was: Re: Desig… Roberto Peon
- Re: Proposal: New Frame Size Text (was: Re: Desig… William Chan (陈智昌)
- Re: Proposal: New Frame Size Text (was: Re: Desig… Roberto Peon
- Re: Proposal: New Frame Size Text (was: Re: Desig… Poul-Henning Kamp
- Re: Proposal: New Frame Size Text (was: Re: Desig… James M Snell
- Re: Proposal: New Frame Size Text Martin J. Dürst
- Re: Proposal: New Frame Size Text (was: Re: Desig… Roberto Peon
- Re: Proposal: New Frame Size Text (was: Re: Desig… Martin Thomson
- Re: Proposal: New Frame Size Text (was: Re: Desig… Roberto Peon
- Re: Proposal: New Frame Size Text Poul-Henning Kamp
- Re: Proposal: New Frame Size Text (was: Re: Desig… James M Snell
- Re: Proposal: New Frame Size Text (was: Re: Desig… William Chan (陈智昌)
- Re: Proposal: New Frame Size Text (was: Re: Desig… Ben Niven-Jenkins
- Re: Proposal: New Frame Size Text (was: Re: Desig… Poul-Henning Kamp
- Re: Proposal: New Frame Size Text (was: Re: Desig… William Chan (陈智昌)
- Re: Proposal: New Frame Size Text (was: Re: Desig… James M Snell
- Re: Proposal: New Frame Size Text (was: Re: Desig… Poul-Henning Kamp
- Re: Proposal: New Frame Size Text (was: Re: Desig… Martin Thomson
- Re: Proposal: New Frame Size Text (was: Re: Desig… James M Snell
- Re: Proposal: New Frame Size Text (was: Re: Desig… James M Snell
- Re: Proposal: New Frame Size Text (was: Re: Desig… Patrick McManus