Re: [Bloat] [Cake] [Rpm] [Make-wifi-fast] The most wonderful video ever about bufferbloat

2022-10-19 Thread David Lang via Bloat
Thanks, and how long does it take to transmit the wifi header (at 1Mb/s and at 11Mb/s)? That's also airtime that's not availalbe to transmit user data. And then compare that to the time it takes to transmit a 1500 byte ethernet packet worth of data over a 160MHz wide channel Going back to SM'

Re: [Bloat] [Cake] [Rpm] [Make-wifi-fast] The most wonderful video ever about bufferbloat

2022-10-19 Thread David P. Reed via Bloat
4 microseconds! On Wednesday, October 19, 2022 3:23pm, "David Lang via Cake" said: > you have to listen and hear nothing for some timeframe before you transmit, > that > listening time is define in the standard. (isn't it??) > > David Lang > > On Wed, 19 Oct 2022, Bob McMahon wrote: > >

Re: [Bloat] [Cake] [Rpm] [Make-wifi-fast] The most wonderful video ever about bufferbloat

2022-10-12 Thread David P. Reed via Bloat
Bob -   I think it is great that Cisco has been looking at controlling buffer size in datacenters. However, I'm actually quite skeptical of the analysis here.   I think what is going on is that operating system scheduling delays (typical Linux scheduling of ACK packet generation for the TCP stack i