Whoa… and now I’m even more afraid :-) My sincere apologies to anyone whose code I may have mis-represented! I just tried to get it… sorry if there are silly mistakes in there!
> On 7 Feb 2024, at 13:05, Dave Taht <dave.t...@gmail.com> wrote: > > Dear Michael: > > Thank you for digging deeply into packet pacing, TSQ, etc. I think > there are some interesting new possibilities in probing (especially > during slow start) that could make the core idea even more effective > than it is. I also tend to think that attempting it in various cloudy > environments and virtualization schemes, and with certain drivers, the > side effects are not as well understood as I would like. For example, > AWS's nitro lacks BQL as does virtio-net. > > I think the netdev community, now cc'd, would be interested in your > document and explorations so far, below. I hope for more > enlightenment. > > On Wed, Feb 7, 2024 at 6:57 AM Michael Welzl via Bloat > <bloat@lists.bufferbloat.net> wrote: >> >> Dear de-bloaters of buffers, >> Esteemed experts of low delay and pacing! >> >> I have no longer been satisfied with high-level descriptions of how pacing >> works in Linux, and how it interacts with TSQ (I’ve seen some, in various >> papers, over the years) - but I wanted to REALLY understand it. So, I have >> dug through the code. >> >> I documented this experience here: >> https://docs.google.com/document/d/1-uXnPDcVBKmg5krkG5wYBgaA2yLSFK_kZa7xGDWc7XU/edit?usp=sharing >> but it has some holes and may have mistakes. >> >> Actually, my main problem is that I don’t really know what goes on when I >> configure a larger IW… things seem to get quite “off” there. Why? Anyone up >> for solving that riddle? ;-) >> (see the tests I documented towards the end of the document) >> >> Generally, if someone who has their hands on files such as tcp_output.c all >> the time could take a look, and perhaps “fill” my holes, or improve anything >> that might be wrong, that would be fantastic! I think that anyone should >> be allowed to comment and make suggestions in this doc. >> >> MANY thanks to whoever finds the time to take a look ! >> >> Cheers, >> Michael >> >> _______________________________________________ >> Bloat mailing list >> Bloat@lists.bufferbloat.net >> https://lists.bufferbloat.net/listinfo/bloat > > > > -- > 40 years of net history, a couple songs: > https://www.youtube.com/watch?v=D9RGX6QFm5E > Dave Täht CSO, LibreQos _______________________________________________ Bloat mailing list Bloat@lists.bufferbloat.net https://lists.bufferbloat.net/listinfo/bloat
