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LWN.net Weekly Edition for May 23, 2013
An "enum" for Python 3
An unexpected perf feature
LWN.net Weekly Edition for May 16, 2013
A look at the PyPy 2.0 release
Nichols, Jacobson: Controlling Queue Delay
Posted May 9, 2012 21:54 UTC (Wed) by jg (subscriber, #17537)
With luck, the current patch will go upstream into the next Linux release; if not, the release after.
Posted May 10, 2012 0:00 UTC (Thu) by Fowl (subscriber, #65667)
Posted May 10, 2012 5:45 UTC (Thu) by mtaht (✭ supporter ✭, #11087)
In the interim, please play with the code...
Posted May 11, 2012 16:25 UTC (Fri) by jg (subscriber, #17537)
Eric Dumazet is working on a SFBCODEL (like the SFBRED he did); I don't know if that will make the next merge window. That would probably be what most people would want to use on their laptop.
However, note that the problems are more subtle in general. The 802.11 drivers will need a lot of work to be able to use CoDel. I don't know how long that will take, but my guess is months to have even a preliminary version to play with. So don't expect magic over night.
And remember, your home routers and broadband gear are also bloated; so expect you need to do something there. CeroWrt is attacking this problem head on right now, so if you want a home router, that is the direction to go right now. By bandwidth shaping, you can hide most of the bloated buffers in the broadband hop.
Posted May 11, 2012 20:26 UTC (Fri) by zlynx (subscriber, #2285)
For example, my Comcast cable is rated at 20 Mbit, but I often get more. A LOT more. Downloads from CDNs that have local servers can reach 45 Mbit in bursts. I don't have really reliable bandwidth tracking, so that number could be off, but 45 is what I've seen.
If I use standard traffic shaping I'm limiting my speeds to 20 Mbit when I might have the option of twice that speed.
Posted May 17, 2012 10:55 UTC (Thu) by njs (guest, #40338)
Posted May 17, 2012 12:47 UTC (Thu) by Cyberax (✭ supporter ✭, #52523)
Posted May 17, 2012 19:06 UTC (Thu) by zlynx (subscriber, #2285)
This makes your router the bottleneck. This also lets you do RED with ECN and other things. Doing a traffic police rate drop on the WAN port just isn't as good.
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