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Missing the AF_BUSMissing the AF_BUSPosted Jul 9, 2012 9:11 UTC (Mon) by gioele (subscriber, #61675)In reply to: Missing the AF_BUS by daniel Parent article: Missing the AF_BUS
> I straightened it all out and cut the CPU overhead in half, consequently reducing the hop latency by that amount. I went on to analyze the rest of the stack to some extent and found it was all like that. You can too, all you need to do is go look at the code.
> This is part of a call chain that goes about 20 levels deep. There is much worse in there. See, that stuff looks plausible and if you listen to the folklore it sounds fast. But it actually isn't, which I know beyond a shadow of a doubt.
Don't you have some notes, implementation ideas or performance tests that you want to share with the rest of the kernel community? I'm pretty sure that they would love to hear how to cut in half the CPU overhead of UDP messages without regressions in functionalities.
This kind of impact would surely reduce the battery consumption of mobile applications, so, maybe the main developers will not interested, but devs of mobile-oriented forks like Android will surely be.
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