Re: performance degradation on -ac tree

[Alan Cox]

> I have noticed that with e.g. the 2.4.0-test kernels, and e.g.
> 2.4.2, netperf to localhost gets between 350-400 MB/s.
> With recent -ac kernels, e.g. 2.4.3-ac5, netperf to localhost
> gets more like 250 MB/sec.

Thats one to ask Dave Miller.

> The same activity with recent -ac kernels feels like running
> through molasses, very sluggish, and it is I who am repeatedly
> outmaneuvered and embarrassed. It's quite awful.

The 2.4.3ac VM is far from ideal at the moment. Its a lot smoother for server
use and it doesnt spend so much time randomly killing wrong things but it does
stall too much