Messages in this thread |  | | Date | Thu, 14 Sep 2000 01:30:26 -0300 (BRST) | From | Rik van Riel <> | Subject | [PATCH *] VM patch for 2.4.0-test8 |
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Hi,
The new VM patch seems has received a major amount of code cleanup, performance tuning and stability improvement over the last few days and is now almost production quality, with the following 4 items left for 2.4:
- improve streaming IO performance - out of memory handling - integrate Ben LaHaise's readahead on the VMA level (and make drop_behind() work for that) .. fixes kswapd cpu eating - (maybe) make drop_behind() work better for some cases - testing, testing, testing, testing ...
The post-2.4 TODO list contains these items: - physical page based aging (reduce kswapd cpu use more and do better/more fair page aging) - much much better IO clustering (neatly abstracted away?) - page->mapping->flush() callback for journaling and network filesystems (maybe later in 2.4) - thrashing control (like process suspension?)
The new VM already seems to be more stable under load than the old VM and tuning has taken it so far that I'm already running into bottle necks in /other/ places (eg. the elevator code) when putting the system under rediculously heavy load...
I haven't had much time to do things like dbench and tiobench testing though, which is why I'm sending this email and asking the enthousiast benchmarkers to give the patch a try and tell me about the results.
Oh, and please don't restrict yourself to just the synthetic benchmarks. The VM is there to give the best results for applications that have something like a working set and has not been tuned yet to give good performance for benchmarks (which seem to run very much different from any application I've ever seen).
regards,
Rik -- "What you're running that piece of shit Gnome?!?!" -- Miguel de Icaza, UKUUG 2000
http://www.conectiva.com/ http://www.surriel.com/
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