FWIW, Xorg and firefox feel _much more_ responsive with the fix I propose whenrunning with a make -j10. The system is even usable with a make -j20 on my UP machine, even though I can start feeling a some lag. This is probably a more important, yet less scientific, result.
I’ll test that myself (but in a bit – I need to go do voter registration and socsec update first, though – I became a US citizen last week).
Because yes, that’s the reason I’m personally interested in your scheduler latency work: I think our X behavior under load is pitiful(I do "make -j16" on my dual-core with HT Core i5, and web browsong shouldn’t start to lag as much as it does just because I overcommit the CPU a bit). So if this makes a noticeable difference, I think it’s very important.
Linus
只有经历过地狱般的折磨，才有征服天堂的力量。
