Messages in this thread | | | From | Con Kolivas <> | Subject | Re: [SCHED] wrong priority calc - SIMPLE test case | Date | Tue, 10 Jan 2006 03:08:04 +1100 |
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On Tuesday 10 January 2006 02:52, Mike Galbraith wrote: > At 12:11 PM 1/9/2006 +0100, Mike Galbraith wrote: > >Care to try an experiment?... > > Oops. I guess I should send one that's not mixed p1 and p0. Sorry about > that :-/ > > Anyway, if anyone wants to see a functional demonstration, just try > this. Remove the TASK_NONINTERACTIVE in fs/pipe.c in both the stock kernel > and this modified one so Davide Libenzi's excellent sleep pattern exploit > (irman2) can work [1], and do the below all at the same time ... > > make -j4 bzImage > irman2 > thud 3 > > With the stock kernel, I got bored after a half an hour, and stopped the > kernel build. It had produced 40 .o files. The modified kernel finished > in 20 minutes vs the 8 minutes it took to produce the same 504 .o files if > not under load. > > -Mike > > 1. it just so happens that Davide wrote irman2 using pipes... he could > have done something else. if anyone doesn't think this is a fair test, > just use Paolo's much simpler exploit instead. the result will be about > the same.
Want to try with a few other schedulers using plugsched?
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