On Thu, Dec 15, 2011 at 02:20:04PM -0000, Steven Hartland wrote: > With all the discussion I thought I'd give a buildworld > benchmark a go here on a spare 24 core machine. ULE > tested fine but with 4BSD it wont even boot panicing > with the following:- > http://screensnapr.com/v/hwysGV.png > > This is on a clean 8.2-RELEASE-p4 > > Upgrading to RELENG_9 fixed this but its a bit concerning > that just changing the scheduler would cause the machine > to panic on boot. > > Its only a single run so varience could be high but here's > the result of a buildworld on this machine running the > two different schedulers:- > 4BSD: 24m54.10s real 2h43m12.42s user 56m20.07s sys > ULE: 23m54.68s real 2h34m59.04s user 50m59.91s sys > > What really sticks out is that this is over double that > of an 8.2 buildworld on the same machine with the same > kernel > ULE: 11m12.76s real 1h27m59.39s user 28m59.57s sys
9.0 ships with gcc and clang which both need to be compiled, 8.2 only has gcc. > > This was run 9.0-PRERELEASE kernel due to 4BSD panicing > on boot under 8.2. > > So for this use ULE vs 4BSD is neither here-nor-there > but 9.0 buildworld is very slow (x2 slower) compared > with 8.2 so whats a bigger question in my mind. > > Regards > Steve
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