On 7/17/07, Attilio Rao <attilio_at_freebsd.org> wrote: > 2007/7/17, Abdullah Ibn Hamad Al-Marri <almarrie_at_gmail.com>: > > On 7/17/07, Jeff Roberson <jroberson_at_chesapeake.net> wrote: > > > With regards to buildkernel times; I do not want to sacrafice performance > > > on other benchmarks to improve buildkernel. The problem is that 4BSD is > > > as agressive as possible at scheduling work on idle cores. This behavior > > > that helps one buildworld hurts on other, in my opinion, more important > > > benchmarks. > > > > > > For example: http://people.freebsd.org/~jeff/sysbench.png > > > > > > ULE is 33% faster than SCHED_4BSD at this mysql test. This is a direct > > > result of prefering to idle to make more efficient scheduling decisions. > > > ULE is also faster at various networking benchmarks for similar reasons. > > > > > > I also believe that while the real time may be slower on buildworld the > > > system and user time will be smaller by a degree greater than the delta in > > > real time. This means that while you're building packages you have a > > > little more cpu time leftover to handle other tasks. Furthermore, as the > > > number of cores goes up things start to tip in favor of ULE although this > > > is somewhat because it's harder for even 4BSD to keep them busy due to > > > disk bandwidth. > > > > > > Thanks everyone for testing. Can someone confirm that they have tested > > > with x86 rather than amd64? I will probably commit later today. > > > > > > Thanks, > > > Jeff > > > > Did you compare it to latest Linux fixes? is FreeBSD + ULE + MySQL > > still faster than linux? > > Just look at the link Jeff posted, it seems very well explaining :). > > Attilio heh I love it! When I checked last time, Linux took it over, I'm glad to see FreeBSD is the leader now again! -- Regards, -Abdullah Ibn Hamad Al-Marri Arab Portal http://www.WeArab.Net/Received on Tue Jul 17 2007 - 17:04:41 UTC
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