On Wed, May 17, 2006 at 01:22:59PM +0300, Dmitry Pryanishnikov wrote: > > Hello! > > On Tue, 16 May 2006, Colin Percival wrote: > >Personally, since FreeBSD 4.11 will reach its EoL about 8 months > >from now, and the 4.x->[56].x upgrade path is non-trivial, I > >recommend installing FreeBSD 6.1 instead. > > Well, have you seen my simple performance benchmarking RELENG_4 vs 6? > IMHO it mimics quote common usage pattern: it just downloads a large file > with 10Mbps rate and stores it on UFS filesystem. On the same hardware > (i386 uniprocessor Celeron-333 system with 128Mb RAM and fast SAMSUNG > SP0802N > HDD using UDMA33) under the same conditions, using more optimal config > (INVARIANTS removed) RELENG_6 (and 5) _still_ uses >= 50% of CPU time > for (Intr+Sys), while RELENG_4 doesn't use more than 28% for them. So > (unless this performance difference will be minimized) I predict _a lot_ > of requests to extend RELENG_4 support further, because people just couldn't > afford 4->6 upgrade due to a loss of performance.
This is a network+filesystem benchmark, and it's probably the "network" part that is using extra CPU, not the "filesystem" part. But until you run those profiling tests we can't be sure. Kris
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