On Sun, Apr 24, 2005 at 08:59:25PM -0700, Julian Elischer wrote: > Kris Kennaway wrote: > > >Measuring disk device performance (i.e. running a benchmark against > >the bare device) and filesystem performance (writing to a filesystem > >on the device) are very different things. > > I wish people would stop trying to deny that we have serious work in front > of us to get the VFS and disk IO figures back to where they were before. > > there ARE slowdowns and I have seen it both with tests on teh basic > hardware and throug the filesystems. I don't know why this surproses > people because we have still a lot of work to do in teh interrupt latency > field for example, and I doubt that even PHK would say that there is no > work left to do in geom. > Where we are now is closing in on "feature complete". Now we need to > profile and optimise. OK, but note that I didn't deny anything, I only questioned whether the OP was observing a real problem (he didn't mention disk I/O, or in fact any specific claim) or whether it was a coloured perception based on the (incorrect) assumption that gcc compilation speed was measuring a performance loss in FreeBSD. Kris
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