On Fri, Oct 28, 2005 at 09:32:15PM +1000, Benjamin Herrenschmidt wrote: > > > Actually, if you don't want to take the perfs. hit caused by > > > CONFIG_HIGHMEM, you can also play around with TASK_SIZE and KERNELBASE > > > values in the .config :) But if you don't know what it's all about, then > > > don't even try ! Besides, it will break yaboot. > > > > Benh, do you know how much the performance hit is ? > > Nope. Never actually measured :)
Ben and Sven, I did not make any precise and measurements, but I am running numerically intensive algorithms (MCMC and approximate dynamic programming, they use quite a bit of memory too) which I time. I compared the log files with the ones before HIGHMEM kernels, and I see no change in performance that is outside the range of measurement error. Tamas -- Bayesian statistics is difficult in the sense that thinking is difficult. --Donald A. Berry, American Statistician 51:242 (1997) -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
