Carl Lowenstein wrote: > On Fri, May 2, 2008 at 6:04 PM, Paul Norton <[EMAIL PROTECTED]> wrote: >> David Brown wrote: >> >>> On Fri, May 02, 2008 at 08:52:13AM -0700, Urivan Saaib wrote: >>> >>> >>>> Don't know how many people does this but I turn off both sets of >>>> entertainment systems every night (disconnect the power strip). I >> haven't >>>> see any major fluctuation on my SDGE bill since Dec when I contracted >> the >>>> U-Verse service. >>>> >>> Something like the "Watts Up" or equivalent is real handy for this. This >>> is how I concluded that running Folding at Home continuously on the PS3 >>> would cost me about $25 a month. >> Ouch! So, it's running 100% cpu most or all of the time? > > Well, yes. Folding at Home is a CPU-intensive program, with very > minimal I/O. It receives a task from the central system, and crunches > on it until it has a result, then communicates back. I would guess > that the I/O is on the order of a few kilobytes per month.
Maybe more than a few kB/mo, but that's the general idea. I've been running BOINC for a while know on a laptop with the estimate that 100 watts continuous would represent a donation of $10/mo to a good cause. I'm not sure of my numbers, but I did enter into that operation knowingly. Something interesting: I discovered a setting in recent kernels (only), /sys/devices/system/cpu/cpu0/cpufreq/ondemand/ignore_nice_load which is normally 1, and which results in throttling down the cpu frequency because these progs run with nice=19. Resetting ignore_nice_load to 0 keeps it at full tilt -- and tests the cpu cooling system in the process. :-) Regards, ..jim -- [email protected] http://www.kernel-panic.org/cgi-bin/mailman/listinfo/kplug-list
