On Sep 10, 2009, at 1:51 AM, ah...clem wrote:
> > On Sep 9, 2:34 pm, Len Gerstel <lgers...@gmail.com> wrote: > >> 1) The apps are not dual processor aware. Most apps are. Even VLC >> player is and will split the load across the 2 processors of a dual. >> >> 2) You are not doing anything with these systems while the apps are >> running. Since they do not appear to be dual processor aware, they >> are running at about 100% utilization on one processor, and the other >> is sitting near 0% I bet. > > actually, you lose. where do i go to collect? ;o) i wouldn't > presume to guess whether the apps are dual processor aware or if the > OS distributes the work, but if i view the activity monitor on the DP > machine while a single job is running, first one processor is 75% > maxed out while the other is near 25% activity, then it flip-flops and > the other is 75% maxed out while the first is near 25% activity. the > frequency of the flip-flops is about twice per second. if i run two > jobs simultaneously, both processors stay 100% maxed out > continuously. and as you might expect, on the SP machine, the > activity monitor shows the one CPU 100% maxed out continuously. That implies that the app is not fully dual processor aware. If it was, you would see both processors near max. I think the 25% is system overhead and the 75% is the app. Pull up activity monitor and see what the CPU percentage is for each running process. > differences in viewing video, as you describe, is (this time i'll > wager) more a function of the video card processor speed and memory, > not the main CPU processor speed. it really surprises me how often > folks need reminded that a chain is only as strong (fast) as it > weakest (slowest) link. why are CPUs are like quarterbacks . . . ? > they either get all the credit or all the blame, and usually deserve > neither. I did not change my video card (a hacked 9600) or ram when I went from the 933 to a dual 1.2, but I did see a huge video playback performance boost with the dual. Len --~--~---------~--~----~------------~-------~--~----~ You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list -~----------~----~----~----~------~----~------~--~---
