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12/18/2010 03:47:38 PM · #1 |
I just replaced a 2.3 quad core with a 3.4 quad core and the system overall is faster. I benchmarked old CPU at 37 seconds with Retouch Artists Speedtest at 37 seconds. With new CPU it's running at about 23 seconds - exactly as expected. Topaz filters are much more usable now with increased speed.
However, I accidentally saved larger test image and started action again. It went at decent speed for resize, but then when it was changing colorspace is slowed way down. I was monitoring CPU utilization and everything dropped down to about 10-15%. During these steps with original file it was running at 50-80% per core. Any thoughts on why the slowdown? I want CS4 to use as much of the CPU as possible.
Now it may be a good thing in the short run because my motherboard will only accept a 3 pin fan connect for the CPU and I had to install the old one. Running all 4 cores at 100% with case open ramped temp up to 61C before I stopped the test. New fan will be ordered ASAP to avoid meltdown. |
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12/18/2010 03:53:02 PM · #2 |
My guess is that you started paging to disk, and now the disk I/O is creating a bottleneck. The processor utilization drops because it has to wait for data to be swapped.
Are you running a 32-bit OS, or 64? How much RAM is installed? |
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12/18/2010 03:54:04 PM · #3 |
Originally posted by kirbic:
My guess is that you started paging to disk, and now the disk I/O is creating a bottleneck. The processor utilization drops because it has to wait for data to be swapped.
Are you running a 32-bit OS, or 64? How much RAM is installed? |
Vista 64 bit, 8 gig of RAM.
Edit: currently using about 4gig.
Message edited by author 2010-12-18 15:54:35. |
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12/18/2010 04:00:22 PM · #4 |
Ah. Well, with a 64-bit OS and 8GB of RAM, disk paging is less likely, but you still may be running up against an application-specific memory limit. You can check if it's a disk paging issue by watching the HDD activity indicator light; when the system slows down, if the HDD light activity goes way up, then you've got your culprit. If it does not, look at the application memory limits and try to increase them.
ETA: In CS4 this is under Edit>Preferences>Performance
Message edited by author 2010-12-18 16:02:11. |
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12/18/2010 04:11:43 PM · #5 |
I have CS4 maxed out under performance. I ran the action again and watched disc load, it stayed low until end of the action and hit almost 100%, and stayed quite high for a while when the action completed.
Task manager says my page file is 5080M/16560M. Does this sound about right?
Edit: AHA!! Ran action on image a second time. CS4 is using 3392M and HD is at 100%. I believe that's the brick wall for the 32 bit version. I think it's time to switch to the 64 bit version and see what happens. Unfortunately some of my favorite filters aren't ready for 64 bit.
Edit 2: Tried it with 64 bit version and at end of action hit 100% on disk load. Even after shutting down CS4 disk load is staying around 100%, but AnVir doesn't show any particular process doing it. All were very low until I started Firefox, but that's only using 9K/s.
Message edited by author 2010-12-18 16:30:50. |
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