Odd Dual-core CPU Usage in Celestia.
Posted: 30.10.2006, 04:27
I've read on these forums that Celestia is not multi-thread enabled. Because of this, a user with dual-core processors should have at most around 50% usage. And when you minimize Celestia, it's CPU usage should drop to 0. I've had a different experience. Here are some situations:
1. Zoomed in near Earth or any planet, CPU usage at 100%, Task Manager shows 100% usage in both cores.
2. Still zoomed in near Earth, but Celestia minimized. Task Manager shows 50% usage, with one core havving 0 usage and the other using 100% of the core.
3. When I zoom way out so that nothing is on the screen anymore, CPU usage drops back down to near 0 for both cores, both when Celestia is minimized and when it's maximized.
What's wierd is that it only happens sometimes, so it's been kinda hard to reproduce. Sometimes it works as expected (50% CPU usage maximized, 0% usage when minimized) and sometimes it doesn't. I can't really seem to find a pattern. Plus, this time when testing it, I minimized it when it was using 100% of both cores (as in situation #1 above) and now it's using approx 50% of each core, unlike situation #2 above. I've had V-Sync enabled the entire time and my framerate has never gone above 60 fps. I'm not sure if I can expect any real help from posting this, but maybe someone has noticed any similiar oddities.
1. Zoomed in near Earth or any planet, CPU usage at 100%, Task Manager shows 100% usage in both cores.
2. Still zoomed in near Earth, but Celestia minimized. Task Manager shows 50% usage, with one core havving 0 usage and the other using 100% of the core.
3. When I zoom way out so that nothing is on the screen anymore, CPU usage drops back down to near 0 for both cores, both when Celestia is minimized and when it's maximized.
What's wierd is that it only happens sometimes, so it's been kinda hard to reproduce. Sometimes it works as expected (50% CPU usage maximized, 0% usage when minimized) and sometimes it doesn't. I can't really seem to find a pattern. Plus, this time when testing it, I minimized it when it was using 100% of both cores (as in situation #1 above) and now it's using approx 50% of each core, unlike situation #2 above. I've had V-Sync enabled the entire time and my framerate has never gone above 60 fps. I'm not sure if I can expect any real help from posting this, but maybe someone has noticed any similiar oddities.