High CPU usage for long periods of time
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Has anyone had any problems with running a job for more than an hour that pushes most of the CPU cores to 100% usage? I'm planning on making some animation, and with each frame taking about 5-7 minutes each, a single second of animation is going to come in around 2 hours 20 minutes or worse. For a 10 to 20 second clip that could easily cause the CPU to run at 100% for almost 12 hours or more. I've never had anything run that long on any system I've owned and I'm not sure if it's going to overheat the box, or if it's hard on the CPU to run that long. Anyone have any experience with this on a desktop system (for the record it's an 8 core MacPro)?
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I've been running Folding/SETI/MilkyWay@Home for years straight now. 100% all the time
// Steve McLenithan
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You shouldn't have any problem with a properly configured system. You know, there was a time when all CPUs ran 100% all the time. Until desktop systems started changing cpu speeds based on load, the wasn't any difference between application code and running in the idle loop.
I can imagine the sinking feeling one would have after ordering my book, only to find a laughably ridiculous theory with demented logic once the book arrives - Mark McCutcheon
Oh noes! I see a partial untruth. On new CPU's (well "new" is relative.. all CPU's with ACPI - so basically all) merely executing a HLT instruction (as is done by the "System Idle Process") can make it go into a lower (C1) power state (usually configurable in the BIOS settings) So even on Win2k (which does not use P states) or when you disable SpeedStep/Cool'n'Quiet the CPU load affects heat output.
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Like others said, unless your machine is poorly built, that is well within design specs. If you are paranoid, just download some temperature monitoring software (e.g. "motherboard monitor") and see if it goes too high. Besides temperature though, high load is more likely to reveal other problems like RAM timing/motherboard stability issues. -- Modified Monday, April 19, 2010 3:33 PM
dighn wrote:
and see if it goes too high.
And for Intel processors too high is over 100C. At 100C the processor should begin to throttle down the core speed so even that should not be too dangerous.
John
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Oh noes! I see a partial untruth. On new CPU's (well "new" is relative.. all CPU's with ACPI - so basically all) merely executing a HLT instruction (as is done by the "System Idle Process") can make it go into a lower (C1) power state (usually configurable in the BIOS settings) So even on Win2k (which does not use P states) or when you disable SpeedStep/Cool'n'Quiet the CPU load affects heat output.
I don't remember that on my 386 :)
I can imagine the sinking feeling one would have after ordering my book, only to find a laughably ridiculous theory with demented logic once the book arrives - Mark McCutcheon
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I don't remember that on my 386 :)
I can imagine the sinking feeling one would have after ordering my book, only to find a laughably ridiculous theory with demented logic once the book arrives - Mark McCutcheon
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I think that was his original point :)
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I think that was his original point :)
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Has anyone had any problems with running a job for more than an hour that pushes most of the CPU cores to 100% usage? I'm planning on making some animation, and with each frame taking about 5-7 minutes each, a single second of animation is going to come in around 2 hours 20 minutes or worse. For a 10 to 20 second clip that could easily cause the CPU to run at 100% for almost 12 hours or more. I've never had anything run that long on any system I've owned and I'm not sure if it's going to overheat the box, or if it's hard on the CPU to run that long. Anyone have any experience with this on a desktop system (for the record it's an 8 core MacPro)?
¡El diablo está en mis pantalones! ¡Mire, mire! SELECT * FROM User WHERE Clue > 0 0 rows returned Save an Orange - Use the VCF! Personal 3D projects Just Say No to Web 2 Point Blow
You should definitely take a test run monitoring CPU, disk and case temperature. Desktop systems often don't have enough airflow. Nothing that can't be fixed with another fan or two. Oh, and make sure the room the box stands in is big enough to cope with it. I'm running Folding at Home permanently on 3 of 4*2(HT) cores.
Agh! Reality! My Archnemesis![^]
| FoldWithUs! | sighist | µLaunch - program launcher for server core and hyper-v server. -
Has anyone had any problems with running a job for more than an hour that pushes most of the CPU cores to 100% usage? I'm planning on making some animation, and with each frame taking about 5-7 minutes each, a single second of animation is going to come in around 2 hours 20 minutes or worse. For a 10 to 20 second clip that could easily cause the CPU to run at 100% for almost 12 hours or more. I've never had anything run that long on any system I've owned and I'm not sure if it's going to overheat the box, or if it's hard on the CPU to run that long. Anyone have any experience with this on a desktop system (for the record it's an 8 core MacPro)?
¡El diablo está en mis pantalones! ¡Mire, mire! SELECT * FROM User WHERE Clue > 0 0 rows returned Save an Orange - Use the VCF! Personal 3D projects Just Say No to Web 2 Point Blow
I used to work a 3d animation studio. We didn't have a proper render farm, so many o' times during the night we'd have all the machines at work render scenes for commercials. I never had any problems with the machines overheating. Just so as long as they are properly cooled to begin with. I mean I'm sure if you did this for like 5 months in a row you'd hit a snag, but I doubt it would be too much to overcome. That being said, a 100+ machine render farm would totally rock. Too bad I haven't won the lottery yet.
Jeremy Falcon
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Has anyone had any problems with running a job for more than an hour that pushes most of the CPU cores to 100% usage? I'm planning on making some animation, and with each frame taking about 5-7 minutes each, a single second of animation is going to come in around 2 hours 20 minutes or worse. For a 10 to 20 second clip that could easily cause the CPU to run at 100% for almost 12 hours or more. I've never had anything run that long on any system I've owned and I'm not sure if it's going to overheat the box, or if it's hard on the CPU to run that long. Anyone have any experience with this on a desktop system (for the record it's an 8 core MacPro)?
¡El diablo está en mis pantalones! ¡Mire, mire! SELECT * FROM User WHERE Clue > 0 0 rows returned Save an Orange - Use the VCF! Personal 3D projects Just Say No to Web 2 Point Blow
And do we get to see the animation when it's done? :-\
Jeremy Falcon
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And do we get to see the animation when it's done? :-\
Jeremy Falcon
Hell yeah! You think I'm going to go to all this trouble just to store a video on my HD? Puhhlease!!!!
¡El diablo está en mis pantalones! ¡Mire, mire! SELECT * FROM User WHERE Clue > 0 0 rows returned Save an Orange - Use the VCF! Personal 3D projects Just Say No to Web 2 Point Blow
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Has anyone had any problems with running a job for more than an hour that pushes most of the CPU cores to 100% usage? I'm planning on making some animation, and with each frame taking about 5-7 minutes each, a single second of animation is going to come in around 2 hours 20 minutes or worse. For a 10 to 20 second clip that could easily cause the CPU to run at 100% for almost 12 hours or more. I've never had anything run that long on any system I've owned and I'm not sure if it's going to overheat the box, or if it's hard on the CPU to run that long. Anyone have any experience with this on a desktop system (for the record it's an 8 core MacPro)?
¡El diablo está en mis pantalones! ¡Mire, mire! SELECT * FROM User WHERE Clue > 0 0 rows returned Save an Orange - Use the VCF! Personal 3D projects Just Say No to Web 2 Point Blow
Develop Jim@Home and I'll gladly lend my spare cycles to your animation processing.
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Has anyone had any problems with running a job for more than an hour that pushes most of the CPU cores to 100% usage? I'm planning on making some animation, and with each frame taking about 5-7 minutes each, a single second of animation is going to come in around 2 hours 20 minutes or worse. For a 10 to 20 second clip that could easily cause the CPU to run at 100% for almost 12 hours or more. I've never had anything run that long on any system I've owned and I'm not sure if it's going to overheat the box, or if it's hard on the CPU to run that long. Anyone have any experience with this on a desktop system (for the record it's an 8 core MacPro)?
¡El diablo está en mis pantalones! ¡Mire, mire! SELECT * FROM User WHERE Clue > 0 0 rows returned Save an Orange - Use the VCF! Personal 3D projects Just Say No to Web 2 Point Blow
Jim Crafton wrote:
Has anyone had any problems with running a job for more than an hour that pushes most of the CPU cores to 100% usage?
Nope, but then again I have water-cooling[^] :cool: I think the 8core macs are the same as the i7 900 series, so your CPU can handle temps up to 99 deg C (not that you want it that high, just saying). Running continuously, I would not feel happy if it was over 80 deg.
xacc.ide
IronScheme - 1.0 RC 1 - out now!
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Jim Crafton wrote:
Has anyone had any problems with running a job for more than an hour that pushes most of the CPU cores to 100% usage?
Nope, but then again I have water-cooling[^] :cool: I think the 8core macs are the same as the i7 900 series, so your CPU can handle temps up to 99 deg C (not that you want it that high, just saying). Running continuously, I would not feel happy if it was over 80 deg.
xacc.ide
IronScheme - 1.0 RC 1 - out now!
((λ (x) `(,x ',x)) '(λ (x) `(,x ',x))) The Scheme Programming Language – Fourth Editionleppie wrote:
Nope, but then again I have water-cooling
Pft, that's nothing compared to submerged oil cooling. :rolleyes:
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leppie wrote:
Nope, but then again I have water-cooling
Pft, that's nothing compared to submerged oil cooling. :rolleyes:
I have seen that before, but it sure seems like a lot of hassle (and a lot of other little issues).
xacc.ide
IronScheme - 1.0 RC 1 - out now!
((λ (x) `(,x ',x)) '(λ (x) `(,x ',x))) The Scheme Programming Language – Fourth Edition -
I have seen that before, but it sure seems like a lot of hassle (and a lot of other little issues).
xacc.ide
IronScheme - 1.0 RC 1 - out now!
((λ (x) `(,x ',x)) '(λ (x) `(,x ',x))) The Scheme Programming Language – Fourth EditionYeah, and the cooling is not even that great unless you pump the oil through a tube and cool that. But it's still neat. :)
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Develop Jim@Home and I'll gladly lend my spare cycles to your animation processing.
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Yeah, and the cooling is not even that great unless you pump the oil through a tube and cool that. But it's still neat. :)
I had a rig like that up and running for about 6 months before the power went out (in the house) one night...it never worked again and I've never spent the time to fix it... just drained it, put the mineral oil back in the jugs and it is now boxed up in the closet. http://www.kinar.net/computer/[^] The heat stayed pretty constant in the tank even when the machine was under load.
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Has anyone had any problems with running a job for more than an hour that pushes most of the CPU cores to 100% usage? I'm planning on making some animation, and with each frame taking about 5-7 minutes each, a single second of animation is going to come in around 2 hours 20 minutes or worse. For a 10 to 20 second clip that could easily cause the CPU to run at 100% for almost 12 hours or more. I've never had anything run that long on any system I've owned and I'm not sure if it's going to overheat the box, or if it's hard on the CPU to run that long. Anyone have any experience with this on a desktop system (for the record it's an 8 core MacPro)?
¡El diablo está en mis pantalones! ¡Mire, mire! SELECT * FROM User WHERE Clue > 0 0 rows returned Save an Orange - Use the VCF! Personal 3D projects Just Say No to Web 2 Point Blow
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Has anyone had any problems with running a job for more than an hour that pushes most of the CPU cores to 100% usage? I'm planning on making some animation, and with each frame taking about 5-7 minutes each, a single second of animation is going to come in around 2 hours 20 minutes or worse. For a 10 to 20 second clip that could easily cause the CPU to run at 100% for almost 12 hours or more. I've never had anything run that long on any system I've owned and I'm not sure if it's going to overheat the box, or if it's hard on the CPU to run that long. Anyone have any experience with this on a desktop system (for the record it's an 8 core MacPro)?
¡El diablo está en mis pantalones! ¡Mire, mire! SELECT * FROM User WHERE Clue > 0 0 rows returned Save an Orange - Use the VCF! Personal 3D projects Just Say No to Web 2 Point Blow
Whether its going to be OK or not depends on the system and the ambient environment. Laptops are typically the worst, but not all, and there's some poorly designed and cooled desktops out there too. Given multicore chips are still fairly new and mostly underutilized, I wouldn't just assume the system cooling was sufficient for extended runs of such a CPU intensive application, not even on a Mac. About all you can do is to set up a temperature monitor to warn you if it gets too hot and hope the sensors are in the needed places. Some CPUs have internal temp sensors built in and will protect themselves from overheating, I don't know if that's Mac's CPU has that feature.
patbob
