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World Community Grid Forums
Category: Completed Research
Forum: Help Conquer Cancer
Thread: Discrimination in Work Units based on Operating System of Client |
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Thread Status: Active Total posts in this thread: 14
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RT
Master Cruncher USA - Texas - DFW Joined: Dec 22, 2004 Post Count: 2636 Status: Offline Project Badges: 
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RT, There was a reason why HCC was chosen as the prime target for GPUfication even before the scientists optimized the application and removed the external loops to make it run 2x faster on Windows and 4x faster from the old Linux version to the new Linux version. Another something I did not know...that HCC was chosen as the prime target for GPUfication. I wonder...is this expected any time in the forseeable future...the GPUfication I mean? |
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TJPope
Cruncher Joined: Oct 14, 2010 Post Count: 1 Status: Offline |
Just to chime in with run times on Win7 64 vs Ubuntu 64.
----------------------------------------HCC is a lot faster, but HPF and HFCC both ran a not insignificant bit faster. I have no idea on integer usage of the various programs but I do know that under Linux there is less OS overhead running which lets the crunching programs run with a few more % of CPU than on windows. That's what me watching the task managers of the 2 has told me at least, lol.  |
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Hypernova
Master Cruncher Audaces Fortuna Juvat ! Vaud - Switzerland Joined: Dec 16, 2008 Post Count: 1908 Status: Offline Project Badges: 
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The runtime differences you are seeing is correct and that is due to compiler differences between the two operating systems. Thanks uplinger for this clear answer. Compiler difference makes sense. Code produced is more performant or efficient under Linux than under Windows. It gives a picture of Windows as Fat and Slow, against Linux Lean and Fast.  |
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bicotz
Advanced Cruncher Canada Joined: Apr 25, 2010 Post Count: 67 Status: Offline Project Badges:
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Here's my experience on the performance diffs between systems: ONLY LINUX 64-bit is twice as fast on HCC; Linux 32-bit, win 32 and 64 are just about the same speed. OSes running under VMware are very slightly slower.
----------------------------------------My most bizarre rig is as follows: WinXP 32-bit hosting a Linux Ubuntu AMD64 (64-bit) guest ! Many told me I was asking for trouble hosting a 64-bit os on a 32-bit one. As we speak, it's running at full speed, crunching at more than twice the win32 speed... Celeron e3300 @3.65Ghz, 2Gb mem: 3500 fp, 19250 Integer. 45minutes/units vs 95min on win32  The CPU is indeed working harder. Temperature has risen from 52 to 55c once I ran Boinc from the win32 to the hosted Linux64...  [Edit 1 times, last edit by bicotz at Oct 31, 2010 3:09:47 AM] |
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