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World Community Grid Forums
Category: Retired Forums
Forum: Member-to-Member Support [Read Only]
Thread: 50% cpu usage instead of 100% |
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Thread Status: Active Total posts in this thread: 12
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Hynee
Cruncher Joined: Dec 31, 2004 Post Count: 4 Status: Offline Project Badges: 
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If I'm getting this right, if the WCG client did run two threads, the CPU would show 100%, but the tasks would take twice as to run at worst, maybe a little less if they were suited to the P4's hyperthreading. Correct?
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
That is right. Hyperthreading is just an attempt to eliminate the disadvantages of a long pipeline on the Pentium 4. Increasing the chip area by 5% allows a 50% speedup on some video editing programs that are ideally designed to benefit. Most programs benefit much less and a few are hurt. The new dual core CPUs will do much better when they are released.
On a hyperthreading Pentium 4, 50% means 1 thread is completely utilizing the CPU while 100% means 2 threads are sharing the CPU. So both 50% and 100% mean the CPU is running at top speed. Actual throughput is uncertain but is probably about 20% - 30% greater for 100%. |
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