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- From: Rocky Rhodes <rhodes@sgi.com>
- To: "'Steven G. Parker'" <sparker@cs.utah.edu>
- Cc: "'Abe Stephens'" <abe@sci.utah.edu>, "'Hansong Zhang'" <hansong@sgi.com>, manta@sci.utah.edu
- Subject: [MANTA] RE: Compiler flags and performance on altix?
- Date: Thu, 12 May 2005 17:38:48 -0700
The reason the -imagedisplay null flag wasn't working was that the ia64
AtomicCounter implementation in SCIRun/Core/Threads/Thread_pthreads.cc
was broken. Seems like a bunch of stuff wouldn't have worked...
I checked in a fix and the "-imagedisplay null" thing now works. Wonder if
anything else is now broken, though...
Rocky
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-----Original Message-----
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From: Steven G. Parker [mailto:sparker@cs.utah.edu]
>
Sent: Thursday, May 12, 2005 4:05 PM
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To: Rocky Rhodes
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Cc: 'Abe Stephens'; 'Hansong Zhang'
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Subject: Re: Compiler flags and performance on altix?
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>
I actually get 4.5 frames per second on the G5, and 8.3 fps for two
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processors. The altix gets only .77 fps for 1p.
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I did:
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bin/manta -np 1 -imagedisplay null -bench
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The default bench is equivalent to -bench 100 10. Also, for some
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reason the altix won't parse the -imagedisplay null flag correctly...
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>
Steve
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On May 12, 2005, at 4:40 PM, Rocky Rhodes wrote:
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> This is running "bin/manta -bench 10 10"? By "3.5" do you mean 3.5
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> seconds
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> for 10 frames on the g5?
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>
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> We'll think about some compiler flags...
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>> -----Original Message-----
>
>> From: Abe Stephens [mailto:abe@sci.utah.edu]
>
>> Sent: Thursday, May 12, 2005 3:28 PM
>
>> To: Rocky Rhodes; 'Hansong Zhang'
>
>> Cc: Steven Parker
>
>> Subject: Compiler flags and performance on altix?
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>>
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>>
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>> Hi-
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>> What compilers and compiler option flags have you tried? I have
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>> used the
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>> intel compiler, with pretty much just -O3. I think we are looking
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>> for
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>> some good ones to hard code into the default cmake build on the
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>> different platforms.
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>>
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>> 1 Processor -- Benchmark completed in 12.9411 seconds (10 frames,
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>> 0.772732 frames per second)
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>>
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>> Steve reports 3.5 on one processor of his g5.
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>>
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>> 2 Processors -- Benchmark completed in 6.59063 seconds (10 frames,
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>> 1.51731 frames per second)
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>> 4 Processors -- Benchmark completed in 3.38019 seconds (10 frames,
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>> 2.95841 frames per second)
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>> 8 Processors -- Benchmark completed in 1.70183 seconds (10 frames,
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>> 5.87604 frames per second)
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>> 16 Processors -- Benchmark completed in 0.892033 seconds (10 frames,
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>> 11.2103 frames per second)
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>>
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>>
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>> Abe
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- [MANTA] RE: Compiler flags and performance on altix?, Rocky Rhodes, 05/12/2005
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