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Re: IDL time test with a PowerMac G4 [message #17349 is a reply to message #17330]

Thu, 07 October 1999 00:00

Pavel Romashkin
Messages: 166
Registered: April 1999

Senior Member

>> 4.73333=Total Time, 0.096772401=Geometric mean, 23 tests.
>
> Running time_test2 on my P-II 400 laptop produces the same total time
> (4.7300 seconds, see below). I though the new G4 was a > 1 Gflops machine
> excellent for numerical stuff but, this small comparison indicates that my standard
> PC is equally fast.... Is there something I am missing here

Take a look at the disk access times, test # 10,11,23. It is evident that Joseph's G4
(1.72 s) was a slower writer than your laptop (0.16 s). That's in fact the largest
contribution to the total test time for all platforms tested here. Its not the clock
speed after all that limits the overall performance, its the memory and hard drive bus
bottlenecks. The speed of flops by G4 is impressive, but you still need to write the
results. This I think was recognized and is the tendency on all platforms now - to get
the bus speed up from the ancient 33 / 66 mHz and widen the bus, too.
Cheers,
Pavel

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[Message index]

		Re: IDL time test with a PowerMac G4 By: gurman on Fri, 08 October 1999 00:00
		Re: IDL time test with a PowerMac G4 By: Patrick V. Ford on Fri, 08 October 1999 00:00
		Re: IDL time test with a PowerMac G4 By: pford1955 on Fri, 08 October 1999 00:00
		Re: IDL time test with a PowerMac G4 By: pford1955 on Fri, 08 October 1999 00:00
		Re: IDL time test with a PowerMac G4 By: Mark Hadfield on Fri, 08 October 1999 00:00
		Re: IDL time test with a PowerMac G4 By: Pavel Romashkin on Thu, 07 October 1999 00:00
		Re: IDL time test with a PowerMac G4 By: roy.hansen on Thu, 07 October 1999 00:00
		Re: IDL time test with a PowerMac G4 By: gurman on Thu, 07 October 1999 00:00
		Re: IDL time test with a PowerMac G4 By: mgs on Wed, 06 October 1999 00:00
		Re: IDL time test with a PowerMac G4 By: Pavel Romashkin on Wed, 06 October 1999 00:00
		Re: IDL time test with a PowerMac G4 By: m218003 on Wed, 06 October 1999 00:00
		Re: IDL time test with a PowerMac G4 By: Pavel Romashkin on Tue, 05 October 1999 00:00

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