Author: KarinsDad
Date: 20:15:14 05/03/00
Go up one level in this thread
On May 03, 2000 at 20:51:04, Robert Hyatt wrote: [snip] >> >>I don't buy this memory theory. >> >>A "fair" test is one of 50% cache for each side (cache memory being more >>important) and 50% cpu cycles. But other resources should be based on what is >>required to run the program. For example, if you need 100 MB for one program, >>well, you'd better have 100 MB + OS requirements + other program requirements. >>If you need 3GB for egtbs for one program, then you'd better have it. >> >>Now, forcing resource allocation is a different issue. And, of course, there >>will be a resource delay on both sides based on what the other side is doing (if >>both sides are looking at their egtbs, then there will be a competition for head >>location on the hard disk). So, you are correct that there will be hidden >>problems (and a program could be penalized based on how it is coded since it >>could assume it can grab a large portion of the cache to run in). >> >>But I do not believe that spliting main memory 50-50 is required for a fair >>test. >> >>KarinsDad :) > > >(a) why not? > >(b) who gets the bigger chunk? > >(c) why? > >How can it _possibly_ be fair to give one program more hash than another? Or >give one program more cpu than another? > >Cache is immaterial since the thing doesn't context switch that often, >particularly with ponder=off. So cache simply doesn't factor in, and there is >no way to control it anyway. > >But for the rest??? The issue is not one of who gets more of a given resource. The issue is one of fairness. If program A works well with a small hash and program B works well with a large one, then why penalize program A over some 50/50 rule? Granted, the entire issue is moot since without knowing all of the factors, there is no way to force any level of fairness, regardless of which fairness criteria you specify. And I did not say that one program should get more cpu. I said that cpu and cache should be split evenly to be fair, but that the rest of system resources should be based on some overall "type of program" criteria. As for cache, I was talking about when pondering=on. Of course, you cannot control it, so like I said, it is moot. And, you cannot even be fair if you pick two identical machines. Program A could work well on Macs and Alphas with NT, and program B could work well with Celerons using DOS and you wouldn't even be able to come up with an identical system fair to both programs. KarinsDad :)
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