Re: [Gems-users] Direct Mapped cache query

["Polina Dudnik" <pdudnik@xxxxxxxxx>]

You are probably better off just doing what Derek suggested because it is easier and the right thing to do.

Polina

On Wed, Dec 3, 2008 at 4:55 PM, Ashwath Narasimhan <nashwath@xxxxxxxxx> wrote:

Yes I was getting the assertion in PseudoLRUPolicy. Ok I will modify the code to support direct replacement. Thanks for the Tip.

regards,
Ashwath

On Wed, Dec 3, 2008 at 5:46 PM, Polina Dudnik <pdudnik@xxxxxxxxx> wrote:

I suspect the assertion you are getting is in PseudoLRUPolicy::PseudoLRUPolicy(Index, Index)? The problem is that the replacement policy implemented requires set-associativity. So, what you can do is modify the code in PseudoLRUPolicy.h to say if associativity is one, then just replace. Does that make sense?

On Wed, Dec 3, 2008 at 4:33 PM, Ashwath Narasimhan <nashwath@xxxxxxxxx> wrote:

That is correct Polina. i am getting an assertion failure. I cannot satisfy the assertion because I want to make it a direct mapped cache.Hence the associativity has to be 1. And If I do this, it gives rise to assertion failure. Ruby doesn't seem to allow associativity = 1. So how do configure Direct Mapped cache in Ruby?

On Wed, Dec 3, 2008 at 5:10 PM, Polina Dudnik <pdudnik@xxxxxxxxx> wrote:

There are two assertions in RubyConfig.C, which performs bounds checking on parameters. Is an assertion failure the error you are getting? If so, you need to make sure that your parameters satisfy the assertion.

Polina

On Wed, Dec 3, 2008 at 3:51 PM, Ashwath Narasimhan <nashwath@xxxxxxxxx> wrote:

Hi,
How can I configure RUBY as a direct mapped cache of size 64 KB? I get an error when I declare associativity as 1 and num of set bits as 10 in rubyconfig.defaults.

Thank you,
regards,
Ashwath

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Polina Dudnik
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Polina Dudnik
pdudnik@xxxxxxxxxxx
http://pages.cs.wisc.edu/~pdudnik/
Department of Computer Sciences
University of Wisconsin-Madison
6376 Computer Sciences & Statistics Bldg
1210 West Dayton Street
Madison, WI 53706-1685 USA

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-- 
Polina Dudnik
pdudnik@xxxxxxxxxxx
http://pages.cs.wisc.edu/~pdudnik/
Department of Computer Sciences
University of Wisconsin-Madison
6376 Computer Sciences & Statistics Bldg
1210 West Dayton Street
Madison, WI 53706-1685 USA