Re: [Gems-users] PerfectCacheMemory in MOESI_CMP_directory


Date: Tue, 15 Apr 2008 16:46:39 -0500
From: "Mike Marty" <mike.marty@xxxxxxxxx>
Subject: Re: [Gems-users] PerfectCacheMemory in MOESI_CMP_directory
Yes, it is an infinitely growing cache. 
It is used as a hack to implement an on-chip directory.  But if I recall correctly, I use deallocate to remove something??

--Mike


On Tue, Apr 15, 2008 at 6:43 PM, Huan Fang <huanf@xxxxxx> wrote:
Hello everyone,

I know there is DirEntry which is a PerfectCacheMemory in
MOESI_CMP_directory protocol. After having a look at the
PerfectCacheMemory.h, I found the ::cacheAvail returns always true and
::cacheProbe is not implemented. Does that mean it's an *infinitely*
large cache?
I am curious about the intention to use this structure in MOESI, because
it's not present in MSI_MOSI protocol. Maybe it's intented to use this
simple structure for improving performance, but is it meaningful for
study if it has infinite size? Please point out if I have any
misunderstandings.

Best Regards,
Huan
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