findVictim() will return an invalid block to be written to without doing an unnecessary replacement.
On Tue, Mar 8, 2011 at 4:03 PM, Adam Jacobvitz <[email protected]> wrote: > So how do you handle the first write into the cache before there is > anything to replace? I'm also noticing a lot of "misses" in the caches for > which there is no replacement event. > > Thanks, > > Adam > > On 3/8/2011 6:42 PM, Steve Reinhardt wrote: > >> >> >> On Tue, Mar 8, 2011 at 10:07 AM, Adam Jacobvitz <[email protected] <mailto: >> [email protected]>> wrote: >> >> Two Questions: >> >> 1) How are blocks written into the L1 or L2 cache when there is no >> block to replace? I see this thing called a "tempBlock" but I >> can't seem to find the code that writes it into the cache... >> >> >> It isn't written in... that's the point, if there's no block to replace, >> then you can't write it into the cache. In practice I don't know if that >> ever happens though. >> >> 2) In the M5 Cache structure (not Ruby) I can't seem to find any >> notion of a "way". Does the cache structure know what a "way" is? >> >> >> Not really, the code is organized based on sets rather than ways. See >> src/mem/cache/tags/cacheset.hh. >> >> Steve >> >> >> Thanks! >> >> -- Adam Jacobvitz >> Graduate Student >> Duke Computer Architecture Group >> Electrical and Computer Engineering Department >> Duke University, North Carolina >> http://arch.cs.duke.edu/ >> _______________________________________________ >> m5-users mailing list >> [email protected] <mailto:[email protected]> >> >> http://m5sim.org/cgi-bin/mailman/listinfo/m5-users >> >> >> > _______________________________________________ > m5-users mailing list > [email protected] > http://m5sim.org/cgi-bin/mailman/listinfo/m5-users >
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