On Thu, 13 Apr 2006 11:29:02 -0700 "Arun Srinivasan" <arunlkml@xxxxxxxxx> wrote: > I was wondering when would we disable caching and use write through > policy as their alternatives are always efficient. Will this feature > be useful in multi-processor systems due to the cache incoherency > problems?( Even then I suppose they have hardware-circuitry to > efficiently address those issues right?) . Of course, multiprocessor systems have cache coherency mechanisms (or at least, the one I've been working on, which was a dual core MIPS RM9200). You can see on http://en.wikipedia.org/wiki/Cache_coherency, that there are multiple protocols to do so (MSI, MESI, MOSI, MOESI). Sincerly, Thomas -- PETAZZONI Thomas - thomas.petazzoni@xxxxxxxx http://{thomas,sos,kos}.enix.org - Jabber: thomas.petazzoni@xxxxxxxxx http://{agenda,livret}dulibre.org - http://www.toulibre.org Fingerprint : 0BE1 4CF3 CEA4 AC9D CC6E 1624 F653 CB30 98D3 F7A7
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