> On Sun, 5 Oct 2008, NoiseEHC wrote: > >>> can you do the hash as you copy it? it should be pretty close to >>> free at that point (since the CPU is waiting for memory/flash access >>> it can do the hash calculationwhen it would otherwise be stalled) >>> >>> >> According to my measurements the GeodeLX can fetch a new cache line >> (32 bytes) every 20-25 clocks. >> Unless you can do the hash <2 clocks/byte then you will only earn the >> looping time (assuming that the hashed blocks fit into the L1 cache). > > is that speed reading from ram or from flash? > > DDR RAM, if neither the L1 nor L2 was hit. I did not measure raw NAND read speed, I do not even know how to begin with it. see: http://wiki.laptop.org/go/Geode_LX#Memory.2C_Cache_and_TLB
_______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
