I have some confusion in understanding vector length.Is there any difference between the cache size and vector length? if difference is then, Kindly explain this with proper example. is in the following statement varying vector length mean varying cache size? CacheBench currently incorporates eight different benchmarks. Each one performs repeated access to data items on varying vector lengths. Timings are taken for each vector length over a number of iterations.
May be useful links
http://www.cplusplus.com/reference/vector/vector/size/
http://www.agner.org/optimize/blog/read.php?i=474
http://digitalassets.lib.berkeley.edu/techreports/ucb/text/CSD-92-707.pdf
They are independent variables.
Cache size is how much data is stored "locally" in some sense. Vector length is the amount of data to transmit and can thus be any number.
The measures of interest come when the vector is larger than the cache.
HTH
- Badges
- Science method