on Tue Jul 28 2009, Edward Grace <ej.grace-AT-imperial.ac.uk> wrote:
This?
There's some interesting trickery in there by the looks of things for eliminating the optimiser nastiness - that's not something I've thought about much I'll take a look.
In the comments,
42 // operation to at least update the L1 cache. *** Note: This 43 // concern is specific to the particular application at which 44 // we're targeting the test. ***
that seems quite important but a little opaque out of context.
It means the application we were going to use this technique on was going to update a long series of accumulators, which will certainly not fit in a few registers. We wanted to force the test to reflect that reality.
One thing I take exception to is the (effective) use of the mean as a measurement of central tendency
Why?
- perhaps their trickery has eliminated the heavy tail.
Why would one assume there is a heavy tail in the first place? -- Dave Abrahams BoostPro Computing http://www.boostpro.com