Hi David, On Mon, Sep 25, 2017 at 09:30:28AM +0000, David Laight wrote: > From: wei.guo.si...@gmail.com > > Sent: 21 September 2017 00:35 > > This patch adjust selftest memcmp_64 so that memcmp selftest can be > > compiled successfully. > ... > > #define ITERATIONS 10000 > > > > +#define LARGE_SIZE (5 * 1024) > > +#define LARGE_ITERATIONS 1000 > ... > > Measuring performance by doing a lot of iterations isn't ideal > and is pretty pointless. > Cold cache performance can be more useful. > Also you don't really want any dynamic branch prediction logic > tuned to the exact test you keep doing.
I think the (orignal) selftest aims at full coverage of functionality correctness, since each iteration generates a new data set by random. Thanks, - Simon
