Incorrect switch count in timectxsw.c

[cs5115]

Hi tsuna,

In your timectxsw.c benchmark, the variable nswitches is not correct.

It should be:
const int nswitches = iterations * 6;

and not:
const int nswitches = iterations << 2;

If you follow through the child and parent for loops you will see there are 6 context switches per iteration.

Many thanks for a really useful bit of code.

Christo