[Patch] Linpack-pc broken as a performance benchmark

[Arnold]

r193930

> On Oct 30, 2013, at 4:32 PM, Arnold Schwaighofer <aschwaighofer at apple.com> wrote:
> 
> 
>> On Oct 30, 2013, at 4:13 PM, Hal Finkel <hfinkel at anl.gov> wrote:
>> 
>> ----- Original Message -----
>>> Hi all,
>>> 
>>> SingleSource/Benchmark/Linpack is broken as a performance benchmark.
>>> It uses the time to execute a set of functions to determine the time
>>> to run another set of functions.
>>> 
>>> The attached patch fixes this by setting “ntimes” to arbitrary 10000.
>>> The benchmark then runs in about 30 secs on a recent mac.
>> 
>> 30 seconds sounds good to me. However, some of the embedded folks may complain ;) -- We should probably have it depend on whether SMALL_PROBLEM_SIZE is in effect or not. (You can add a preprocessor define in the makefile when SMALL_PROBLEM_SIZE is defined, and let that set it to be a factor of 10 smaller).
> 
> Sure,
> 
> most benchmarks I have seen seem to simply put a “#ifdef SMALL_PROBLEM_SIZE” in the c source it self. So I did that.
> 
> <0001-Linpack-Use-a-fix-number-of-iterations-for-benchmark2.patch>