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authorWilco Dijkstra <wdijkstr@arm.com>2017-08-17 16:27:20 +0100
committerWilco Dijkstra <wdijkstr@arm.com>2017-08-17 16:27:20 +0100
commitd4505b895f2aa577a6b974ab4bd0a1fd0db60ceb (patch)
tree5ae35fc88eda5f2ad45b63f4617f4a87d470d885 /sysdeps
parent34d6a3cbf2be45aa039a7eb9f0084a4b710437b8 (diff)
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Add math benchmark latency test
This patch further improves math function benchmarking by adding a latency
test in addition to throughput.  This enables more accurate comparisons of the
math functions. The latency test works by creating a dependency on the previous
iteration: func_res = F (func_res * zero + input[i]). The multiply by zero
avoids changing the input.

It reports reciprocal throughput and latency in nanoseconds (depending on the
timing header used) and max/min throughput in iterations per second:

   "workload-spec2006.wrf": {
    "reciprocal-throughput": 100,
    "latency": 200,
    "max-throughput": 1.0e+07,
    "min-throughput": 5.0e+06
   }

	* benchtests/bench-skeleton.c (main): Add support for
	latency benchmarking.
	* benchtests/scripts/bench.py: Add support for latency benchmarking.
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