iPhone app Linpack

Linpack Benchmark

The LINPACK Benchmarks are a measure of a systems floating point computing power.
They measure how fast a computer solves a dense N by N system of linear equations Ax = b, which is a common task in engineering.
The solution is obtained by Gaussian elimination with partial pivoting, with 2/3N3 + 2N2 floating point operations.
The result is reported in millions of floating point operations per second (MFLOP/s, sometimes simply called FLOPS).

Results.

Mflop/s:

Millions of floating point operations per second.
A floating point operation here is a floating point addition or a floating point multiplication with 64 bit operands.
For this problem there are 2/3 n^3 + n^2 floating point operations.

Time:

The time in seconds to solve the problem, Ax=b.

Norm Res:

A check is made to show that the computed solution is correct.
The test is based on || Ax - b || / ( || A || || x || eps) where eps is described below.
The Norm Res should be about O(1) in size.
If this quantity is much larger than 1, the solution is probably incorrect.

Precision:

The relative machine precision usually the smallest positive number such that fl( 1.0 - eps ) < 1.0, where fl denotes the computed value and eps is the relative machine precision.,

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