func runTest(A *matrix.FloatMatrix, ntest, LB int) time.Duration {
var flags matops.Flags
var mintime time.Duration
flags = matops.LOWER
if testUpper {
flags = matops.UPPER
}
fnc := func() {
_, ERRmatops = matops.DecomposeCHOL(A, flags, LB)
}
A0 := A.Copy()
for n := 0; n < ntest; n++ {
if n > 0 {
// restore original A
A0.CopyTo(A)
}
mperf.FlushCache()
time0 := mperf.Timeit(fnc)
if n == 0 || time0 < mintime {
mintime = time0
}
if verbose {
fmt.Printf("%.4f ms\n", time0.Seconds()*1000.0)
}
}
return mintime
}
// single invocation for matops and lapack functions
func runCheck(A *matrix.FloatMatrix, LB int) (bool, time.Duration, time.Duration) {
var flags matops.Flags
N := A.Rows()
flags = matops.LOWER
lopt := linalg.OptLower
if testUpper {
flags = matops.UPPER
lopt = linalg.OptUpper
}
fnc := func() {
_, ERRmatops = matops.DecomposeCHOL(A, flags, LB)
}
if verbose && N < 10 {
fmt.Fprintf(os.Stderr, "A start:\n%v\n", A)
}
A0 := A.Copy()
mperf.FlushCache()
time0 := mperf.Timeit(fnc)
if verbose && N < 10 {
fmt.Fprintf(os.Stderr, "A end:\n%v\n", A)
}
fn2 := func() {
ERRlapack = lapack.Potrf(A0, lopt)
}
if verbose && N < 10 {
fmt.Fprintf(os.Stderr, "A0 start:\n%v\n", A0)
}
mperf.FlushCache()
time2 := mperf.Timeit(fn2)
if verbose && N < 10 {
fmt.Fprintf(os.Stderr, "A0 end:\n%v\n", A0)
}
// now A == A0 && ipiv == ipiv0
ok := A.AllClose(A0)
if !ok {
// save result to globals
Rlapack = A0
Rmatops = A
}
return ok, time0, time2
}