49 lines
1.0 KiB
R
Executable File
49 lines
1.0 KiB
R
Executable File
#!/usr/bin/Rscript
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argv <- commandArgs(trailingOnly = TRUE)
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if (!is.null(options("matprod")[[1]])) options(matprod = "blas")
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nfrom <- 128
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nto <- 2048
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nstep <- 128
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loops <- 1
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if (length(argv) > 0) {
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for (z in 1:length(argv)) {
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if (z == 1) {
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nfrom <- as.numeric(argv[z])
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} else if (z == 2) {
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nto <- as.numeric(argv[z])
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} else if (z == 3) {
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nstep <- as.numeric(argv[z])
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} else if (z == 4) {
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loops <- as.numeric(argv[z])
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}
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}
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}
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p <- Sys.getenv("OPENBLAS_LOOPS")
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if (p != "") {
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loops <- as.numeric(p)
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}
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cat(sprintf("From %.0f To %.0f Step=%.0f Loops=%.0f\n", nfrom, nto, nstep, loops))
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cat(sprintf(" SIZE Flops Time\n"))
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n <- nfrom
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while (n <= nto) {
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A <- matrix(rnorm(n * n), nrow = n)
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ev <- 0
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z <- system.time(for (l in 1:loops) {
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ev <- eigen(A)
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})
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mflops <- (26.66 * n * n * n) * loops / (z[3] * 1e+06)
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st <- sprintf("%.0fx%.0f :", n, n)
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cat(sprintf("%20s %10.2f MFlops %10.6f sec\n", st, mflops, z[3]))
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n <- n + nstep
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}
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