From dc1343d12e01c812d6c643a1baf079b47471c6b1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Kr=C3=B6ning?= <m.kroening@hotmail.de>
Date: Thu, 6 Jun 2019 12:53:33 +0200
Subject: [PATCH] kguebung04: Parallelize using OpenMP
---
kguebung/kguebung04/matmul/Makefile | 4 ++--
kguebung/kguebung04/matmul/main.c | 2 ++
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/kguebung/kguebung04/matmul/Makefile b/kguebung/kguebung04/matmul/Makefile
index 61edf2f..a8767bf 100644
--- a/kguebung/kguebung04/matmul/Makefile
+++ b/kguebung/kguebung04/matmul/Makefile
@@ -1,5 +1,5 @@
-CFLAGS = -Wall -Winvalid-pch -Wextra -Wpedantic
-LDFLAGS =
+CFLAGS = -fopenmp -Wall -Winvalid-pch -Wextra -Wpedantic
+LDFLAGS = -fopenmp
binaries = matmul
diff --git a/kguebung/kguebung04/matmul/main.c b/kguebung/kguebung04/matmul/main.c
index 8de511d..a7b4bc8 100644
--- a/kguebung/kguebung04/matmul/main.c
+++ b/kguebung/kguebung04/matmul/main.c
@@ -39,9 +39,11 @@ int main(int argc, char* argv[])
gettimeofday(&start, NULL);
+#pragma omp parallel for
for (i = 0; i < L; ++i) {
for (j = 0; j < N; ++j) {
double sum = 0.;
+#pragma omp simd reduction(+ : sum)
for (k = 0; k < M; ++k) {
sum += A[i][k] * B[k][j];
}
--
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