commit 74c67290c2c5b31fe3339d26a0760b24805debea
Author: Sebastián Santisi <ssantisi@fi.uba.ar>
Date:   Wed Jun 12 22:01:36 2024 +0000

    Commit inicial

diff --git a/00_pi.c b/00_pi.c
new file mode 100644
index 0000000..6ea47c1
--- /dev/null
+++ b/00_pi.c
@@ -0,0 +1,29 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+int main(int argc, char *argv[]) {
+    if(argc != 2) {
+        fprintf(stderr, "Uso: %s <tiros>\n", argv[0]);
+        return 1;
+    }
+
+    size_t tiros = atoi(argv[1]);
+
+    size_t positivos = 0;
+
+    for(size_t i = 0; i < tiros; i++) {
+        double x = (double)random() / RAND_MAX;
+        double y = (double)random() / RAND_MAX;
+        if(x * x + y * y < 1)
+            positivos++;
+    }
+
+    double pi = 4.0 * positivos / tiros;
+
+    printf("Tiros = %zd, Positivos = %zd\n", tiros, positivos);
+    printf("π ~= %.15f\n", pi);
+    printf("ε = %f%%\n", 100 * fabs(M_PI - pi) / M_PI);
+    return 0;
+}
+
diff --git a/01_pi_seed.c b/01_pi_seed.c
new file mode 100644
index 0000000..4b9aeb5
--- /dev/null
+++ b/01_pi_seed.c
@@ -0,0 +1,32 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <math.h>
+
+int main(int argc, char *argv[]) {
+    if(argc != 2) {
+        fprintf(stderr, "Uso: %s <tiros>\n", argv[0]);
+        return 1;
+    }
+
+    srand(time(NULL));
+
+    size_t tiros = atoi(argv[1]);
+
+    size_t positivos = 0;
+
+    for(size_t i = 0; i < tiros; i++) {
+        double x = (double)random() / RAND_MAX;
+        double y = (double)random() / RAND_MAX;
+        if(x * x + y * y < 1)
+            positivos++;
+    }
+
+    double pi = 4.0 * positivos / tiros;
+
+    printf("Tiros = %zd, Positivos = %zd\n", tiros, positivos);
+    printf("π ~= %.15f\n", pi);
+    printf("ε = %f%%\n", 100 * fabs(M_PI - pi) / M_PI);
+    return 0;
+}
+
diff --git a/02_pi_openmp.c b/02_pi_openmp.c
new file mode 100644
index 0000000..093734e
--- /dev/null
+++ b/02_pi_openmp.c
@@ -0,0 +1,39 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <math.h>
+#include <omp.h>
+
+int main(int argc, char *argv[]) {
+    if(argc != 2) {
+        fprintf(stderr, "Uso: %s <tiros>\n", argv[0]);
+        return 1;
+    }
+
+    printf("Hilos: %d\n", omp_get_max_threads());
+
+    size_t tiros = atoi(argv[1]);
+
+    size_t positivos = 0;
+
+    #pragma omp parallel reduction(+: positivos)
+    {
+        int seed = time(NULL) + omp_get_thread_num();
+
+        #pragma omp for
+        for(size_t i = 0; i < tiros; i++) {
+            double x = (double)rand_r(&seed) / RAND_MAX;
+            double y = (double)rand_r(&seed) / RAND_MAX;
+            if(x * x + y * y < 1)
+                positivos++;
+        }
+    }
+
+    double pi = 4.0 * positivos / tiros;
+
+    printf("Tiros = %zd, Positivos = %zd\n", tiros, positivos);
+    printf("π ~= %.15f\n", pi);
+    printf("ε = %f%%\n", 100 * fabs(M_PI - pi) / M_PI);
+    return 0;
+}
+
diff --git a/03_pi_mpi.c b/03_pi_mpi.c
new file mode 100644
index 0000000..dc2cf4c
--- /dev/null
+++ b/03_pi_mpi.c
@@ -0,0 +1,50 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <math.h>
+#include <mpi.h>
+
+
+int main(int argc, char *argv[]) {
+    if(argc != 2) {
+        fprintf(stderr, "Uso: %s <tiros>\n", argv[0]);
+        return 1;
+    }
+
+    int my_rank, num_procs;
+    MPI_Init(&argc, &argv);
+    MPI_Comm_size(MPI_COMM_WORLD, &num_procs);
+    MPI_Comm_rank(MPI_COMM_WORLD, &my_rank);
+
+    if(! my_rank)
+        printf("Procesos: %d\n", num_procs);
+
+    srand(time(NULL) + my_rank);
+
+    size_t tiros = atol(argv[1]);
+    tiros = tiros / num_procs * num_procs;
+
+    size_t positivos_parciales = 0;
+    for(size_t i = 0; i < tiros / num_procs; i++) {
+        double x = (double)random() / RAND_MAX;
+        double y = (double)random() / RAND_MAX;
+        if(x * x + y * y < 1)
+            positivos_parciales++;
+    }
+
+    size_t positivos;
+    MPI_Reduce(&positivos_parciales, &positivos, 1, MPI_LONG, MPI_SUM, 0, MPI_COMM_WORLD);
+
+    if(! my_rank) {
+        double pi = 4.0 * positivos / tiros;
+
+        printf("Tiros = %zd, Positivos = %zd\n", tiros, positivos);
+        printf("π ~= %.15f\n", pi);
+        printf("ε = %f%%\n", 100 * fabs(M_PI - pi) / M_PI);
+    }
+
+    MPI_Finalize();
+
+    return 0;
+}
+
diff --git a/hola_mpi.c b/hola_mpi.c
new file mode 100644
index 0000000..a91d1ff
--- /dev/null
+++ b/hola_mpi.c
@@ -0,0 +1,25 @@
+#include <stdio.h>
+#include <mpi.h>
+
+int main(int argc, char *argv[]) {
+    int my_rank, num_procs;
+    char nombre[MPI_MAX_PROCESSOR_NAME];
+    int len;
+    MPI_Init(&argc, &argv);
+    MPI_Comm_size(MPI_COMM_WORLD, &num_procs);
+    MPI_Comm_rank(MPI_COMM_WORLD, &my_rank);
+    MPI_Get_processor_name(nombre, &len);
+
+
+    if(! my_rank) {
+        printf("¡Holas generales!\n");
+        printf("Procesos: %d\n", num_procs);
+    }
+
+    printf("¡Hola desde el proceso %d en %s!\n", my_rank, nombre);
+
+    MPI_Finalize();
+
+    return 0;
+}
+
diff --git a/hola_openmp.c b/hola_openmp.c
new file mode 100644
index 0000000..5d2bf89
--- /dev/null
+++ b/hola_openmp.c
@@ -0,0 +1,17 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <math.h>
+#include <omp.h>
+
+int main(void) {
+    printf("¡Holas generales!\n");
+
+    printf("Hilos: %d\n", omp_get_max_threads());
+
+    #pragma omp parallel
+    printf("¡Hola desde el hilo %d!\n", omp_get_thread_num());
+
+    return 0;
+}
+
diff --git a/slurm-03_pi_mpi b/slurm-03_pi_mpi
new file mode 100644
index 0000000..22abdad
--- /dev/null
+++ b/slurm-03_pi_mpi
@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+#SBATCH -o slurm.out
+#SBATCH -e slurm.err
+#SBATCH -N 2
+#SBATCH --ntasks-per-node 32
+#SBATCH --partition=debug
+#SBATCH --time=3-0:0
+
+time mpirun -mca pml ucx --mca btl ^vader,tcp,openib,uct -x UCX_NET_DEVICES=mlx4_0:1 ./03_pi_mpi 10000000000
+
diff --git a/slurm-hola b/slurm-hola
new file mode 100644
index 0000000..841155c
--- /dev/null
+++ b/slurm-hola
@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+#SBATCH -o slurm.out
+#SBATCH -e slurm.err
+#SBATCH -N 2
+#SBATCH --ntasks-per-node 32
+#SBATCH --partition=debug
+#SBATCH --time=3-0:0
+
+mpirun ./hola_mpi
+