Initial commit of Saber v0.1

Author: Alexandros Koliousis

.gitignore

@@ -0,0 +1,10 @@
+/target/
+.settings/*
+.project
+.classpath
+*.o
+*.so
+*.out
+*.txt
+*.log
+/lib/

build.sh

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+#!/bin/sh
+
+SABER="."
+[ ! -d "lib" ] && mkdir lib/
+mvn package
+cp $SABER/target/saber-0.0.1-SNAPSHOT.jar lib/
+
+exit 0

clib/CPU.c

@@ -0,0 +1,83 @@
+#include "uk_ac_imperial_lsds_saber_devices_TheCPU.h"
+#include <jni.h>
+
+#include <unistd.h>
+#include <sched.h>
+
+/* Thread affinity library calls */
+
+#ifndef __APPLE__
+static cpu_set_t fullSet;
+
+static cpu_set_t *getFullSet (void) {
+	static int init = 0;
+	if (init == 0) {
+		int i;
+		int ncores = sysconf(_SC_NPROCESSORS_ONLN);
+		CPU_ZERO (&fullSet);
+		for (i = 0; i < ncores; i++)
+			CPU_SET (i, &fullSet);
+		init = 1;
+	}
+	return &fullSet;
+}
+#endif
+
+JNIEXPORT jint JNICALL Java_uk_ac_imperial_lsds_saber_devices_TheCPU_getNumCores
+	(JNIEnv *env, jobject obj) {
+	(void) env;
+	(void) obj;
+#ifndef __APPLE__
+	int ncores = 0;
+	ncores = sysconf(_SC_NPROCESSORS_ONLN);
+	return ncores;
+#else
+	return 0;
+#endif
+}
+
+JNIEXPORT jint JNICALL Java_uk_ac_imperial_lsds_saber_devices_TheCPU_bind
+	(JNIEnv *env, jobject obj, jint core) {
+	(void) env;
+	(void) obj;
+#ifndef __APPLE__
+	cpu_set_t set;
+	CPU_ZERO (&set);
+	CPU_SET  (core, &set);
+	return sched_setaffinity (0, sizeof(set), &set);
+#else
+	(void) core;
+	return 0;
+#endif
+}
+
+JNIEXPORT jint JNICALL Java_uk_ac_imperial_lsds_saber_devices_TheCPU_unbind
+	(JNIEnv *env, jobject obj) {
+	(void) env;
+	(void) obj;
+#ifndef __APPLE__
+	return sched_setaffinity (0, sizeof (cpu_set_t), getFullSet());
+#else
+	return 0;
+#endif
+}
+
+JNIEXPORT jint JNICALL Java_uk_ac_imperial_lsds_saber_devices_TheCPU_getCpuId
+	(JNIEnv *env, jobject obj) {
+	(void) env;
+	(void) obj;
+#ifndef __APPLE__
+	int core = -1;
+	cpu_set_t set;
+	int error = sched_getaffinity (0, sizeof (set), &set);
+	if (error < 0)
+		return core; /* -1 */
+	for (core = 0; core < CPU_SETSIZE; core++) {
+		if (CPU_ISSET (core, &set))
+			break;
+	}
+	return core;
+#else
+	return 0;
+#endif
+}