Initial Spring 2016 commit.

kern/test/threadtest.c

@@ -0,0 +1,146 @@
+/*
+ * Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
+ *	The President and Fellows of Harvard College.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * Thread test code.
+ */
+#include <types.h>
+#include <lib.h>
+#include <thread.h>
+#include <synch.h>
+#include <test.h>
+
+#define NTHREADS  8
+
+static struct semaphore *tsem = NULL;
+
+static
+void
+init_sem(void)
+{
+	if (tsem==NULL) {
+		tsem = sem_create("tsem", 0);
+		if (tsem == NULL) {
+			panic("threadtest: sem_create failed\n");
+		}
+	}
+}
+
+static
+void
+loudthread(void *junk, unsigned long num)
+{
+	int ch = '0' + num;
+	int i;
+
+	(void)junk;
+
+	for (i=0; i<120; i++) {
+		putch(ch);
+	}
+	V(tsem);
+}
+
+/*
+ * The idea with this is that you should see
+ *
+ *   01234567 <pause> 01234567
+ *
+ * (possibly with the numbers in different orders)
+ *
+ * The delay loop is supposed to be long enough that it should be clear
+ * if either timeslicing or the scheduler is not working right.
+ */
+static
+void
+quietthread(void *junk, unsigned long num)
+{
+	int ch = '0' + num;
+	volatile int i;
+
+	(void)junk;
+
+	putch(ch);
+	for (i=0; i<200000; i++);
+	putch(ch);
+
+	V(tsem);
+}
+
+static
+void
+runthreads(int doloud)
+{
+	char name[16];
+	int i, result;
+
+	for (i=0; i<NTHREADS; i++) {
+		snprintf(name, sizeof(name), "threadtest%d", i);
+		result = thread_fork(name, NULL,
+				     doloud ? loudthread : quietthread,
+				     NULL, i);
+		if (result) {
+			panic("threadtest: thread_fork failed %s)\n",
+			      strerror(result));
+		}
+	}
+
+	for (i=0; i<NTHREADS; i++) {
+		P(tsem);
+	}
+}
+
+
+int
+threadtest(int nargs, char **args)
+{
+	(void)nargs;
+	(void)args;
+
+	init_sem();
+	kprintf("Starting thread test...\n");
+	runthreads(1);
+	kprintf("\nThread test done.\n");
+
+	return 0;
+}
+
+int
+threadtest2(int nargs, char **args)
+{
+	(void)nargs;
+	(void)args;
+
+	init_sem();
+	kprintf("Starting thread test 2...\n");
+	runthreads(0);
+	kprintf("\nThread test 2 done.\n");
+
+	return 0;
+}