svn commit: r358161 - user/pho/stress2/misc

[Peter Holm]

Author: pho
Date: Thu Feb 20 08:58:09 2020
New Revision: 358161
URL: https://svnweb.freebsd.org/changeset/base/358161

Log:
  Added a submitted test scenario.

Added:
  user/pho/stress2/misc/collapse.sh   (contents, props changed)

Added: user/pho/stress2/misc/collapse.sh
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ user/pho/stress2/misc/collapse.sh	Thu Feb 20 08:58:09 2020	(r358161)
@@ -0,0 +1,155 @@
+#!/bin/sh
+
+#
+# Copyright (c) 2020 Jeffrey Roberson <jeff at FreeBSD.org>
+# All rights reserved.
+#
+# 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.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+#
+# $FreeBSD$
+#
+
+. ../default.cfg
+
+# "panic: freeing mapped page 0xfffffe000aa73910" seen:
+# https://people.freebsd.org/~pho/stress/log/collapse.txt
+
+odir=`pwd`
+cd /tmp
+sed '1,/^EOF/d' < $odir/$0 > collapse.c
+mycc -o collapse -Wall -Wextra -g -O0 collapse.c || exit 1
+rm -f collapse.c
+cd $odir
+
+daemon sh -c '(cd ../testcases/swap; ./swap -t 20m -i 16 -l 85)' > \
+    /dev/null 2>&1
+sleep 2
+/tmp/collapse
+while pgrep -q swap; do
+	pkill -9 swap
+done
+rm -f /tmp/collapse
+exit 0
+
+EOF
+#include <sys/param.h>
+#include <sys/mman.h>
+#include <sys/wait.h>
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+#define ADRSPACE  (256 * 1024)
+#define	DEPTH	6
+#define	WIDTH	3
+#define PARALLEL 4
+#define RUNTIME 1200
+#define CHILDTIME 5
+#define STARTTIME 5
+#define	TOUCH	16
+
+char *p;
+
+static void
+child(int depth, time_t start)
+{
+	time_t run, delay;
+	int i, shared, off;
+	int len;
+
+	/* Pick a random bit of address space to change inherit on. */
+	for (i = 0; i < ADRSPACE; i += len) {
+		shared = arc4random() & 0x1;
+		len = roundup2(arc4random() % ((ADRSPACE - i) / 4),
+		    PAGE_SIZE);
+		if (minherit(p + i, len, shared ? INHERIT_SHARE :
+		    INHERIT_COPY) != 0)
+			err(1, "minherit");
+	}
+
+	for (i = 0; depth != 0 && i < WIDTH; i++)
+		if (fork() == 0)
+			child(depth - 1, start);
+
+	/*
+	 * Touch all of the memory and exit at a random time to collapse
+	 * some portion of the chain.
+	 */
+	delay = arc4random() % (CHILDTIME - 1);
+	run = arc4random() % (CHILDTIME - delay);
+	for (;;) {
+		if (time(NULL) >= start + delay)
+			break;
+		usleep(100);
+	}
+	while (time(NULL) - start < run) {
+		off = rounddown2(arc4random() % ADRSPACE, PAGE_SIZE);
+		bzero(p + off, PAGE_SIZE);
+		usleep((run * 1000) / TOUCH);
+	}
+
+	_exit(0);
+}
+
+static void
+work(int depth)
+{
+
+	if ((p = mmap(NULL, ADRSPACE, PROT_READ | PROT_WRITE,
+	    MAP_SHARED | MAP_ANON, -1, 0)) == MAP_FAILED) {
+		if (errno == ENOMEM)
+			return;
+		err(1, "mmap()");
+	}
+	child(depth, time(NULL) + STARTTIME);
+}
+
+int
+main(void)
+{
+	pid_t pids[PARALLEL];
+	time_t start;
+	int i, n;
+
+	start = time(NULL);
+	while (time(NULL) - start < RUNTIME) {
+		n = arc4random() % PARALLEL + 1;
+		for (i = 0; i < n; i++) {
+			if ((pids[i] = fork()) == 0)
+				work(DEPTH);
+		}
+
+		sleep(CHILDTIME + STARTTIME + 1);
+
+		for (i = 0; i < n; i++)
+			if (waitpid(pids[i], NULL, 0) != pids[i])
+				err(1, "waitpid(%d)", pids[i]);
+	}
+
+	return (0);
+}