svn commit: r340666 - user/pho/stress2/misc

[Peter Holm]

Author: pho
Date: Tue Nov 20 09:34:03 2018
New Revision: 340666
URL: https://svnweb.freebsd.org/changeset/base/340666

Log:
  Added a kevent(2) / pipe(2) test scenario.
  
  Sponsored by:	Dell EMC Isilon

Added:
  user/pho/stress2/misc/kevent13.sh   (contents, props changed)

Added: user/pho/stress2/misc/kevent13.sh
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ user/pho/stress2/misc/kevent13.sh	Tue Nov 20 09:34:03 2018	(r340666)
@@ -0,0 +1,134 @@
+#!/bin/sh
+
+#
+# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+#
+# Copyright (c) 2018 Dell EMC Isilon
+#
+# 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.
+#
+# $FreeBSD$
+#
+
+# Test based on scenario by Babcia Padlina
+
+# "panic: mutex pipe mutex not owned at sys_pipe.c:1769" seen:
+# https://people.freebsd.org/~pho/stress/log/kevent13.txt
+
+. ../default.cfg
+
+odir=`pwd`
+cd /tmp
+sed '1,/^EOF/d' < $odir/$0 > kevent13.c
+cc -o kevent13 -Wall kevent13.c -lpthread
+rm -f kevent13.c
+
+[ -d "$RUNDIR" ] || mkdir -p $RUNDIR
+cd $RUNDIR
+for i in `jot 10`; do
+	/tmp/kevent13 &
+	/tmp/kevent13 &
+	wait
+done
+
+rm -f /tmp/kevent13
+exit 0
+EOF
+/*
+ * 29.08.2009, babcia padlina
+ */
+
+#include <sys/types.h>
+#include <sys/event.h>
+#include <sys/param.h>
+#include <sys/timespec.h>
+#include <unistd.h>
+
+#include <err.h>
+#include <fcntl.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define LOOPS 200000
+
+struct kevent kev, ke[2];
+struct timespec timeout;
+volatile int go;
+int fd[2], kq;
+
+void
+do_thread(void) {
+	int i;
+
+	go = 1;
+	for (i = 0; i < LOOPS; i++) {
+		if (pipe(fd) < 0)
+			err(1, "pipe");
+		memset(&kev, 0, sizeof(kev));
+		EV_SET(&kev, fd[0], EVFILT_READ, EV_ADD | EV_CLEAR, 0, 0, NULL);
+		EV_SET(&kev, fd[1], EVFILT_WRITE, EV_ADD | EV_CLEAR, 0, 0, NULL);
+
+		if (kevent(kq, &kev, 2, &ke[0], 2, &timeout) < 0)
+			err(1, "kevent");
+
+		close(fd[0]);
+		close(fd[1]);
+	}
+}
+
+void
+do_thread2(void) {
+	int i;
+
+	while (go == 0)
+		usleep(10);
+	for (i = 0; i < LOOPS; i++) {
+		close(fd[0]);
+		close(fd[1]);
+	}
+}
+
+int
+main(void) {
+	pthread_t pth, pth2;
+	int r;
+
+	if ((kq = kqueue()) < 0)
+		err(1, "kqueue");
+
+	if ((r = pthread_create(&pth, NULL, (void *)do_thread, NULL)) != 0)
+		errc(1, r, "pthread_create");
+	if ((r = pthread_create(&pth2, NULL, (void *)do_thread2, NULL)) != 0)
+		errc(1, r, "pthread_create");
+
+	timeout.tv_sec = 0;
+	timeout.tv_nsec = 1;
+
+	if ((r = pthread_join(pth, NULL)) != 0)
+		errc(1, r, "pthread_join");
+	if ((r = pthread_join(pth2, NULL)) != 0)
+		errc(1, r, "pthread_join");
+
+	return (0);
+}