svn commit: r334377 - user/pho/stress2/misc
Peter Holm
pho at FreeBSD.org
Wed May 30 08:34:21 UTC 2018
Author: pho
Date: Wed May 30 08:34:19 2018
New Revision: 334377
URL: https://svnweb.freebsd.org/changeset/base/334377
Log:
Added a "sendfile(2) over socket pairs" test.
Sponsored by: Dell EMC Isilon
Added:
user/pho/stress2/misc/sendfile15.sh (contents, props changed)
Added: user/pho/stress2/misc/sendfile15.sh
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/pho/stress2/misc/sendfile15.sh Wed May 30 08:34:19 2018 (r334377)
@@ -0,0 +1,219 @@
+#!/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.
+#
+# $FreeBSD$
+#
+
+# sendfile() over socket pairs test.
+
+# Page fault in unp_dispose+0x90 seen:
+# https://people.freebsd.org/~pho/stress/log/sendfile15.txt
+
+# "panic: bad pte va 800657000 pte 0" seen:
+# https://people.freebsd.org/~pho/stress/log/sendfile15-2.txt
+
+# "panic: vm_page_free_prep 0xfffff817e0efac10 PG_ZERO 87 ...":
+# https://people.freebsd.org/~pho/stress/log/sendfile15-2.txt
+
+. ../default.cfg
+[ `id -u` -ne 0 ] && echo "Must be root!" && exit 1
+
+dir=/tmp
+odir=`pwd`
+cd $dir
+sed '1,/^EOF/d' < $odir/$0 > $dir/sendfile15.c
+mycc -o sendfile15 -Wall -Wextra -O0 -g sendfile15.c || exit 1
+rm -f sendfile15.c
+cd $odir
+
+set -e
+mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint
+[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart
+mdconfig -a -t swap -s 2g -u $mdstart
+bsdlabel -w md$mdstart auto
+newfs $newfs_flags md${mdstart}$part > /dev/null
+mount /dev/md${mdstart}$part $mntpoint
+set +e
+
+cd $mntpoint
+dd if=/dev/random of=input bs=4k count=1 status=none
+(cd $odir/../testcases/swap; ./swap -t 5m -i 20 > /dev/null) &
+$dir/sendfile15
+s=$?
+while pgrep -q swap; do
+ pkill swap
+done
+wait
+[ -f sendfile15.core -a $s -eq 0 ] &&
+ { ls -l sendfile15.core; mv sendfile15.core $dir; s=1; }
+cd $odir
+
+for i in `jot 6`; do
+ mount | grep -q "on $mntpoint " || break
+ umount $mntpoint && break || sleep 10
+ [ $i -eq 6 ] &&
+ { echo FATAL; fstat -mf $mntpoint; exit 1; }
+done
+mdconfig -d -u $mdstart
+rm -rf $dir/sendfile15
+exit $s
+
+EOF
+#include <sys/param.h>
+#include <sys/fcntl.h>
+#include <sys/mman.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/stat.h>
+#include <sys/uio.h>
+#include <sys/wait.h>
+
+#include <machine/atomic.h>
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+
+static volatile u_int *share;
+
+#define PARALLEL 128
+#define RUNTIME (5 * 60)
+#define SYNC 0
+
+static void
+test(void)
+{
+ struct stat st;
+ off_t written, pos;
+ int child, error, from, n, status, sv[2];
+ char *buf;
+ const char *from_name;
+
+ atomic_add_int(&share[SYNC], 1);
+ while (share[SYNC] != PARALLEL)
+ ;
+
+ from_name = "input";
+
+ if ((from = open(from_name, O_RDONLY)) == -1)
+ err(1, "open read %s", from_name);
+
+ if ((error = fstat(from, &st)) == -1)
+ err(1, "stat %s", from_name);
+
+ if ((error = socketpair(AF_UNIX, SOCK_STREAM, 0, sv)) == -1)
+ err(1, "socketpair");
+
+ child = fork();
+ if (child == -1)
+ err(1, "fork");
+ else if (child != 0) {
+ setproctitle("parent");
+ close(sv[1]);
+ pos = 0;
+ for (;;) {
+ error = sendfile(from, sv[0], pos, st.st_size - pos,
+ NULL, &written, 0);
+ if (error == -1) {
+ if (errno != EAGAIN)
+ err(1, "sendfile");
+ }
+ pos += written;
+ if (pos == st.st_size)
+ break;
+ }
+ close(sv[0]);
+ if (waitpid(child, &status, 0) != child)
+ err(1, "waitpid(%d)", child);
+ } else {
+ setproctitle("child");
+ close(sv[0]);
+ buf = malloc(st.st_size);
+ if (buf == NULL)
+ err(1, "malloc %jd", st.st_size);
+ pos = 0;
+ for (;;) {
+ written = st.st_size - pos;
+ n = read(sv[1], buf + pos, written);
+ if (n == -1)
+ err(1, "read");
+ else if (n == 0)
+ errx(1, "Short read");
+ pos += n;
+ if (pos == st.st_size)
+ break;
+ }
+ close(sv[1]);
+ _exit(0);
+ }
+
+ _exit(0);
+}
+
+int
+main(void)
+{
+ pid_t pids[PARALLEL];
+ size_t len;
+ time_t start;
+ int e, i, status;
+
+ e = 0;
+ len = PAGE_SIZE;
+ if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE,
+ MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED)
+ err(1, "mmap");
+
+ start = time(NULL);
+ while ((time(NULL) - start) < RUNTIME && e == 0) {
+ share[SYNC] = 0;
+ for (i = 0; i < PARALLEL; i++) {
+ if ((pids[i] = fork()) == 0)
+ test();
+ if (pids[i] == -1)
+ err(1, "fork()");
+ }
+ for (i = 0; i < PARALLEL; i++) {
+ if (waitpid(pids[i], &status, 0) == -1)
+ err(1, "waitpid(%d)", pids[i]);
+ if (status != 0) {
+ if (WIFSIGNALED(status))
+ fprintf(stderr,
+ "pid %d exit signal %d\n",
+ pids[i], WTERMSIG(status));
+ }
+ e += status == 0 ? 0 : 1;
+ }
+ }
+
+ return (e);
+}
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