xref: /freebsd/tools/test/stress2/misc/contigmalloc.sh (revision fd45b686f9d92f583366c75b22c04c7ee49709c0) 
1#!/bin/sh
2
3#
4# Copyright (c) 2014 EMC Corp.
5# All rights reserved.
6#
7# Redistribution and use in source and binary forms, with or without
8# modification, are permitted provided that the following conditions
9# are met:
10# 1. Redistributions of source code must retain the above copyright
11#    notice, this list of conditions and the following disclaimer.
12# 2. Redistributions in binary form must reproduce the above copyright
13#    notice, this list of conditions and the following disclaimer in the
14#    documentation and/or other materials provided with the distribution.
15#
16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26# SUCH DAMAGE.
27#
28
29# contigmalloc(9) / contigfree(9) test scenario.
30# malloc() a random number of buffers with random size and then free them.
31
32# A malloc pattern might look like this:
33# contigmalloc(186 pages)
34# contigmalloc(56 pages)
35# contigmalloc(9 pages)
36# contigmalloc(202 pages)
37# contigmalloc(49 pages)
38# contigmalloc(5 pages)
39
40# "panic: vm_reserv_alloc_contig: reserv 0xff... isn't free" seen.
41# http://people.freebsd.org/~pho/stress/log/contigmalloc.txt
42# Fixed by r271351.
43
44[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
45[ -d /usr/src/sys ] || exit 0
46builddir=`sysctl kern.version | grep @ | sed 's/.*://'`
47[ -d "$builddir" ] && export KERNBUILDDIR=$builddir || exit 0
48export SYSDIR=`echo $builddir | sed 's#/sys.*#/sys#'`
49
50. ../default.cfg
51
52odir=`pwd`
53dir=/tmp/contigmalloc
54rm -rf $dir; mkdir -p $dir
55cat > $dir/ctest.c <<EOF
56#include <sys/param.h>
57#include <sys/syscall.h>
58
59#include <err.h>
60#include <stdio.h>
61#include <stdlib.h>
62#include <time.h>
63#include <unistd.h>
64
65#define min(a,b) (((a)<(b))?(a):(b))
66#define CAP (64 * 1024 * 1024)		/* Total allocation */
67#define MAXBUF (32 * 1024 * 1024)	/* Max buffer size */
68#define N 512				/* Max allocations */
69#define RUNTIME 120
70#define TALLOC 1
71#define TFREE  2
72
73void *p[N];
74long size[N];
75int n;
76
77void
78test(int argc, char *argv[])
79{
80	long mw, s;
81	int i, no, ps, res;
82
83	if (argc == 3) {
84		no = atoi(argv[1]);
85		mw = atol(argv[2]);
86	}
87	if (argc != 3 || no == 0 || mw == 0)
88		errx(1, "Usage: %s <syscall number> <max wired>", argv[0]);
89
90	ps = getpagesize();
91	s = 0;
92	n = arc4random() % N + 1;
93	mw = mw / 100 * 10 * ps;	/* Use 10% of vm.max_user_wired */
94	mw = min(mw, CAP);
95	for (i = 0; i < n; i++) {
96		size[i] = round_page((arc4random() % MAXBUF) + 1);
97		if (s + size[i] > mw)
98			continue;
99		res = syscall(no, TALLOC, &p[i], &size[i]);
100		if (res == -1) {
101			warn("contigmalloc(%lu pages) failed at loop %d",
102			    size[i] / ps, i);
103			usleep(200000);
104		} else {
105#if defined(TEST)
106			fprintf(stderr, "contigmalloc(%lu pages)\n",
107			    size[i] / ps);
108#endif
109			s += size[i];
110		}
111	}
112
113	setproctitle("%ld Mb", s / 1024 / 1024);
114
115	for (i = 0; i < n; i++) {
116		if (p[i] != NULL) {
117			res = syscall(no, TFREE, &p[i], &size[i]);
118#if defined(TEST)
119			fprintf(stderr, "contigfree(%lu pages)\n",
120			    size[i] / ps);
121#endif
122			p[i] = NULL;
123		}
124	}
125}
126
127int
128main(int argc, char *argv[])
129{
130	time_t start;
131
132	start = time(NULL);
133	while (time(NULL) - start < RUNTIME)
134		test(argc, argv);
135
136	return (0);
137}
138
139EOF
140mycc -o /tmp/ctest -Wall -Wextra -O0 -g $dir/ctest.c || exit 1
141rm $dir/ctest.c
142
143cd $dir
144cat > Makefile <<EOF
145KMOD= cmalloc
146SRCS= cmalloc.c
147
148.include <bsd.kmod.mk>
149EOF
150
151sed '1,/^EOF2/d' < $odir/$0 > cmalloc.c
152make || exit 1
153kldload $dir/cmalloc.ko || exit 1
154
155cd $odir
156mw=`sysctl -n vm.max_user_wired` || exit 1
157/tmp/ctest `sysctl -n debug.cmalloc_offset` $mw 2>&1 | tail -5
158kldunload $dir/cmalloc.ko
159rm -rf $dir /tmp/ctest
160exit 0
161
162EOF2
163#include <sys/param.h>
164#include <sys/kernel.h>
165#include <sys/malloc.h>
166#include <sys/module.h>
167#include <sys/proc.h>
168#include <sys/sysctl.h>
169#include <sys/sysent.h>
170#include <sys/sysproto.h>
171#include <sys/systm.h>
172
173#define TALLOC 1
174#define TFREE  2
175
176/*
177 * Hook up a syscall for contigmalloc testing.
178 */
179
180struct cmalloc_args {
181        int a_op;
182	void *a_ptr;
183	void *a_size;
184};
185
186static int
187cmalloc(struct thread *td, struct cmalloc_args *uap)
188{
189	void *p;
190	unsigned long size;
191	int error;
192
193	error = copyin(uap->a_size, &size, sizeof(size));
194	if (error != 0) {
195		return (error);
196	}
197	switch (uap->a_op) {
198	case TFREE:
199		error = copyin(uap->a_ptr, &p, sizeof(p));
200		if (error == 0) {
201			if (p != NULL)
202				contigfree(p, size, M_TEMP);
203		}
204		return (error);
205
206	case TALLOC:
207		p = contigmalloc(size, M_TEMP, M_NOWAIT, 0ul, ~0ul, 4096, 0);
208		if (p != NULL) {
209			error = copyout(&p, uap->a_ptr, sizeof(p));
210			return (error);
211		}
212		return (ENOMEM);
213	}
214        return (EINVAL);
215}
216
217/*
218 * The sysent for the new syscall
219 */
220static struct sysent cmalloc_sysent = {
221	.sy_narg =  3,				/* sy_narg */
222	.sy_call = (sy_call_t *) cmalloc	/* sy_call */
223};
224
225/*
226 * The offset in sysent where the syscall is allocated.
227 */
228static int cmalloc_offset = NO_SYSCALL;
229
230SYSCTL_INT(_debug, OID_AUTO, cmalloc_offset, CTLFLAG_RD, &cmalloc_offset, 0,
231    "cmalloc syscall number");
232
233/*
234 * The function called at load/unload.
235 */
236
237static int
238cmalloc_load(struct module *module, int cmd, void *arg)
239{
240        int error = 0;
241
242        switch (cmd) {
243        case MOD_LOAD :
244                break;
245        case MOD_UNLOAD :
246                break;
247        default :
248                error = EOPNOTSUPP;
249                break;
250        }
251        return (error);
252}
253
254SYSCALL_MODULE(cmalloc_syscall, &cmalloc_offset, &cmalloc_sysent,
255    cmalloc_load, NULL);
256