1#!/bin/sh 2 3# 4# SPDX-License-Identifier: BSD-2-Clause 5# 6# Copyright (c) 2020 Peter Holm <pho@FreeBSD.org> 7# 8# Redistribution and use in source and binary forms, with or without 9# modification, are permitted provided that the following conditions 10# are met: 11# 1. Redistributions of source code must retain the above copyright 12# notice, this list of conditions and the following disclaimer. 13# 2. Redistributions in binary form must reproduce the above copyright 14# notice, this list of conditions and the following disclaimer in the 15# documentation and/or other materials provided with the distribution. 16# 17# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27# SUCH DAMAGE. 28# 29 30# Test scenario for of non-transparent superpages. 31 32# No problems seen. 33 34. ../default.cfg 35[ `uname -p` = "i386" ] && exit 0 36[ -z "`sysctl -i vm.largepages`" ] && exit 0 37 38odir=`pwd` 39cd /tmp 40sed '1,/^EOF/d' < $odir/$0 > largepage.c 41mycc -o largepage -Wall -Wextra -g -O0 largepage.c || exit 1 42rm -f largepage.c 43cd $odir 44 45/tmp/largepage 46s=$? 47 48for path in `posixshmcontrol ls | grep largepage | awk '{print $NF}'`; do 49 echo "posixshmcontrol rm $path" 50 posixshmcontrol rm $path 51done 52rm -f ./largepage /tmp/largepage.0* /tmp/largepage 53exit 0 54 55EOF 56#include <sys/param.h> 57#include <sys/mman.h> 58#include <sys/wait.h> 59 60#include <err.h> 61#include <errno.h> 62#include <fcntl.h> 63#include <stdio.h> 64#include <stdlib.h> 65#include <string.h> 66#include <time.h> 67#include <unistd.h> 68 69static size_t ps[MAXPAGESIZES]; 70static int fd; 71 72#define PARALLEL 4 73#define RUNTIME 60 74 75static void 76work(int idx) 77{ 78 size_t len; 79 int i,r; 80 char *p; 81 volatile char val __unused; 82 char path[PATH_MAX]; 83 84 len = ps[idx]; 85 sprintf(path, "/tmp/largepage.%06d", getpid()); 86 if ((fd = shm_create_largepage(path, O_CREAT | O_RDWR, idx, 87 SHM_LARGEPAGE_ALLOC_DEFAULT, 0600)) == -1) 88 err(1,"shm_create_largepage(%zu)", len); 89 90 for (i = 0; i < 100; i++) { 91 r = ftruncate(fd, len); 92 if (r == 0) 93 break; 94 usleep(200000); 95 } 96 if (r == -1) { 97 shm_unlink(path); 98 err(1, "ftruncate(%zu)", len); 99 } 100 close(fd); 101 if ((fd = shm_open(path, O_RDWR, 0)) == -1) 102 err(1, "shm_open()"); 103 104 if ((p = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) == 105 MAP_FAILED) { 106 if (errno == ENOMEM) 107 return; 108 err(1, "mmap()"); 109 } 110 111 val = p[arc4random() % len]; 112 113 close(fd); 114 if (munmap(p, len) == -1) 115 err(1, "munmap(%p)", p); 116 if (shm_unlink(path) == -1) 117 err(1, "shm_unlink()"); 118 119 _exit(0); 120} 121 122int 123main(void) 124{ 125 pid_t pids[PARALLEL]; 126 time_t start; 127 int e, i, n, nps, status; 128 129 nps = getpagesizes(ps, MAXPAGESIZES); 130 e = 0; 131 n = 1; 132 start = time(NULL); 133 while (time(NULL) - start < RUNTIME && e == 0) { 134 for (i = 0; i < PARALLEL; i++) { 135 if ((pids[i] = fork()) == 0) 136 work(n); 137 } 138 139 for (i = 0; i < PARALLEL; i++) { 140 if (waitpid(pids[i], &status, 0) != pids[i]) 141 err(1, "waitpid(%d)", pids[i]); 142 if (status != 0) e = 1; 143 } 144 n++; 145 n = n % nps; 146 if (n == 0) /* skip 4k pages */ 147 n = 1; 148 } 149 close(fd); 150 151 return (e); 152} 153