Date: Thu, 20 Feb 2020 08:58:09 +0000 (UTC) From: Peter Holm <pho@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r358161 - user/pho/stress2/misc Message-ID: <202002200858.01K8w9OG055711@repo.freebsd.org>
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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@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); +}help
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