Date: Tue, 28 Jun 2016 07:11:27 +0000 (UTC) From: Peter Holm <pho@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r302245 - user/pho/stress2/misc Message-ID: <201606280711.u5S7BROx039540@repo.freebsd.org>
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Author: pho Date: Tue Jun 28 07:11:27 2016 New Revision: 302245 URL: https://svnweb.freebsd.org/changeset/base/302245 Log: Added a regression test. Sponsored by: EMC / Isilon Storage Division Added: user/pho/stress2/misc/kevent9.sh (contents, props changed) Added: user/pho/stress2/misc/kevent9.sh ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ user/pho/stress2/misc/kevent9.sh Tue Jun 28 07:11:27 2016 (r302245) @@ -0,0 +1,206 @@ +#!/bin/sh + +# $FreeBSD$ + +# Test scenario by Eric Badger <eric badgerio us> + +# userret: returning with the following locks held: +# exclusive sleep mutex process lock (process lock) r = 0 (0xcb714758) +# locked @ kern/kern_event.c:2125 +# panic: witness_warn + +# https://people.freebsd.org/~pho/stress/log/kevent9.txt +# Fixed in r302235. + +. ../default.cfg + +[ `sysctl -n hw.ncpu` -ne 4 ] && echo "For best results use hw.ncpu == 4" + +cd /tmp +cat > /tmp/kevent9-1.c <<EOF +#include <stdio.h> +#include <string.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <sys/event.h> +#include <sys/time.h> +#include <sys/wait.h> +#include <signal.h> +#include <pthread.h> +#include <pthread_np.h> +#include <unistd.h> +#include <stdlib.h> +#include <err.h> + +#define NUM_PROCS 4000 + +void *procmaker(void *arg __unused) +{ + pthread_set_name_np(pthread_self(), "procmaker"); + for (int i = 0; i < NUM_PROCS; ++i) + { + struct timespec ts; + ts.tv_sec = 0; + ts.tv_nsec = 50000; + nanosleep(&ts, NULL); + switch(fork()) + { + case -1: + err(1, "fork"); + break; + case 0: + execl("./kevent9-2", "kevent9-2", NULL); + _exit(127); + break; + default: + break; + } + } + printf("done forking\n"); + return NULL; +} + +void *reaper(void *arg __unused) +{ + pthread_set_name_np(pthread_self(), "reaper"); + int counter = 0; + while (counter < NUM_PROCS) + { + int status; + if (wait(&status) > 0) + { + ++counter; + } + } + printf("Reaped %d\n", counter); + return NULL; +} + +int main() +{ + pthread_set_name_np(pthread_self(), "main"); + + int kqfd = kqueue(); + if (kqfd == -1) + { + err(1, "kqueue()"); + } + + struct kevent change; + memset(&change, 0, sizeof(change)); + change.ident = getpid(); + change.filter = EVFILT_PROC; + change.flags = EV_ADD | EV_ENABLE; + change.fflags = NOTE_EXIT | NOTE_EXEC | NOTE_FORK | NOTE_TRACK; + + if (kevent(kqfd, &change, 1, NULL, 0, NULL) == -1) + { + err(1, "kevent change"); + } + + pthread_t t; + pthread_create(&t, NULL, procmaker, NULL); + pthread_create(&t, NULL, reaper, NULL); + + int numexecs = 0; + int numexits = 0; + int numforks = 0; + int nummults = 0; + int numchlds = 0; + int numterrs = 0; + + while (1) + { + struct kevent event; + struct timespec to; + to.tv_sec = 1; + to.tv_nsec = 0; + int ret = kevent(kqfd, NULL, 0, &event, 1, &to); + if (ret == -1) + { + err(1, "kevent event"); + } + else if (ret == 0) + { + printf("numexecs: %d numexits: %d numforks: %d numchlds: %d numterrs: %d nummults: %d\n", + numexecs, numexits, numforks, numchlds, numterrs, nummults); + + // Sometimes we miss a NOTE_EXIT. If it hasn't arrived by the timeout, bail out since + // it will probably never arrive. + break; + /* + if (numexits == NUM_PROCS) + { + break; + } + else + { + continue; + } + */ + } + + int numflags = 0; + if (event.fflags & NOTE_EXEC) + { + ++numflags; + ++numexecs; + } + if (event.fflags & NOTE_EXIT) + { + ++numflags; + ++numexits; + } + if (event.fflags & NOTE_FORK) + { + ++numflags; + ++numforks; + } + if (event.fflags & NOTE_CHILD) + { + ++numflags; + ++numchlds; + } + if (event.fflags & NOTE_TRACKERR) + { + ++numflags; + ++numterrs; + } + if (numflags > 1) + { + ++nummults; + } + + /* + struct timespec ts; + ts.tv_sec = 0; + ts.tv_nsec = 50000; + nanosleep(&ts, NULL); + */ + } + return 0; +} +EOF + +cat > /tmp/kevent9-2.c <<EOF +#include <time.h> + +int main() +{ + struct timespec ts; + ts.tv_sec = 0; + ts.tv_nsec = 1000; + nanosleep(&ts, NULL); + return 0; +} +EOF + +mycc -o kevent9-1 -Wall -Wextra -O2 -g kevent9-1.c -lpthread || exit 1 +mycc -o kevent9-2 -Wall -Wextra -O2 -g kevent9-2.c || exit 1 +rm kevent9-1.c kevent9-2.c + +start=`date '+%s'` +while [ $((`date '+%s'` - start)) -lt 300 ]; do + ./kevent9-1 > /dev/null +done +rm kevent9-1 kevent9-2
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