1 #!/bin/sh 2 3 # 4 # Copyright (c) 2016 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 # Sched fuzz test scenario. 30 31 # "panic: sleeping thread" seen: 32 # https://people.freebsd.org/~pho/stress/log/schedfuzz.txt 33 34 [ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 35 36 sysctl kern.sched_fuzz.prof_on > /dev/null 2>&1 || exit 0 37 38 : ${pct1:=0.01} 39 : ${pct2:=0.1} 40 export pct1 pct2 41 42 seton() { 43 sysctl kern.sched_fuzz.sched_fuzz_scheduler="${pct1}%return(1)" 44 sysctl kern.sched_fuzz.sched_fuzz_sx_slock_delay="${pct1}%schedfuzz(82)" 45 sysctl kern.sched_fuzz.sched_fuzz_sx_xlock_delay="${pct1}%schedfuzz(82)" 46 sysctl kern.sched_fuzz.sched_fuzz_sx_slock_sleep="${pct1}%schedfuzz(82)" 47 sysctl kern.sched_fuzz.sched_fuzz_sx_xlock_sleep="${pct1}%schedfuzz(82)" 48 sysctl kern.sched_fuzz.sched_fuzz_mtx_spin_lock="${pct1}%schedfuzz(44)" 49 sysctl kern.sched_fuzz.sched_fuzz_mtx_spin_unlock="${pct1}%schedfuzz(44)" 50 sysctl kern.sched_fuzz.sched_fuzz_malloc="${pct1}%schedfuzz(62)" 51 sysctl kern.sched_fuzz.sched_fuzz_cv_wait="${pct2}%schedfuzz(100)" 52 sysctl kern.sched_fuzz.sched_fuzz_cv_timed_wait="${pct2}%schedfuzz(100)" 53 sysctl kern.sched_fuzz.sched_fuzz_cv_timed_wait_sig="${pct2}%schedfuzz(100)" 54 sysctl kern.sched_fuzz.sched_fuzz_mtx_lock="${pct1}%schedfuzz(22)" 55 sysctl kern.sched_fuzz.sched_fuzz_mtx_unlock="${pct1}%schedfuzz(22)" 56 sysctl kern.sched_fuzz.sched_fuzz_sleepq="${pct1}%schedfuzz(150)" 57 58 sysctl kern.sched_fuzz.prof_on=1 59 } 60 61 setoff() { 62 sysctl kern.sched_fuzz.prof_on=0 63 } 64 65 if [ $# -eq 1 ]; then 66 case "$1" in 67 on) seton 68 ;; 69 off) setoff 70 ;; 71 *) echo "Usage: $0 [on|off]" 72 exit 1 73 ;; 74 esac 75 else 76 seton 77 ./procfs.sh 78 setoff 79 fi 80