stress2: Some tests use hw.ncpu to scale the load. Tests on a box with

a large number of CPUs show that this number needs to be capped

tools/test/stress2/misc/buildkernel.sh

@@ -49,6 +49,7 @@ chmod 0777 $TMPDIR
 log=$mntpoint/log
 
 p=$((`sysctl -n hw.ncpu`+ 1))
+[ $p -gt 32 ] && p=32  # Arbitrary cap
 p=`jot -r 1 1 $p`
 echo "make -j $p buildkernel KERNCONF=GENERIC DESTDIR=$mntpoint" \
     "TARGET=amd64 TARGET_ARCH=amd64"

tools/test/stress2/misc/buildworld.sh

@@ -55,6 +55,7 @@ mkdir $TMPDIR
 chmod 0777 $TMPDIR
 
 p=$((`sysctl -n hw.ncpu`+ 1))
+[ $p -gt 32 ] && p=32  # Arbitrary cap
 timeout 20m make -i -j $p buildworld  DESTDIR=$mntpoint TARGET=amd64 \
     TARGET_ARCH=amd64 > /dev/null
 

tools/test/stress2/misc/buildworld2.sh

@@ -46,6 +46,7 @@ mkdir $TMPDIR
 chmod 0777 $TMPDIR
 
 p=$((`sysctl -n hw.ncpu`+ 1))
+[ $p -gt 32 ] && p=32  # Arbitrary cap
 make -j $p buildworld  DESTDIR=$mntpoint TARGET=amd64 TARGET_ARCH=amd64 \
     > /dev/null &
 sleep $((20 *  60))

tools/test/stress2/misc/buildworld3.sh

@@ -62,6 +62,7 @@ mkdir $TMPDIR $MAKEOBJDIRPREFIX
 chmod 0777 $TMPDIR $MAKEOBJDIRPREFIX
 
 p=$((`sysctl -n hw.ncpu`+ 1))
+[ $p -gt 32 ] && p=32  # Arbitrary cap
 su $testuser -c \
     "make -i -j $p buildworld  DESTDIR=$mntpoint TARGET=amd64 \
     TARGET_ARCH=amd64 > /dev/null" &

tools/test/stress2/misc/buildworld4.sh

@@ -50,6 +50,7 @@ mkdir $TMPDIR
 chmod 0777 $TMPDIR
 
 p=$((`sysctl -n hw.ncpu`+ 1))
+[ $p -gt 16 ] && p=16  # Arbitrary cap
 [ `sysctl -n vm.swap_total` -gt 0 ] && p=$((p * 4))
 p=`jot -r 1 1 $p`
 echo "make -i -j $p buildworld  DESTDIR=$mntpoint TARGET=amd64 "\

tools/test/stress2/misc/crossmp3.sh

@@ -41,6 +41,7 @@
 CONT=/tmp/crossmp3.continue
 if [ $# -eq 0 ]; then
 	N=`sysctl -n hw.ncpu`
+	[ $N -gt 32 ] && N=32  # Arbitrary cap
 	usermem=`sysctl -n hw.usermem`
 	[ `sysctl -n vm.swap_total` -eq 0 ] && usermem=$((usermem / 2))
 	size=$((usermem / 1024 / 1024 / N))

tools/test/stress2/misc/crossmp4.sh

@@ -40,6 +40,7 @@
 . ../default.cfg
 
 N=`sysctl -n hw.ncpu`
+[ $N -gt 32 ] && N=32  # Arbitrary cap
 usermem=`sysctl -n hw.usermem`
 [ `swapinfo | wc -l` -eq 1 ] && usermem=$((usermem/100*80))
 size=$((usermem / 1024 / 1024 - 2))

tools/test/stress2/misc/crossmp5.sh

@@ -33,6 +33,7 @@
 . ../default.cfg
 
 N=`sysctl -n hw.ncpu`
+[ $N -gt 32 ] && N=32  # Arbitrary cap
 usermem=`sysctl -n hw.usermem`
 [ `swapinfo | wc -l` -eq 1 ] && usermem=$((usermem/100*80))
 size=$((usermem / 1024 / 1024 / N))

tools/test/stress2/misc/crossmp8.sh

@@ -41,6 +41,7 @@
 
 CONT=/tmp/crossmp8.continue
 N=`sysctl -n hw.ncpu`
+[ $N -gt 32 ] && N=32	# Arbitrary cap
 usermem=`sysctl -n hw.usermem`
 [ `swapinfo | wc -l` -eq 1 ] && usermem=$((usermem/100*80))
 size=$((usermem / 1024 / 1024 / N))

tools/test/stress2/misc/gnop4.sh

@@ -34,6 +34,8 @@
 # https://people.freebsd.org/~pho/stress/log/kostik1017.txt
 # Fixed by r322175
 
+# Seen with p=513: Threads stuck in "ffsrca"
+
 . ../default.cfg
 
 gigs=9
@@ -62,6 +64,7 @@ cd $mntpoint/src
 export MAKEOBJDIRPREFIX=$mntpoint/obj
 
 p=$((`sysctl -n hw.ncpu`+ 1))
+[ $p -gt 32 ] && p=32  # Temporary work around
 timeout 10m \
     make -i -j $p buildworld  DESTDIR=$mntpoint TARGET=amd64 \
     TARGET_ARCH=amd64 > /dev/null

tools/test/stress2/misc/tmpfs13.sh

@@ -40,6 +40,7 @@
 . ../default.cfg
 
 N=`sysctl -n hw.ncpu`
+[ $N -gt 32 ] && N=32  # Arbitrary cap
 usermem=`sysctl -n hw.usermem`
 [ `swapinfo | wc -l` -eq 1 ] && usermem=$((usermem/100*80))
 size=$((usermem / 1024 / 1024 / 2))

tools/test/stress2/misc/zzbuildworld.sh

@@ -44,6 +44,7 @@ top=$mntpoint
 export MAKEOBJDIRPREFIX=$top/obj
 export log=$top/buildworld.`date +%Y%m%dT%H%M`
 n=$((`sysctl -n hw.ncpu` + 1))
+[ $n -gt 32 ] && n=32  # Arbitrary cap
 cd $src
 make -j$n buildworld > $log 2>&1 && s=0 ||s=1
 grep  '\*\*\*' $log && s=2