tools/testing/selftests/rcutorture/bin/kvm.sh - linux/kernel/git/paulmck/linux-rcu - Git at Google

 #!/bin/bash
 # SPDX-License-Identifier: GPL-2.0+
 #
 # Run a series of tests under KVM.  By default, this series is specified
 # by the relevant CFLIST file, but can be overridden by the --configs
 # command-line argument.
 #
 # Usage: kvm.sh [ options ]
 #
 # Copyright (C) IBM Corporation, 2011
 #
 # Authors: Paul E. McKenney <paulmck@linux.ibm.com>

 scriptname=$0
 args="$*"

 T=${TMPDIR-/tmp}/kvm.sh.$$
 trap 'rm -rf $T' 0
 mkdir $T

 cd `dirname $scriptname`/../../../../../

 # This script knows only English.
 LANG=en_US.UTF-8; export LANG

 dur=$((30*60))
 dryrun=""
 RCUTORTURE="`pwd`/tools/testing/selftests/rcutorture"; export RCUTORTURE
 PATH=${RCUTORTURE}/bin:$PATH; export PATH
 . functions.sh

 TORTURE_ALLOTED_CPUS="`identify_qemu_vcpus`"
 TORTURE_DEFCONFIG=defconfig
 TORTURE_BOOT_IMAGE=""
 TORTURE_BUILDONLY=
 TORTURE_INITRD="$RCUTORTURE/initrd"; export TORTURE_INITRD
 TORTURE_KCONFIG_ARG=""
 TORTURE_KCONFIG_GDB_ARG=""
 TORTURE_BOOT_GDB_ARG=""
 TORTURE_QEMU_GDB_ARG=""
 TORTURE_JITTER_START=""
 TORTURE_JITTER_STOP=""
 TORTURE_KCONFIG_KASAN_ARG=""
 TORTURE_KCONFIG_KCSAN_ARG=""
 TORTURE_KMAKE_ARG=""
 TORTURE_QEMU_MEM=512
 torture_qemu_mem_default=1
 TORTURE_REMOTE=
 TORTURE_SHUTDOWN_GRACE=180
 TORTURE_SUITE=rcu
 TORTURE_MOD=rcutorture
 TORTURE_TRUST_MAKE=""
 resdir=""
 configs=""
 cpus=0
 ds=`date +%Y.%m.%d-%H.%M.%S`
 jitter="-1"

 startdate="`date`"
 starttime="`get_starttime`"

 usage () {
 	echo "Usage: $scriptname optional arguments:"
 	echo "       --allcpus"
 	echo "       --bootargs kernel-boot-arguments"
 	echo "       --bootimage relative-path-to-kernel-boot-image"
 	echo "       --buildonly"
 	echo "       --configs \"config-file list w/ repeat factor (3*TINY01)\""
 	echo "       --cpus N"
 	echo "       --datestamp string"
 	echo "       --defconfig string"
 	echo "       --dryrun batches|scenarios|sched|script"
 	echo "       --duration minutes | <seconds>s | <hours>h | <days>d"
 	echo "       --gdb"
 	echo "       --help"
 	echo "       --interactive"
 	echo "       --jitter N [ maxsleep (us) [ maxspin (us) ] ]"
 	echo "       --kasan"
 	echo "       --kconfig Kconfig-options"
 	echo "       --kcsan"
 	echo "       --kmake-arg kernel-make-arguments"
 	echo "       --mac nn:nn:nn:nn:nn:nn"
 	echo "       --memory megabytes|nnnG"
 	echo "       --no-initrd"
 	echo "       --qemu-args qemu-arguments"
 	echo "       --qemu-cmd qemu-system-..."
 	echo "       --remote"
 	echo "       --results absolute-pathname"
 	echo "       --shutdown-grace seconds"
 	echo "       --torture lock|rcu|rcuscale|refscale|scf|X*"
 	echo "       --trust-make"
 	exit 1
 }

 while test $# -gt 0
 do
 	case "$1" in
 	--allcpus)
 		cpus=$TORTURE_ALLOTED_CPUS
 		max_cpus=$TORTURE_ALLOTED_CPUS
 		;;
 	--bootargs|--bootarg)
 		checkarg --bootargs "(list of kernel boot arguments)" "$#" "$2" '.*' '^--'
 		TORTURE_BOOTARGS="$TORTURE_BOOTARGS $2"
 		shift
 		;;
 	--bootimage)
 		checkarg --bootimage "(relative path to kernel boot image)" "$#" "$2" '[a-zA-Z0-9][a-zA-Z0-9_]*' '^--'
 		TORTURE_BOOT_IMAGE="$2"
 		shift
 		;;
 	--buildonly|--build-only)
 		TORTURE_BUILDONLY=1
 		;;
 	--configs|--config)
 		checkarg --configs "(list of config files)" "$#" "$2" '^[^/.a-z]\+$' '^--'
 		configs="$configs $2"
 		shift
 		;;
 	--cpus)
 		checkarg --cpus "(number)" "$#" "$2" '^[0-9]*$' '^--'
 		cpus=$2
 		TORTURE_ALLOTED_CPUS="$2"
 		if test -z "$TORTURE_REMOTE"
 		then
 			max_cpus="`identify_qemu_vcpus`"
 			if test "$TORTURE_ALLOTED_CPUS" -gt "$max_cpus"
 			then
 				TORTURE_ALLOTED_CPUS=$max_cpus
 			fi
 		fi
 		shift
 		;;
 	--datestamp)
 		checkarg --datestamp "(relative pathname)" "$#" "$2" '^[a-zA-Z0-9._/-]*$' '^--'
 		ds=$2
 		shift
 		;;
 	--defconfig)
 		checkarg --defconfig "defconfigtype" "$#" "$2" '^[^/][^/]*$' '^--'
 		TORTURE_DEFCONFIG=$2
 		shift
 		;;
 	--dryrun)
 		checkarg --dryrun "batches|sched|script" $# "$2" 'batches\|scenarios\|sched\|script' '^--'
 		dryrun=$2
 		shift
 		;;
 	--duration)
 		checkarg --duration "(minutes)" $# "$2" '^[0-9][0-9]*\(s\|m\|h\|d\|\)$' '^error'
 		mult=60
 		if echo "$2" | grep -q 's$'
 		then
 			mult=1
 		elif echo "$2" | grep -q 'h$'
 		then
 			mult=3600
 		elif echo "$2" | grep -q 'd$'
 		then
 			mult=86400
 		fi
 		ts=`echo $2 | sed -e 's/[smhd]$//'`
 		dur=$(($ts*mult))
 		shift
 		;;
 	--gdb)
 		TORTURE_KCONFIG_GDB_ARG="CONFIG_DEBUG_INFO_NONE=n CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y"; export TORTURE_KCONFIG_GDB_ARG
 		TORTURE_BOOT_GDB_ARG="nokaslr"; export TORTURE_BOOT_GDB_ARG
 		TORTURE_QEMU_GDB_ARG="-s -S"; export TORTURE_QEMU_GDB_ARG
 		;;
 	--help|-h)
 		usage
 		;;
 	--interactive)
 		TORTURE_QEMU_INTERACTIVE=1; export TORTURE_QEMU_INTERACTIVE
 		;;
 	--jitter)
 		checkarg --jitter "(# threads [ sleep [ spin ] ])" $# "$2" '^-\{,1\}[0-9]\+\( \+[0-9]\+\)\{,2\} *$' '^error$'
 		jitter="$2"
 		shift
 		;;
 	--kasan)
 		TORTURE_KCONFIG_KASAN_ARG="CONFIG_DEBUG_INFO_NONE=n CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y CONFIG_KASAN=y"; export TORTURE_KCONFIG_KASAN_ARG
 		if test -n "$torture_qemu_mem_default"
 		then
 			TORTURE_QEMU_MEM=2G
 		fi
 		;;
 	--kconfig|--kconfigs)
 		checkarg --kconfig "(Kconfig options)" $# "$2" '^CONFIG_[A-Z0-9_]\+=\([ynm]\|[0-9]\+\)\( CONFIG_[A-Z0-9_]\+=\([ynm]\|[0-9]\+\)\)*$' '^error$'
 		TORTURE_KCONFIG_ARG="`echo "$TORTURE_KCONFIG_ARG $2" | sed -e 's/^ *//' -e 's/ *$//'`"
 		shift
 		;;
 	--kcsan)
 		TORTURE_KCONFIG_KCSAN_ARG="CONFIG_DEBUG_INFO_NONE=n CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y CONFIG_KCSAN=y CONFIG_KCSAN_STRICT=y CONFIG_KCSAN_REPORT_ONCE_IN_MS=100000 CONFIG_KCSAN_VERBOSE=y CONFIG_DEBUG_LOCK_ALLOC=y CONFIG_PROVE_LOCKING=y"; export TORTURE_KCONFIG_KCSAN_ARG
 		;;
 	--kmake-arg|--kmake-args)
 		checkarg --kmake-arg "(kernel make arguments)" $# "$2" '.*' '^error$'
 		TORTURE_KMAKE_ARG="`echo "$TORTURE_KMAKE_ARG $2" | sed -e 's/^ *//' -e 's/ *$//'`"
 		shift
 		;;
 	--mac)
 		checkarg --mac "(MAC address)" $# "$2" '^\([0-9a-fA-F]\{2\}:\)\{5\}[0-9a-fA-F]\{2\}$' error
 		TORTURE_QEMU_MAC=$2
 		shift
 		;;
 	--memory)
 		checkarg --memory "(memory size)" $# "$2" '^[0-9]\+[MG]\?$' error
 		TORTURE_QEMU_MEM=$2
 		torture_qemu_mem_default=
 		shift
 		;;
 	--no-initrd)
 		TORTURE_INITRD=""; export TORTURE_INITRD
 		;;
 	--qemu-args|--qemu-arg)
 		checkarg --qemu-args "(qemu arguments)" $# "$2" '^-' '^error'
 		TORTURE_QEMU_ARG="`echo "$TORTURE_QEMU_ARG $2" | sed -e 's/^ *//' -e 's/ *$//'`"
 		shift
 		;;
 	--qemu-cmd)
 		checkarg --qemu-cmd "(qemu-system-...)" $# "$2" 'qemu-system-' '^--'
 		TORTURE_QEMU_CMD="$2"
 		shift
 		;;
 	--remote)
 		TORTURE_REMOTE=1
 		;;
 	--results)
 		checkarg --results "(absolute pathname)" "$#" "$2" '^/' '^error'
 		resdir=$2
 		shift
 		;;
 	--shutdown-grace)
 		checkarg --shutdown-grace "(seconds)" "$#" "$2" '^[0-9]*$' '^error'
 		TORTURE_SHUTDOWN_GRACE=$2
 		shift
 		;;
 	--torture)
 		checkarg --torture "(suite name)" "$#" "$2" '^\(lock\|rcu\|rcuscale\|refscale\|scf\|X.*\)$' '^--'
 		TORTURE_SUITE=$2
 		TORTURE_MOD="`echo $TORTURE_SUITE | sed -e 's/^\(lock\|rcu\|scf\)$/\1torture/'`"
 		shift
 		if test "$TORTURE_SUITE" = rcuscale || test "$TORTURE_SUITE" = refscale
 		then
 			# If you really want jitter for refscale or
 			# rcuscale, specify it after specifying the rcuscale
 			# or the refscale.  (But why jitter in these cases?)
 			jitter=0
 		fi
 		;;
 	--trust-make)
 		TORTURE_TRUST_MAKE="y"
 		;;
 	*)
 		echo Unknown argument $1
 		usage
 		;;
 	esac
 	shift
 done

 if test -n "$dryrun" || test -z "$TORTURE_INITRD" || tools/testing/selftests/rcutorture/bin/mkinitrd.sh
 then
 	:
 else
 	echo No initrd and unable to create one, aborting test >&2
 	exit 1
 fi

 CONFIGFRAG=${RCUTORTURE}/configs/${TORTURE_SUITE}; export CONFIGFRAG

 defaultconfigs="`tr '\012' ' ' < $CONFIGFRAG/CFLIST`"
 if test -z "$configs"
 then
 	configs=$defaultconfigs
 fi

 if test -z "$resdir"
 then
 	resdir=$RCUTORTURE/res
 fi

 # Create a file of test-name/#cpus pairs, sorted by decreasing #cpus.
 configs_derep=
 for CF in $configs
 do
 	case $CF in
 	[0-9]\**|[0-9][0-9]\**|[0-9][0-9][0-9]\**|[0-9][0-9][0-9][0-9]\**)
 		config_reps=`echo $CF | sed -e 's/\*.*$//'`
 		CF1=`echo $CF | sed -e 's/^[^*]*\*//'`
 		;;
 	*)
 		config_reps=1
 		CF1=$CF
 		;;
 	esac
 	for ((cur_rep=0;cur_rep<$config_reps;cur_rep++))
 	do
 		configs_derep="$configs_derep $CF1"
 	done
 done
 touch $T/cfgcpu
 configs_derep="`echo $configs_derep | sed -e "s/\<CFLIST\>/$defaultconfigs/g"`"
 if test -n "$TORTURE_KCONFIG_GDB_ARG"
 then
 	if test "`echo $configs_derep | wc -w`" -gt 1
 	then
 		echo "The --config list is: $configs_derep."
 		echo "Only one --config permitted with --gdb, terminating."
 		exit 1
 	fi
 fi
 echo 'BEGIN {' > $T/cfgcpu.awk
 for CF1 in `echo $configs_derep | tr -s ' ' '\012' | sort -u`
 do
 	if test -f "$CONFIGFRAG/$CF1"
 	then
 		if echo "$TORTURE_KCONFIG_ARG" | grep -q '\<CONFIG_NR_CPUS='
 		then
 			echo "$TORTURE_KCONFIG_ARG" | tr -s ' ' | tr ' ' '\012' > $T/KCONFIG_ARG
 			cpu_count=`configNR_CPUS.sh $T/KCONFIG_ARG`
 		else
 			cpu_count=`configNR_CPUS.sh $CONFIGFRAG/$CF1`
 		fi
 		cpu_count=`configfrag_boot_cpus "$TORTURE_BOOTARGS" "$CONFIGFRAG/$CF1" "$cpu_count"`
 		cpu_count=`configfrag_boot_maxcpus "$TORTURE_BOOTARGS" "$CONFIGFRAG/$CF1" "$cpu_count"`
 		echo 'scenariocpu["'"$CF1"'"] = '"$cpu_count"';' >> $T/cfgcpu.awk
 	else
 		echo "The --configs file $CF1 does not exist, terminating."
 		exit 1
 	fi
 done
 cat << '___EOF___' >> $T/cfgcpu.awk
 }
 {
 	for (i = 1; i <= NF; i++)
 		print $i, scenariocpu[$i];
 }
 ___EOF___
 echo $configs_derep | awk -f $T/cfgcpu.awk > $T/cfgcpu
 sort -k2nr $T/cfgcpu -T="$T" > $T/cfgcpu.sort

 # Use a greedy bin-packing algorithm, sorting the list accordingly.
 awk < $T/cfgcpu.sort > $T/cfgcpu.pack -v ncpus=$cpus '
 BEGIN {
 	njobs = 0;
 }

 {
 	# Read file of tests and corresponding required numbers of CPUs.
 	cf[njobs] = $1;
 	cpus[njobs] = $2;
 	njobs++;
 }

 END {
 	batch = 0;
 	nc = -1;

 	# Each pass through the following loop creates on test batch that
 	# can be executed concurrently given ncpus.  Note that a given test
 	# that requires more than the available CPUs will run in its own
 	# batch.  Such tests just have to make do with what is available.
 	while (nc != ncpus) {
 		batch++;
 		nc = ncpus;

 		# Each pass through the following loop considers one
 		# test for inclusion in the current batch.
 		for (i = 0; i < njobs; i++) {
 			if (done[i])
 				continue; # Already part of a batch.
 			if (nc >= cpus[i] || nc == ncpus) {

 				# This test fits into the current batch.
 				done[i] = batch;
 				nc -= cpus[i];
 				if (nc <= 0)
 					break; # Too-big test in its own batch.
 			}
 		}
 	}

 	# Dump out the tests in batch order.
 	for (b = 1; b <= batch; b++)
 		for (i = 0; i < njobs; i++)
 			if (done[i] == b)
 				print cf[i], cpus[i];
 }'

 # Generate a script to execute the tests in appropriate batches.
 cat << ___EOF___ > $T/script
 CONFIGFRAG="$CONFIGFRAG"; export CONFIGFRAG
 RCUTORTURE="$RCUTORTURE"; export RCUTORTURE
 PATH="$PATH"; export PATH
 TORTURE_ALLOTED_CPUS="$TORTURE_ALLOTED_CPUS"; export TORTURE_ALLOTED_CPUS
 TORTURE_BOOT_IMAGE="$TORTURE_BOOT_IMAGE"; export TORTURE_BOOT_IMAGE
 TORTURE_BUILDONLY="$TORTURE_BUILDONLY"; export TORTURE_BUILDONLY
 TORTURE_DEFCONFIG="$TORTURE_DEFCONFIG"; export TORTURE_DEFCONFIG
 TORTURE_INITRD="$TORTURE_INITRD"; export TORTURE_INITRD
 TORTURE_KCONFIG_ARG="$TORTURE_KCONFIG_ARG"; export TORTURE_KCONFIG_ARG
 TORTURE_KCONFIG_GDB_ARG="$TORTURE_KCONFIG_GDB_ARG"; export TORTURE_KCONFIG_GDB_ARG
 TORTURE_BOOT_GDB_ARG="$TORTURE_BOOT_GDB_ARG"; export TORTURE_BOOT_GDB_ARG
 TORTURE_QEMU_GDB_ARG="$TORTURE_QEMU_GDB_ARG"; export TORTURE_QEMU_GDB_ARG
 TORTURE_KCONFIG_KASAN_ARG="$TORTURE_KCONFIG_KASAN_ARG"; export TORTURE_KCONFIG_KASAN_ARG
 TORTURE_KCONFIG_KCSAN_ARG="$TORTURE_KCONFIG_KCSAN_ARG"; export TORTURE_KCONFIG_KCSAN_ARG
 TORTURE_KMAKE_ARG="$TORTURE_KMAKE_ARG"; export TORTURE_KMAKE_ARG
 TORTURE_MOD="$TORTURE_MOD"; export TORTURE_MOD
 TORTURE_QEMU_CMD="$TORTURE_QEMU_CMD"; export TORTURE_QEMU_CMD
 TORTURE_QEMU_INTERACTIVE="$TORTURE_QEMU_INTERACTIVE"; export TORTURE_QEMU_INTERACTIVE
 TORTURE_QEMU_MAC="$TORTURE_QEMU_MAC"; export TORTURE_QEMU_MAC
 TORTURE_QEMU_MEM="$TORTURE_QEMU_MEM"; export TORTURE_QEMU_MEM
 TORTURE_SHUTDOWN_GRACE="$TORTURE_SHUTDOWN_GRACE"; export TORTURE_SHUTDOWN_GRACE
 TORTURE_SUITE="$TORTURE_SUITE"; export TORTURE_SUITE
 TORTURE_TRUST_MAKE="$TORTURE_TRUST_MAKE"; export TORTURE_TRUST_MAKE
 if ! test -e $resdir
 then
 	mkdir -p "$resdir" || :
 fi
 mkdir -p $resdir/$ds
 TORTURE_RESDIR="$resdir/$ds"; export TORTURE_RESDIR
 TORTURE_STOPFILE="$resdir/$ds/STOP.1"; export TORTURE_STOPFILE
 echo Results directory: $resdir/$ds
 echo $scriptname $args
 touch $resdir/$ds/log
 echo $scriptname $args >> $resdir/$ds/log
 echo ${TORTURE_SUITE} > $resdir/$ds/torture_suite
 echo Build directory: `pwd` > $resdir/$ds/testid.txt
 if test -d .git
 then
 	echo Current commit: `git rev-parse HEAD` >> $resdir/$ds/testid.txt
 	echo >> $resdir/$ds/testid.txt
 	echo ' ---' Output of "'"git status"'": >> $resdir/$ds/testid.txt
 	git status >> $resdir/$ds/testid.txt
 	echo >> $resdir/$ds/testid.txt
 	echo >> $resdir/$ds/testid.txt
 	echo ' ---' Output of "'"git diff HEAD"'": >> $resdir/$ds/testid.txt
 	git diff HEAD >> $resdir/$ds/testid.txt
 fi
 ___EOF___
 kvm-assign-cpus.sh /sys/devices/system/node > $T/cpuarray.awk
 kvm-get-cpus-script.sh $T/cpuarray.awk $T/dumpbatches.awk
 cat << '___EOF___' >> $T/dumpbatches.awk
 BEGIN {
 	i = 0;
 }

 {
 	cf[i] = $1;
 	cpus[i] = $2;
 	i++;
 }

 # Dump out the scripting required to run one test batch.
 function dump(first, pastlast, batchnum,  affinitylist)
 {
 	print "echo ----Start batch " batchnum ": `date` | tee -a " rd "log";
 	print "needqemurun="
 	jn=1
 	njitter = 0;
 	split(jitter, ja);
 	if (ja[1] == -1 && ncpus == 0)
 		njitter = 1;
 	else if (ja[1] == -1)
 		njitter = ncpus;
 	else
 		njitter = ja[1];
 	print "TORTURE_JITTER_START=\". jitterstart.sh " njitter " " rd " " dur " " ja[2] " " ja[3] "\"; export TORTURE_JITTER_START";
 	print "TORTURE_JITTER_STOP=\". jitterstop.sh " rd " \"; export TORTURE_JITTER_STOP"
 	for (j = first; j < pastlast; j++) {
 		cpusr[jn] = cpus[j];
 		if (cfrep[cf[j]] == "") {
 			cfr[jn] = cf[j];
 			cfrep[cf[j]] = 1;
 		} else {
 			cfrep[cf[j]]++;
 			cfr[jn] = cf[j] "." cfrep[cf[j]];
 		}
 		builddir=rd cfr[jn] "/build";
 		if (cpusr[jn] > ncpus && ncpus != 0)
 			ovf = "-ovf";
 		else
 			ovf = "";
 		print "echo ", cfr[jn], cpusr[jn] ovf ": Starting build. `date` | tee -a " rd "log";
 		print "mkdir " rd cfr[jn] " || :";
 		print "touch " builddir ".wait";
 		affinitylist = "";
 		if (gotcpus()) {
 			affinitylist = nextcpus(cpusr[jn]);
 		}
 		if (affinitylist ~ /^[0-9,-][0-9,-]*$/)
 			print "export TORTURE_AFFINITY=" affinitylist;
 		else
 			print "export TORTURE_AFFINITY=";
 		print "kvm-test-1-run.sh " CONFIGDIR cf[j], rd cfr[jn], dur " \"" TORTURE_QEMU_ARG "\" \"" TORTURE_BOOTARGS "\" > " rd cfr[jn]  "/kvm-test-1-run.sh.out 2>&1 &"
 		print "echo ", cfr[jn], cpusr[jn] ovf ": Waiting for build to complete. `date` | tee -a " rd "log";
 		print "while test -f " builddir ".wait"
 		print "do"
 		print "\tsleep 1"
 		print "done"
 		print "echo ", cfr[jn], cpusr[jn] ovf ": Build complete. `date` | tee -a " rd "log";
 		jn++;
 	}
 	print "runfiles="
 	for (j = 1; j < jn; j++) {
 		builddir=rd cfr[j] "/build";
 		if (TORTURE_BUILDONLY)
 			print "rm -f " builddir ".ready"
 		else
 			print "mv " builddir ".ready " builddir ".run"
 			print "runfiles=\"$runfiles " builddir ".run\""
 		fi
 		print "if test -f \"" rd cfr[j] "/builtkernel\""
 		print "then"
 		print "\techo ----", cfr[j], cpusr[j] ovf ": Kernel present. `date` | tee -a " rd "log";
 		print "\tneedqemurun=1"
 		print "fi"
 	}
 	if (TORTURE_BUILDONLY && njitter != 0) {
 		njitter = 0;
 		print "echo Build-only run, so suppressing jitter | tee -a " rd "log"
 	}
 	if (TORTURE_BUILDONLY) {
 		print "needqemurun="
 	}
 	print "if test -n \"$needqemurun\""
 	print "then"
 	print "\techo ---- Starting kernels. `date` | tee -a " rd "log";
 	print "\t$TORTURE_JITTER_START";
 	print "\twhile ls $runfiles > /dev/null 2>&1"
 	print "\tdo"
 	print "\t\t:"
 	print "\tdone"
 	print "\t$TORTURE_JITTER_STOP";
 	print "\techo ---- All kernel runs complete. `date` | tee -a " rd "log";
 	print "else"
 	print "\twait"
 	print "\techo ---- No kernel runs. `date` | tee -a " rd "log";
 	print "fi"
 	for (j = 1; j < jn; j++) {
 		print "echo ----", cfr[j], cpusr[j] ovf ": Build/run results: | tee -a " rd "log";
 		print "cat " rd cfr[j]  "/kvm-test-1-run.sh.out | tee -a " rd "log";
 	}
 }

 END {
 	njobs = i;
 	nc = ncpus;
 	first = 0;
 	batchnum = 1;

 	# Each pass through the following loop considers one test.
 	for (i = 0; i < njobs; i++) {
 		if (ncpus == 0) {
 			# Sequential test specified, each test its own batch.
 			dump(i, i + 1, batchnum);
 			first = i;
 			batchnum++;
 		} else if (nc < cpus[i] && i != 0) {
 			# Out of CPUs, dump out a batch.
 			dump(first, i, batchnum);
 			first = i;
 			nc = ncpus;
 			batchnum++;
 		}
 		# Account for the CPUs needed by the current test.
 		nc -= cpus[i];
 	}
 	# Dump the last batch.
 	if (ncpus != 0)
 		dump(first, i, batchnum);
 }
 ___EOF___
 awk < $T/cfgcpu.pack \
 	-v TORTURE_BUILDONLY="$TORTURE_BUILDONLY" \
 	-v CONFIGDIR="$CONFIGFRAG/" \
 	-v RCUTORTURE="$RCUTORTURE" \
 	-v ncpus=$cpus \
 	-v jitter="$jitter" \
 	-v rd=$resdir/$ds/ \
 	-v dur=$dur \
 	-v TORTURE_QEMU_ARG="$TORTURE_QEMU_ARG" \
 	-v TORTURE_BOOTARGS="$TORTURE_BOOTARGS" \
 	-f $T/dumpbatches.awk >> $T/script
 echo kvm-end-run-stats.sh "$resdir/$ds" "$starttime" >> $T/script

 # Extract the tests and their batches from the script.
 egrep 'Start batch|Starting build\.' $T/script | grep -v ">>" |
 	sed -e 's/:.*$//' -e 's/^echo //' -e 's/-ovf//' |
 	awk '
 	/^----Start/ {
 		batchno = $3;
 		next;
 	}
 	{
 		print batchno, $1, $2
 	}' > $T/batches

 # As above, but one line per batch.
 grep -v '^#' $T/batches | awk '
 BEGIN {
 	oldbatch = 1;
 }

 {
 	if (oldbatch != $1) {
 		print ++n ". " curbatch;
 		curbatch = "";
 		oldbatch = $1;
 	}
 	curbatch = curbatch " " $2;
 }

 END {
 	print ++n ". " curbatch;
 }' > $T/scenarios

 if test "$dryrun" = script
 then
 	cat $T/script
 	exit 0
 elif test "$dryrun" = sched
 then
 	# Extract the test run schedule from the script.
 	egrep 'Start batch|Starting build\.' $T/script | grep -v ">>" |
 		sed -e 's/:.*$//' -e 's/^echo //'
 	nbuilds="`grep 'Starting build\.' $T/script |
 		  grep -v ">>" | sed -e 's/:.*$//' -e 's/^echo //' |
 		  awk '{ print $1 }' | grep -v '\.' | wc -l`"
 	echo Total number of builds: $nbuilds
 	nbatches="`grep 'Start batch' $T/script | grep -v ">>" | wc -l`"
 	echo Total number of batches: $nbatches
 	exit 0
 elif test "$dryrun" = batches
 then
 	cat $T/batches
 	exit 0
 elif test "$dryrun" = scenarios
 then
 	cat $T/scenarios
 	exit 0
 else
 	# Not a dryrun.  Record the batches and the number of CPUs, then run the script.
 	bash $T/script
 	ret=$?
 	cp $T/batches $resdir/$ds/batches
 	cp $T/scenarios $resdir/$ds/scenarios
 	echo '#' cpus=$cpus >> $resdir/$ds/batches
 	exit $ret
 fi

 # Tracing: trace_event=rcu:rcu_grace_period,rcu:rcu_future_grace_period,rcu:rcu_grace_period_init,rcu:rcu_nocb_wake,rcu:rcu_preempt_task,rcu:rcu_unlock_preempted_task,rcu:rcu_quiescent_state_report,rcu:rcu_fqs,rcu:rcu_callback,rcu:rcu_kfree_callback,rcu:rcu_batch_start,rcu:rcu_invoke_callback,rcu:rcu_invoke_kfree_callback,rcu:rcu_batch_end,rcu:rcu_torture_read,rcu:rcu_barrier
 # Function-graph tracing: ftrace=function_graph ftrace_graph_filter=sched_setaffinity,migration_cpu_stop
 # Also --kconfig "CONFIG_FUNCTION_TRACER=y CONFIG_FUNCTION_GRAPH_TRACER=y"
 # Control buffer size: --bootargs trace_buf_size=3k
 # Get trace-buffer dumps on all oopses: --bootargs ftrace_dump_on_oops
 # Ditto, but dump only the oopsing CPU: --bootargs ftrace_dump_on_oops=orig_cpu
 # Heavy-handed way to also dump on warnings: --bootargs panic_on_warn
	#!/bin/bash
	# SPDX-License-Identifier: GPL-2.0+
	#
	# Run a series of tests under KVM. By default, this series is specified
	# by the relevant CFLIST file, but can be overridden by the --configs
	# command-line argument.
	#
	# Usage: kvm.sh [ options ]
	#
	# Copyright (C) IBM Corporation, 2011
	#
	# Authors: Paul E. McKenney <paulmck@linux.ibm.com>

	scriptname=$0
	args="$*"

	T=${TMPDIR-/tmp}/kvm.sh.$$
	trap 'rm -rf $T' 0
	mkdir $T

	cd `dirname $scriptname`/../../../../../

	# This script knows only English.
	LANG=en_US.UTF-8; export LANG

	dur=$((30*60))
	dryrun=""
	RCUTORTURE="`pwd`/tools/testing/selftests/rcutorture"; export RCUTORTURE
	PATH=${RCUTORTURE}/bin:$PATH; export PATH
	. functions.sh

	TORTURE_ALLOTED_CPUS="`identify_qemu_vcpus`"
	TORTURE_DEFCONFIG=defconfig
	TORTURE_BOOT_IMAGE=""
	TORTURE_BUILDONLY=
	TORTURE_INITRD="$RCUTORTURE/initrd"; export TORTURE_INITRD
	TORTURE_KCONFIG_ARG=""
	TORTURE_KCONFIG_GDB_ARG=""
	TORTURE_BOOT_GDB_ARG=""
	TORTURE_QEMU_GDB_ARG=""
	TORTURE_JITTER_START=""
	TORTURE_JITTER_STOP=""
	TORTURE_KCONFIG_KASAN_ARG=""
	TORTURE_KCONFIG_KCSAN_ARG=""
	TORTURE_KMAKE_ARG=""
	TORTURE_QEMU_MEM=512
	torture_qemu_mem_default=1
	TORTURE_REMOTE=
	TORTURE_SHUTDOWN_GRACE=180
	TORTURE_SUITE=rcu
	TORTURE_MOD=rcutorture
	TORTURE_TRUST_MAKE=""
	resdir=""
	configs=""
	cpus=0
	ds=`date +%Y.%m.%d-%H.%M.%S`
	jitter="-1"

	startdate="`date`"
	starttime="`get_starttime`"

	usage () {
	echo "Usage: $scriptname optional arguments:"
	echo " --allcpus"
	echo " --bootargs kernel-boot-arguments"
	echo " --bootimage relative-path-to-kernel-boot-image"
	echo " --buildonly"
	echo " --configs \"config-file list w/ repeat factor (3*TINY01)\""
	echo " --cpus N"
	echo " --datestamp string"
	echo " --defconfig string"
	echo " --dryrun batches\|scenarios\|sched\|script"
	echo " --duration minutes \| <seconds>s \| <hours>h \| <days>d"
	echo " --gdb"
	echo " --help"
	echo " --interactive"
	echo " --jitter N [ maxsleep (us) [ maxspin (us) ] ]"
	echo " --kasan"
	echo " --kconfig Kconfig-options"
	echo " --kcsan"
	echo " --kmake-arg kernel-make-arguments"
	echo " --mac nn:nn:nn:nn:nn:nn"
	echo " --memory megabytes\|nnnG"
	echo " --no-initrd"
	echo " --qemu-args qemu-arguments"
	echo " --qemu-cmd qemu-system-..."
	echo " --remote"
	echo " --results absolute-pathname"
	echo " --shutdown-grace seconds"
	echo " --torture lock\|rcu\|rcuscale\|refscale\|scf\|X*"
	echo " --trust-make"
	exit 1
	}

	while test $# -gt 0
	do
	case "$1" in
	--allcpus)
	cpus=$TORTURE_ALLOTED_CPUS
	max_cpus=$TORTURE_ALLOTED_CPUS
	;;
	--bootargs\|--bootarg)
	checkarg --bootargs "(list of kernel boot arguments)" "$#" "$2" '.*' '^--'
	TORTURE_BOOTARGS="$TORTURE_BOOTARGS $2"
	shift
	;;
	--bootimage)
	checkarg --bootimage "(relative path to kernel boot image)" "$#" "$2" '[a-zA-Z0-9][a-zA-Z0-9_]*' '^--'
	TORTURE_BOOT_IMAGE="$2"
	shift
	;;
	--buildonly\|--build-only)
	TORTURE_BUILDONLY=1
	;;
	--configs\|--config)
	checkarg --configs "(list of config files)" "$#" "$2" '^[^/.a-z]\+$' '^--'
	configs="$configs $2"
	shift
	;;
	--cpus)
	checkarg --cpus "(number)" "$#" "$2" '^[0-9]*$' '^--'
	cpus=$2
	TORTURE_ALLOTED_CPUS="$2"
	if test -z "$TORTURE_REMOTE"
	then
	max_cpus="`identify_qemu_vcpus`"
	if test "$TORTURE_ALLOTED_CPUS" -gt "$max_cpus"
	then
	TORTURE_ALLOTED_CPUS=$max_cpus
	fi
	fi
	shift
	;;
	--datestamp)
	checkarg --datestamp "(relative pathname)" "$#" "$2" '^[a-zA-Z0-9._/-]*$' '^--'
	ds=$2
	shift
	;;
	--defconfig)
	checkarg --defconfig "defconfigtype" "$#" "$2" '^[^/][^/]*$' '^--'
	TORTURE_DEFCONFIG=$2
	shift
	;;
	--dryrun)
	checkarg --dryrun "batches\|sched\|script" $# "$2" 'batches\\|scenarios\\|sched\\|script' '^--'
	dryrun=$2
	shift
	;;
	--duration)
	checkarg --duration "(minutes)" $# "$2" '^[0-9][0-9]*\(s\\|m\\|h\\|d\\|\)$' '^error'
	mult=60
	if echo "$2" \| grep -q 's$'
	then
	mult=1
	elif echo "$2" \| grep -q 'h$'
	then
	mult=3600
	elif echo "$2" \| grep -q 'd$'
	then
	mult=86400
	fi
	ts=`echo $2 \| sed -e 's/[smhd]$//'`
	dur=$(($ts*mult))
	shift
	;;
	--gdb)
	TORTURE_KCONFIG_GDB_ARG="CONFIG_DEBUG_INFO_NONE=n CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y"; export TORTURE_KCONFIG_GDB_ARG
	TORTURE_BOOT_GDB_ARG="nokaslr"; export TORTURE_BOOT_GDB_ARG
	TORTURE_QEMU_GDB_ARG="-s -S"; export TORTURE_QEMU_GDB_ARG
	;;
	--help\|-h)
	usage
	;;
	--interactive)
	TORTURE_QEMU_INTERACTIVE=1; export TORTURE_QEMU_INTERACTIVE
	;;
	--jitter)
	checkarg --jitter "(# threads [ sleep [ spin ] ])" $# "$2" '^-\{,1\}[0-9]\+\( \+[0-9]\+\)\{,2\} *$' '^error$'
	jitter="$2"
	shift
	;;
	--kasan)
	TORTURE_KCONFIG_KASAN_ARG="CONFIG_DEBUG_INFO_NONE=n CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y CONFIG_KASAN=y"; export TORTURE_KCONFIG_KASAN_ARG
	if test -n "$torture_qemu_mem_default"
	then
	TORTURE_QEMU_MEM=2G
	fi
	;;
	--kconfig\|--kconfigs)
	checkarg --kconfig "(Kconfig options)" $# "$2" '^CONFIG_[A-Z0-9_]\+=\([ynm]\\|[0-9]\+\)\( CONFIG_[A-Z0-9_]\+=\([ynm]\\|[0-9]\+\)\)*$' '^error$'
	TORTURE_KCONFIG_ARG="`echo "$TORTURE_KCONFIG_ARG $2" \| sed -e 's/^ //' -e 's/ $//'`"
	shift
	;;
	--kcsan)
	TORTURE_KCONFIG_KCSAN_ARG="CONFIG_DEBUG_INFO_NONE=n CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y CONFIG_KCSAN=y CONFIG_KCSAN_STRICT=y CONFIG_KCSAN_REPORT_ONCE_IN_MS=100000 CONFIG_KCSAN_VERBOSE=y CONFIG_DEBUG_LOCK_ALLOC=y CONFIG_PROVE_LOCKING=y"; export TORTURE_KCONFIG_KCSAN_ARG
	;;
	--kmake-arg\|--kmake-args)
	checkarg --kmake-arg "(kernel make arguments)" $# "$2" '.*' '^error$'
	TORTURE_KMAKE_ARG="`echo "$TORTURE_KMAKE_ARG $2" \| sed -e 's/^ //' -e 's/ $//'`"
	shift
	;;
	--mac)
	checkarg --mac "(MAC address)" $# "$2" '^\([0-9a-fA-F]\{2\}:\)\{5\}[0-9a-fA-F]\{2\}$' error
	TORTURE_QEMU_MAC=$2
	shift
	;;
	--memory)
	checkarg --memory "(memory size)" $# "$2" '^[0-9]\+[MG]\?$' error
	TORTURE_QEMU_MEM=$2
	torture_qemu_mem_default=
	shift
	;;
	--no-initrd)
	TORTURE_INITRD=""; export TORTURE_INITRD
	;;
	--qemu-args\|--qemu-arg)
	checkarg --qemu-args "(qemu arguments)" $# "$2" '^-' '^error'
	TORTURE_QEMU_ARG="`echo "$TORTURE_QEMU_ARG $2" \| sed -e 's/^ //' -e 's/ $//'`"
	shift
	;;
	--qemu-cmd)
	checkarg --qemu-cmd "(qemu-system-...)" $# "$2" 'qemu-system-' '^--'
	TORTURE_QEMU_CMD="$2"
	shift
	;;
	--remote)
	TORTURE_REMOTE=1
	;;
	--results)
	checkarg --results "(absolute pathname)" "$#" "$2" '^/' '^error'
	resdir=$2
	shift
	;;
	--shutdown-grace)
	checkarg --shutdown-grace "(seconds)" "$#" "$2" '^[0-9]*$' '^error'
	TORTURE_SHUTDOWN_GRACE=$2
	shift
	;;
	--torture)
	checkarg --torture "(suite name)" "$#" "$2" '^\(lock\\|rcu\\|rcuscale\\|refscale\\|scf\\|X.*\)$' '^--'
	TORTURE_SUITE=$2
	TORTURE_MOD="`echo $TORTURE_SUITE \| sed -e 's/^\(lock\\|rcu\\|scf\)$/\1torture/'`"
	shift
	if test "$TORTURE_SUITE" = rcuscale \|\| test "$TORTURE_SUITE" = refscale
	then
	# If you really want jitter for refscale or
	# rcuscale, specify it after specifying the rcuscale
	# or the refscale. (But why jitter in these cases?)
	jitter=0
	fi
	;;
	--trust-make)
	TORTURE_TRUST_MAKE="y"
	;;
	*)
	echo Unknown argument $1
	usage
	;;
	esac
	shift
	done

	if test -n "$dryrun" \|\| test -z "$TORTURE_INITRD" \|\| tools/testing/selftests/rcutorture/bin/mkinitrd.sh
	then
	:
	else
	echo No initrd and unable to create one, aborting test >&2
	exit 1
	fi

	CONFIGFRAG=${RCUTORTURE}/configs/${TORTURE_SUITE}; export CONFIGFRAG

	defaultconfigs="`tr '\012' ' ' < $CONFIGFRAG/CFLIST`"
	if test -z "$configs"
	then
	configs=$defaultconfigs
	fi

	if test -z "$resdir"
	then
	resdir=$RCUTORTURE/res
	fi

	# Create a file of test-name/#cpus pairs, sorted by decreasing #cpus.
	configs_derep=
	for CF in $configs
	do
	case $CF in
	[0-9]\\|[0-9][0-9]\\|[0-9][0-9][0-9]\\|[0-9][0-9][0-9][0-9]\)
	config_reps=`echo $CF \| sed -e 's/\.$//'`
	CF1=`echo $CF \| sed -e 's/^[^]\*//'`
	;;
	*)
	config_reps=1
	CF1=$CF
	;;
	esac
	for ((cur_rep=0;cur_rep<$config_reps;cur_rep++))
	do
	configs_derep="$configs_derep $CF1"
	done
	done
	touch $T/cfgcpu
	configs_derep="`echo $configs_derep \| sed -e "s/\<CFLIST\>/$defaultconfigs/g"`"
	if test -n "$TORTURE_KCONFIG_GDB_ARG"
	then
	if test "`echo $configs_derep \| wc -w`" -gt 1
	then
	echo "The --config list is: $configs_derep."
	echo "Only one --config permitted with --gdb, terminating."
	exit 1
	fi
	fi
	echo 'BEGIN {' > $T/cfgcpu.awk
	for CF1 in `echo $configs_derep \| tr -s ' ' '\012' \| sort -u`
	do
	if test -f "$CONFIGFRAG/$CF1"
	then
	if echo "$TORTURE_KCONFIG_ARG" \| grep -q '\<CONFIG_NR_CPUS='
	then
	echo "$TORTURE_KCONFIG_ARG" \| tr -s ' ' \| tr ' ' '\012' > $T/KCONFIG_ARG
	cpu_count=`configNR_CPUS.sh $T/KCONFIG_ARG`
	else
	cpu_count=`configNR_CPUS.sh $CONFIGFRAG/$CF1`
	fi
	cpu_count=`configfrag_boot_cpus "$TORTURE_BOOTARGS" "$CONFIGFRAG/$CF1" "$cpu_count"`
	cpu_count=`configfrag_boot_maxcpus "$TORTURE_BOOTARGS" "$CONFIGFRAG/$CF1" "$cpu_count"`
	echo 'scenariocpu["'"$CF1"'"] = '"$cpu_count"';' >> $T/cfgcpu.awk
	else
	echo "The --configs file $CF1 does not exist, terminating."
	exit 1
	fi
	done
	cat << '___EOF___' >> $T/cfgcpu.awk
	}
	{
	for (i = 1; i <= NF; i++)
	print $i, scenariocpu[$i];
	}
	___EOF___
	echo $configs_derep \| awk -f $T/cfgcpu.awk > $T/cfgcpu
	sort -k2nr $T/cfgcpu -T="$T" > $T/cfgcpu.sort

	# Use a greedy bin-packing algorithm, sorting the list accordingly.
	awk < $T/cfgcpu.sort > $T/cfgcpu.pack -v ncpus=$cpus '
	BEGIN {
	njobs = 0;
	}

	{
	# Read file of tests and corresponding required numbers of CPUs.
	cf[njobs] = $1;
	cpus[njobs] = $2;
	njobs++;
	}

	END {
	batch = 0;
	nc = -1;

	# Each pass through the following loop creates on test batch that
	# can be executed concurrently given ncpus. Note that a given test
	# that requires more than the available CPUs will run in its own
	# batch. Such tests just have to make do with what is available.
	while (nc != ncpus) {
	batch++;
	nc = ncpus;

	# Each pass through the following loop considers one
	# test for inclusion in the current batch.
	for (i = 0; i < njobs; i++) {
	if (done[i])
	continue; # Already part of a batch.
	if (nc >= cpus[i] \|\| nc == ncpus) {

	# This test fits into the current batch.
	done[i] = batch;
	nc -= cpus[i];
	if (nc <= 0)
	break; # Too-big test in its own batch.
	}
	}
	}

	# Dump out the tests in batch order.
	for (b = 1; b <= batch; b++)
	for (i = 0; i < njobs; i++)
	if (done[i] == b)
	print cf[i], cpus[i];
	}'

	# Generate a script to execute the tests in appropriate batches.
	cat << ___EOF___ > $T/script
	CONFIGFRAG="$CONFIGFRAG"; export CONFIGFRAG
	RCUTORTURE="$RCUTORTURE"; export RCUTORTURE
	PATH="$PATH"; export PATH
	TORTURE_ALLOTED_CPUS="$TORTURE_ALLOTED_CPUS"; export TORTURE_ALLOTED_CPUS
	TORTURE_BOOT_IMAGE="$TORTURE_BOOT_IMAGE"; export TORTURE_BOOT_IMAGE
	TORTURE_BUILDONLY="$TORTURE_BUILDONLY"; export TORTURE_BUILDONLY
	TORTURE_DEFCONFIG="$TORTURE_DEFCONFIG"; export TORTURE_DEFCONFIG
	TORTURE_INITRD="$TORTURE_INITRD"; export TORTURE_INITRD
	TORTURE_KCONFIG_ARG="$TORTURE_KCONFIG_ARG"; export TORTURE_KCONFIG_ARG
	TORTURE_KCONFIG_GDB_ARG="$TORTURE_KCONFIG_GDB_ARG"; export TORTURE_KCONFIG_GDB_ARG
	TORTURE_BOOT_GDB_ARG="$TORTURE_BOOT_GDB_ARG"; export TORTURE_BOOT_GDB_ARG
	TORTURE_QEMU_GDB_ARG="$TORTURE_QEMU_GDB_ARG"; export TORTURE_QEMU_GDB_ARG
	TORTURE_KCONFIG_KASAN_ARG="$TORTURE_KCONFIG_KASAN_ARG"; export TORTURE_KCONFIG_KASAN_ARG
	TORTURE_KCONFIG_KCSAN_ARG="$TORTURE_KCONFIG_KCSAN_ARG"; export TORTURE_KCONFIG_KCSAN_ARG
	TORTURE_KMAKE_ARG="$TORTURE_KMAKE_ARG"; export TORTURE_KMAKE_ARG
	TORTURE_MOD="$TORTURE_MOD"; export TORTURE_MOD
	TORTURE_QEMU_CMD="$TORTURE_QEMU_CMD"; export TORTURE_QEMU_CMD
	TORTURE_QEMU_INTERACTIVE="$TORTURE_QEMU_INTERACTIVE"; export TORTURE_QEMU_INTERACTIVE
	TORTURE_QEMU_MAC="$TORTURE_QEMU_MAC"; export TORTURE_QEMU_MAC
	TORTURE_QEMU_MEM="$TORTURE_QEMU_MEM"; export TORTURE_QEMU_MEM
	TORTURE_SHUTDOWN_GRACE="$TORTURE_SHUTDOWN_GRACE"; export TORTURE_SHUTDOWN_GRACE
	TORTURE_SUITE="$TORTURE_SUITE"; export TORTURE_SUITE
	TORTURE_TRUST_MAKE="$TORTURE_TRUST_MAKE"; export TORTURE_TRUST_MAKE
	if ! test -e $resdir
	then
	mkdir -p "$resdir" \|\| :
	fi
	mkdir -p $resdir/$ds
	TORTURE_RESDIR="$resdir/$ds"; export TORTURE_RESDIR
	TORTURE_STOPFILE="$resdir/$ds/STOP.1"; export TORTURE_STOPFILE
	echo Results directory: $resdir/$ds
	echo $scriptname $args
	touch $resdir/$ds/log
	echo $scriptname $args >> $resdir/$ds/log
	echo ${TORTURE_SUITE} > $resdir/$ds/torture_suite
	echo Build directory: `pwd` > $resdir/$ds/testid.txt
	if test -d .git
	then
	echo Current commit: `git rev-parse HEAD` >> $resdir/$ds/testid.txt
	echo >> $resdir/$ds/testid.txt
	echo ' ---' Output of "'"git status"'": >> $resdir/$ds/testid.txt
	git status >> $resdir/$ds/testid.txt
	echo >> $resdir/$ds/testid.txt
	echo >> $resdir/$ds/testid.txt
	echo ' ---' Output of "'"git diff HEAD"'": >> $resdir/$ds/testid.txt
	git diff HEAD >> $resdir/$ds/testid.txt
	fi
	___EOF___
	kvm-assign-cpus.sh /sys/devices/system/node > $T/cpuarray.awk
	kvm-get-cpus-script.sh $T/cpuarray.awk $T/dumpbatches.awk
	cat << '___EOF___' >> $T/dumpbatches.awk
	BEGIN {
	i = 0;
	}

	{
	cf[i] = $1;
	cpus[i] = $2;
	i++;
	}

	# Dump out the scripting required to run one test batch.
	function dump(first, pastlast, batchnum, affinitylist)
	{
	print "echo ----Start batch " batchnum ": `date` \| tee -a " rd "log";
	print "needqemurun="
	jn=1
	njitter = 0;
	split(jitter, ja);
	if (ja[1] == -1 && ncpus == 0)
	njitter = 1;
	else if (ja[1] == -1)
	njitter = ncpus;
	else
	njitter = ja[1];
	print "TORTURE_JITTER_START=\". jitterstart.sh " njitter " " rd " " dur " " ja[2] " " ja[3] "\"; export TORTURE_JITTER_START";
	print "TORTURE_JITTER_STOP=\". jitterstop.sh " rd " \"; export TORTURE_JITTER_STOP"
	for (j = first; j < pastlast; j++) {
	cpusr[jn] = cpus[j];
	if (cfrep[cf[j]] == "") {
	cfr[jn] = cf[j];
	cfrep[cf[j]] = 1;
	} else {
	cfrep[cf[j]]++;
	cfr[jn] = cf[j] "." cfrep[cf[j]];
	}
	builddir=rd cfr[jn] "/build";
	if (cpusr[jn] > ncpus && ncpus != 0)
	ovf = "-ovf";
	else
	ovf = "";
	print "echo ", cfr[jn], cpusr[jn] ovf ": Starting build. `date` \| tee -a " rd "log";
	print "mkdir " rd cfr[jn] " \|\| :";
	print "touch " builddir ".wait";
	affinitylist = "";
	if (gotcpus()) {
	affinitylist = nextcpus(cpusr[jn]);
	}
	if (affinitylist ~ /^[0-9,-][0-9,-]*$/)
	print "export TORTURE_AFFINITY=" affinitylist;
	else
	print "export TORTURE_AFFINITY=";
	print "kvm-test-1-run.sh " CONFIGDIR cf[j], rd cfr[jn], dur " \"" TORTURE_QEMU_ARG "\" \"" TORTURE_BOOTARGS "\" > " rd cfr[jn] "/kvm-test-1-run.sh.out 2>&1 &"
	print "echo ", cfr[jn], cpusr[jn] ovf ": Waiting for build to complete. `date` \| tee -a " rd "log";
	print "while test -f " builddir ".wait"
	print "do"
	print "\tsleep 1"
	print "done"
	print "echo ", cfr[jn], cpusr[jn] ovf ": Build complete. `date` \| tee -a " rd "log";
	jn++;
	}
	print "runfiles="
	for (j = 1; j < jn; j++) {
	builddir=rd cfr[j] "/build";
	if (TORTURE_BUILDONLY)
	print "rm -f " builddir ".ready"
	else
	print "mv " builddir ".ready " builddir ".run"
	print "runfiles=\"$runfiles " builddir ".run\""
	fi
	print "if test -f \"" rd cfr[j] "/builtkernel\""
	print "then"
	print "\techo ----", cfr[j], cpusr[j] ovf ": Kernel present. `date` \| tee -a " rd "log";
	print "\tneedqemurun=1"
	print "fi"
	}
	if (TORTURE_BUILDONLY && njitter != 0) {
	njitter = 0;
	print "echo Build-only run, so suppressing jitter \| tee -a " rd "log"
	}
	if (TORTURE_BUILDONLY) {
	print "needqemurun="
	}
	print "if test -n \"$needqemurun\""
	print "then"
	print "\techo ---- Starting kernels. `date` \| tee -a " rd "log";
	print "\t$TORTURE_JITTER_START";
	print "\twhile ls $runfiles > /dev/null 2>&1"
	print "\tdo"
	print "\t\t:"
	print "\tdone"
	print "\t$TORTURE_JITTER_STOP";
	print "\techo ---- All kernel runs complete. `date` \| tee -a " rd "log";
	print "else"
	print "\twait"
	print "\techo ---- No kernel runs. `date` \| tee -a " rd "log";
	print "fi"
	for (j = 1; j < jn; j++) {
	print "echo ----", cfr[j], cpusr[j] ovf ": Build/run results: \| tee -a " rd "log";
	print "cat " rd cfr[j] "/kvm-test-1-run.sh.out \| tee -a " rd "log";
	}
	}

	END {
	njobs = i;
	nc = ncpus;
	first = 0;
	batchnum = 1;

	# Each pass through the following loop considers one test.
	for (i = 0; i < njobs; i++) {
	if (ncpus == 0) {
	# Sequential test specified, each test its own batch.
	dump(i, i + 1, batchnum);
	first = i;
	batchnum++;
	} else if (nc < cpus[i] && i != 0) {
	# Out of CPUs, dump out a batch.
	dump(first, i, batchnum);
	first = i;
	nc = ncpus;
	batchnum++;
	}
	# Account for the CPUs needed by the current test.
	nc -= cpus[i];
	}
	# Dump the last batch.
	if (ncpus != 0)
	dump(first, i, batchnum);
	}
	___EOF___
	awk < $T/cfgcpu.pack \
	-v TORTURE_BUILDONLY="$TORTURE_BUILDONLY" \
	-v CONFIGDIR="$CONFIGFRAG/" \
	-v RCUTORTURE="$RCUTORTURE" \
	-v ncpus=$cpus \
	-v jitter="$jitter" \
	-v rd=$resdir/$ds/ \
	-v dur=$dur \
	-v TORTURE_QEMU_ARG="$TORTURE_QEMU_ARG" \
	-v TORTURE_BOOTARGS="$TORTURE_BOOTARGS" \
	-f $T/dumpbatches.awk >> $T/script
	echo kvm-end-run-stats.sh "$resdir/$ds" "$starttime" >> $T/script

	# Extract the tests and their batches from the script.
	egrep 'Start batch\|Starting build\.' $T/script \| grep -v ">>" \|
	sed -e 's/:.*$//' -e 's/^echo //' -e 's/-ovf//' \|
	awk '
	/^----Start/ {
	batchno = $3;
	next;
	}
	{
	print batchno, $1, $2
	}' > $T/batches

	# As above, but one line per batch.
	grep -v '^#' $T/batches \| awk '
	BEGIN {
	oldbatch = 1;
	}

	{
	if (oldbatch != $1) {
	print ++n ". " curbatch;
	curbatch = "";
	oldbatch = $1;
	}
	curbatch = curbatch " " $2;
	}

	END {
	print ++n ". " curbatch;
	}' > $T/scenarios

	if test "$dryrun" = script
	then
	cat $T/script
	exit 0
	elif test "$dryrun" = sched
	then
	# Extract the test run schedule from the script.
	egrep 'Start batch\|Starting build\.' $T/script \| grep -v ">>" \|
	sed -e 's/:.*$//' -e 's/^echo //'
	nbuilds="`grep 'Starting build\.' $T/script \|
	grep -v ">>" \| sed -e 's/:.*$//' -e 's/^echo //' \|
	awk '{ print $1 }' \| grep -v '\.' \| wc -l`"
	echo Total number of builds: $nbuilds
	nbatches="`grep 'Start batch' $T/script \| grep -v ">>" \| wc -l`"
	echo Total number of batches: $nbatches
	exit 0
	elif test "$dryrun" = batches
	then
	cat $T/batches
	exit 0
	elif test "$dryrun" = scenarios
	then
	cat $T/scenarios
	exit 0
	else
	# Not a dryrun. Record the batches and the number of CPUs, then run the script.
	bash $T/script
	ret=$?
	cp $T/batches $resdir/$ds/batches
	cp $T/scenarios $resdir/$ds/scenarios
	echo '#' cpus=$cpus >> $resdir/$ds/batches
	exit $ret
	fi

	# Tracing: trace_event=rcu:rcu_grace_period,rcu:rcu_future_grace_period,rcu:rcu_grace_period_init,rcu:rcu_nocb_wake,rcu:rcu_preempt_task,rcu:rcu_unlock_preempted_task,rcu:rcu_quiescent_state_report,rcu:rcu_fqs,rcu:rcu_callback,rcu:rcu_kfree_callback,rcu:rcu_batch_start,rcu:rcu_invoke_callback,rcu:rcu_invoke_kfree_callback,rcu:rcu_batch_end,rcu:rcu_torture_read,rcu:rcu_barrier
	# Function-graph tracing: ftrace=function_graph ftrace_graph_filter=sched_setaffinity,migration_cpu_stop
	# Also --kconfig "CONFIG_FUNCTION_TRACER=y CONFIG_FUNCTION_GRAPH_TRACER=y"
	# Control buffer size: --bootargs trace_buf_size=3k
	# Get trace-buffer dumps on all oopses: --bootargs ftrace_dump_on_oops
	# Ditto, but dump only the oopsing CPU: --bootargs ftrace_dump_on_oops=orig_cpu
	# Heavy-handed way to also dump on warnings: --bootargs panic_on_warn