1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0+
3#
4# Run a series of tests under KVM.  By default, this series is specified
5# by the relevant CFLIST file, but can be overridden by the --configs
6# command-line argument.
7#
8# Usage: kvm.sh [ options ]
9#
10# Copyright (C) IBM Corporation, 2011
11#
12# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
13
14scriptname=$0
15args="$*"
16
17T=${TMPDIR-/tmp}/kvm.sh.$$
18trap 'rm -rf $T' 0
19mkdir $T
20
21cd `dirname $scriptname`/../../../../../
22
23# This script knows only English.
24LANG=en_US.UTF-8; export LANG
25
26dur=$((30*60))
27dryrun=""
28KVM="`pwd`/tools/testing/selftests/rcutorture"; export KVM
29PATH=${KVM}/bin:$PATH; export PATH
30. functions.sh
31
32TORTURE_ALLOTED_CPUS="`identify_qemu_vcpus`"
33TORTURE_DEFCONFIG=defconfig
34TORTURE_BOOT_IMAGE=""
35TORTURE_BUILDONLY=
36TORTURE_INITRD="$KVM/initrd"; export TORTURE_INITRD
37TORTURE_KCONFIG_ARG=""
38TORTURE_KCONFIG_GDB_ARG=""
39TORTURE_BOOT_GDB_ARG=""
40TORTURE_QEMU_GDB_ARG=""
41TORTURE_JITTER_START=""
42TORTURE_JITTER_STOP=""
43TORTURE_KCONFIG_KASAN_ARG=""
44TORTURE_KCONFIG_KCSAN_ARG=""
45TORTURE_KMAKE_ARG=""
46TORTURE_QEMU_MEM=512
47TORTURE_REMOTE=
48TORTURE_SHUTDOWN_GRACE=180
49TORTURE_SUITE=rcu
50TORTURE_MOD=rcutorture
51TORTURE_TRUST_MAKE=""
52resdir=""
53configs=""
54cpus=0
55ds=`date +%Y.%m.%d-%H.%M.%S`
56jitter="-1"
57
58startdate="`date`"
59starttime="`get_starttime`"
60
61usage () {
62	echo "Usage: $scriptname optional arguments:"
63	echo "       --allcpus"
64	echo "       --bootargs kernel-boot-arguments"
65	echo "       --bootimage relative-path-to-kernel-boot-image"
66	echo "       --buildonly"
67	echo "       --configs \"config-file list w/ repeat factor (3*TINY01)\""
68	echo "       --cpus N"
69	echo "       --datestamp string"
70	echo "       --defconfig string"
71	echo "       --dryrun batches|scenarios|sched|script"
72	echo "       --duration minutes | <seconds>s | <hours>h | <days>d"
73	echo "       --gdb"
74	echo "       --help"
75	echo "       --interactive"
76	echo "       --jitter N [ maxsleep (us) [ maxspin (us) ] ]"
77	echo "       --kasan"
78	echo "       --kconfig Kconfig-options"
79	echo "       --kcsan"
80	echo "       --kmake-arg kernel-make-arguments"
81	echo "       --mac nn:nn:nn:nn:nn:nn"
82	echo "       --memory megabytes|nnnG"
83	echo "       --no-initrd"
84	echo "       --qemu-args qemu-arguments"
85	echo "       --qemu-cmd qemu-system-..."
86	echo "       --remote"
87	echo "       --results absolute-pathname"
88	echo "       --shutdown-grace seconds"
89	echo "       --torture lock|rcu|rcuscale|refscale|scf"
90	echo "       --trust-make"
91	exit 1
92}
93
94while test $# -gt 0
95do
96	case "$1" in
97	--allcpus)
98		cpus=$TORTURE_ALLOTED_CPUS
99		max_cpus=$TORTURE_ALLOTED_CPUS
100		;;
101	--bootargs|--bootarg)
102		checkarg --bootargs "(list of kernel boot arguments)" "$#" "$2" '.*' '^--'
103		TORTURE_BOOTARGS="$TORTURE_BOOTARGS $2"
104		shift
105		;;
106	--bootimage)
107		checkarg --bootimage "(relative path to kernel boot image)" "$#" "$2" '[a-zA-Z0-9][a-zA-Z0-9_]*' '^--'
108		TORTURE_BOOT_IMAGE="$2"
109		shift
110		;;
111	--buildonly|--build-only)
112		TORTURE_BUILDONLY=1
113		;;
114	--configs|--config)
115		checkarg --configs "(list of config files)" "$#" "$2" '^[^/.a-z]\+$' '^--'
116		configs="$configs $2"
117		shift
118		;;
119	--cpus)
120		checkarg --cpus "(number)" "$#" "$2" '^[0-9]*$' '^--'
121		cpus=$2
122		TORTURE_ALLOTED_CPUS="$2"
123		if test -z "$TORTURE_REMOTE"
124		then
125			max_cpus="`identify_qemu_vcpus`"
126			if test "$TORTURE_ALLOTED_CPUS" -gt "$max_cpus"
127			then
128				TORTURE_ALLOTED_CPUS=$max_cpus
129			fi
130		fi
131		shift
132		;;
133	--datestamp)
134		checkarg --datestamp "(relative pathname)" "$#" "$2" '^[a-zA-Z0-9._/-]*$' '^--'
135		ds=$2
136		shift
137		;;
138	--defconfig)
139		checkarg --defconfig "defconfigtype" "$#" "$2" '^[^/][^/]*$' '^--'
140		TORTURE_DEFCONFIG=$2
141		shift
142		;;
143	--dryrun)
144		checkarg --dryrun "batches|sched|script" $# "$2" 'batches\|scenarios\|sched\|script' '^--'
145		dryrun=$2
146		shift
147		;;
148	--duration)
149		checkarg --duration "(minutes)" $# "$2" '^[0-9][0-9]*\(s\|m\|h\|d\|\)$' '^error'
150		mult=60
151		if echo "$2" | grep -q 's$'
152		then
153			mult=1
154		elif echo "$2" | grep -q 'h$'
155		then
156			mult=3600
157		elif echo "$2" | grep -q 'd$'
158		then
159			mult=86400
160		fi
161		ts=`echo $2 | sed -e 's/[smhd]$//'`
162		dur=$(($ts*mult))
163		shift
164		;;
165	--gdb)
166		TORTURE_KCONFIG_GDB_ARG="CONFIG_DEBUG_INFO=y"; export TORTURE_KCONFIG_GDB_ARG
167		TORTURE_BOOT_GDB_ARG="nokaslr"; export TORTURE_BOOT_GDB_ARG
168		TORTURE_QEMU_GDB_ARG="-s -S"; export TORTURE_QEMU_GDB_ARG
169		;;
170	--help|-h)
171		usage
172		;;
173	--interactive)
174		TORTURE_QEMU_INTERACTIVE=1; export TORTURE_QEMU_INTERACTIVE
175		;;
176	--jitter)
177		checkarg --jitter "(# threads [ sleep [ spin ] ])" $# "$2" '^-\{,1\}[0-9]\+\( \+[0-9]\+\)\{,2\} *$' '^error$'
178		jitter="$2"
179		shift
180		;;
181	--kasan)
182		TORTURE_KCONFIG_KASAN_ARG="CONFIG_DEBUG_INFO=y CONFIG_KASAN=y"; export TORTURE_KCONFIG_KASAN_ARG
183		;;
184	--kconfig|--kconfigs)
185		checkarg --kconfig "(Kconfig options)" $# "$2" '^CONFIG_[A-Z0-9_]\+=\([ynm]\|[0-9]\+\)\( CONFIG_[A-Z0-9_]\+=\([ynm]\|[0-9]\+\)\)*$' '^error$'
186		TORTURE_KCONFIG_ARG="`echo "$TORTURE_KCONFIG_ARG $2" | sed -e 's/^ *//' -e 's/ *$//'`"
187		shift
188		;;
189	--kcsan)
190		TORTURE_KCONFIG_KCSAN_ARG="CONFIG_DEBUG_INFO=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
191		;;
192	--kmake-arg|--kmake-args)
193		checkarg --kmake-arg "(kernel make arguments)" $# "$2" '.*' '^error$'
194		TORTURE_KMAKE_ARG="`echo "$TORTURE_KMAKE_ARG $2" | sed -e 's/^ *//' -e 's/ *$//'`"
195		shift
196		;;
197	--mac)
198		checkarg --mac "(MAC address)" $# "$2" '^\([0-9a-fA-F]\{2\}:\)\{5\}[0-9a-fA-F]\{2\}$' error
199		TORTURE_QEMU_MAC=$2
200		shift
201		;;
202	--memory)
203		checkarg --memory "(memory size)" $# "$2" '^[0-9]\+[MG]\?$' error
204		TORTURE_QEMU_MEM=$2
205		shift
206		;;
207	--no-initrd)
208		TORTURE_INITRD=""; export TORTURE_INITRD
209		;;
210	--qemu-args|--qemu-arg)
211		checkarg --qemu-args "(qemu arguments)" $# "$2" '^-' '^error'
212		TORTURE_QEMU_ARG="`echo "$TORTURE_QEMU_ARG $2" | sed -e 's/^ *//' -e 's/ *$//'`"
213		shift
214		;;
215	--qemu-cmd)
216		checkarg --qemu-cmd "(qemu-system-...)" $# "$2" 'qemu-system-' '^--'
217		TORTURE_QEMU_CMD="$2"
218		shift
219		;;
220	--remote)
221		TORTURE_REMOTE=1
222		;;
223	--results)
224		checkarg --results "(absolute pathname)" "$#" "$2" '^/' '^error'
225		resdir=$2
226		shift
227		;;
228	--shutdown-grace)
229		checkarg --shutdown-grace "(seconds)" "$#" "$2" '^[0-9]*$' '^error'
230		TORTURE_SHUTDOWN_GRACE=$2
231		shift
232		;;
233	--torture)
234		checkarg --torture "(suite name)" "$#" "$2" '^\(lock\|rcu\|rcuscale\|refscale\|scf\)$' '^--'
235		TORTURE_SUITE=$2
236		TORTURE_MOD="`echo $TORTURE_SUITE | sed -e 's/^\(lock\|rcu\|scf\)$/\1torture/'`"
237		shift
238		if test "$TORTURE_SUITE" = rcuscale || test "$TORTURE_SUITE" = refscale
239		then
240			# If you really want jitter for refscale or
241			# rcuscale, specify it after specifying the rcuscale
242			# or the refscale.  (But why jitter in these cases?)
243			jitter=0
244		fi
245		;;
246	--trust-make)
247		TORTURE_TRUST_MAKE="y"
248		;;
249	*)
250		echo Unknown argument $1
251		usage
252		;;
253	esac
254	shift
255done
256
257if test -n "$dryrun" || test -z "$TORTURE_INITRD" || tools/testing/selftests/rcutorture/bin/mkinitrd.sh
258then
259	:
260else
261	echo No initrd and unable to create one, aborting test >&2
262	exit 1
263fi
264
265CONFIGFRAG=${KVM}/configs/${TORTURE_SUITE}; export CONFIGFRAG
266
267defaultconfigs="`tr '\012' ' ' < $CONFIGFRAG/CFLIST`"
268if test -z "$configs"
269then
270	configs=$defaultconfigs
271fi
272
273if test -z "$resdir"
274then
275	resdir=$KVM/res
276fi
277
278# Create a file of test-name/#cpus pairs, sorted by decreasing #cpus.
279configs_derep=
280for CF in $configs
281do
282	case $CF in
283	[0-9]\**|[0-9][0-9]\**|[0-9][0-9][0-9]\**)
284		config_reps=`echo $CF | sed -e 's/\*.*$//'`
285		CF1=`echo $CF | sed -e 's/^[^*]*\*//'`
286		;;
287	*)
288		config_reps=1
289		CF1=$CF
290		;;
291	esac
292	for ((cur_rep=0;cur_rep<$config_reps;cur_rep++))
293	do
294		configs_derep="$configs_derep $CF1"
295	done
296done
297touch $T/cfgcpu
298configs_derep="`echo $configs_derep | sed -e "s/\<CFLIST\>/$defaultconfigs/g"`"
299if test -n "$TORTURE_KCONFIG_GDB_ARG"
300then
301	if test "`echo $configs_derep | wc -w`" -gt 1
302	then
303		echo "The --config list is: $configs_derep."
304		echo "Only one --config permitted with --gdb, terminating."
305		exit 1
306	fi
307fi
308echo 'BEGIN {' > $T/cfgcpu.awk
309for CF1 in `echo $configs_derep | tr -s ' ' '\012' | sort -u`
310do
311	if test -f "$CONFIGFRAG/$CF1"
312	then
313		if echo "$TORTURE_KCONFIG_ARG" | grep -q '\<CONFIG_NR_CPUS='
314		then
315			echo "$TORTURE_KCONFIG_ARG" | tr -s ' ' | tr ' ' '\012' > $T/KCONFIG_ARG
316			cpu_count=`configNR_CPUS.sh $T/KCONFIG_ARG`
317		else
318			cpu_count=`configNR_CPUS.sh $CONFIGFRAG/$CF1`
319		fi
320		cpu_count=`configfrag_boot_cpus "$TORTURE_BOOTARGS" "$CONFIGFRAG/$CF1" "$cpu_count"`
321		cpu_count=`configfrag_boot_maxcpus "$TORTURE_BOOTARGS" "$CONFIGFRAG/$CF1" "$cpu_count"`
322		echo 'scenariocpu["'"$CF1"'"] = '"$cpu_count"';' >> $T/cfgcpu.awk
323	else
324		echo "The --configs file $CF1 does not exist, terminating."
325		exit 1
326	fi
327done
328cat << '___EOF___' >> $T/cfgcpu.awk
329}
330{
331	for (i = 1; i <= NF; i++)
332		print $i, scenariocpu[$i];
333}
334___EOF___
335echo $configs_derep | awk -f $T/cfgcpu.awk > $T/cfgcpu
336sort -k2nr $T/cfgcpu -T="$T" > $T/cfgcpu.sort
337
338# Use a greedy bin-packing algorithm, sorting the list accordingly.
339awk < $T/cfgcpu.sort > $T/cfgcpu.pack -v ncpus=$cpus '
340BEGIN {
341	njobs = 0;
342}
343
344{
345	# Read file of tests and corresponding required numbers of CPUs.
346	cf[njobs] = $1;
347	cpus[njobs] = $2;
348	njobs++;
349}
350
351END {
352	batch = 0;
353	nc = -1;
354
355	# Each pass through the following loop creates on test batch that
356	# can be executed concurrently given ncpus.  Note that a given test
357	# that requires more than the available CPUs will run in its own
358	# batch.  Such tests just have to make do with what is available.
359	while (nc != ncpus) {
360		batch++;
361		nc = ncpus;
362
363		# Each pass through the following loop considers one
364		# test for inclusion in the current batch.
365		for (i = 0; i < njobs; i++) {
366			if (done[i])
367				continue; # Already part of a batch.
368			if (nc >= cpus[i] || nc == ncpus) {
369
370				# This test fits into the current batch.
371				done[i] = batch;
372				nc -= cpus[i];
373				if (nc <= 0)
374					break; # Too-big test in its own batch.
375			}
376		}
377	}
378
379	# Dump out the tests in batch order.
380	for (b = 1; b <= batch; b++)
381		for (i = 0; i < njobs; i++)
382			if (done[i] == b)
383				print cf[i], cpus[i];
384}'
385
386# Generate a script to execute the tests in appropriate batches.
387cat << ___EOF___ > $T/script
388CONFIGFRAG="$CONFIGFRAG"; export CONFIGFRAG
389KVM="$KVM"; export KVM
390PATH="$PATH"; export PATH
391TORTURE_ALLOTED_CPUS="$TORTURE_ALLOTED_CPUS"; export TORTURE_ALLOTED_CPUS
392TORTURE_BOOT_IMAGE="$TORTURE_BOOT_IMAGE"; export TORTURE_BOOT_IMAGE
393TORTURE_BUILDONLY="$TORTURE_BUILDONLY"; export TORTURE_BUILDONLY
394TORTURE_DEFCONFIG="$TORTURE_DEFCONFIG"; export TORTURE_DEFCONFIG
395TORTURE_INITRD="$TORTURE_INITRD"; export TORTURE_INITRD
396TORTURE_KCONFIG_ARG="$TORTURE_KCONFIG_ARG"; export TORTURE_KCONFIG_ARG
397TORTURE_KCONFIG_GDB_ARG="$TORTURE_KCONFIG_GDB_ARG"; export TORTURE_KCONFIG_GDB_ARG
398TORTURE_BOOT_GDB_ARG="$TORTURE_BOOT_GDB_ARG"; export TORTURE_BOOT_GDB_ARG
399TORTURE_QEMU_GDB_ARG="$TORTURE_QEMU_GDB_ARG"; export TORTURE_QEMU_GDB_ARG
400TORTURE_KCONFIG_KASAN_ARG="$TORTURE_KCONFIG_KASAN_ARG"; export TORTURE_KCONFIG_KASAN_ARG
401TORTURE_KCONFIG_KCSAN_ARG="$TORTURE_KCONFIG_KCSAN_ARG"; export TORTURE_KCONFIG_KCSAN_ARG
402TORTURE_KMAKE_ARG="$TORTURE_KMAKE_ARG"; export TORTURE_KMAKE_ARG
403TORTURE_MOD="$TORTURE_MOD"; export TORTURE_MOD
404TORTURE_QEMU_CMD="$TORTURE_QEMU_CMD"; export TORTURE_QEMU_CMD
405TORTURE_QEMU_INTERACTIVE="$TORTURE_QEMU_INTERACTIVE"; export TORTURE_QEMU_INTERACTIVE
406TORTURE_QEMU_MAC="$TORTURE_QEMU_MAC"; export TORTURE_QEMU_MAC
407TORTURE_QEMU_MEM="$TORTURE_QEMU_MEM"; export TORTURE_QEMU_MEM
408TORTURE_SHUTDOWN_GRACE="$TORTURE_SHUTDOWN_GRACE"; export TORTURE_SHUTDOWN_GRACE
409TORTURE_SUITE="$TORTURE_SUITE"; export TORTURE_SUITE
410TORTURE_TRUST_MAKE="$TORTURE_TRUST_MAKE"; export TORTURE_TRUST_MAKE
411if ! test -e $resdir
412then
413	mkdir -p "$resdir" || :
414fi
415mkdir -p $resdir/$ds
416TORTURE_RESDIR="$resdir/$ds"; export TORTURE_RESDIR
417TORTURE_STOPFILE="$resdir/$ds/STOP.1"; export TORTURE_STOPFILE
418echo Results directory: $resdir/$ds
419echo $scriptname $args
420touch $resdir/$ds/log
421echo $scriptname $args >> $resdir/$ds/log
422echo ${TORTURE_SUITE} > $resdir/$ds/torture_suite
423echo Build directory: `pwd` > $resdir/$ds/testid.txt
424if test -d .git
425then
426	echo Current commit: `git rev-parse HEAD` >> $resdir/$ds/testid.txt
427	echo >> $resdir/$ds/testid.txt
428	echo ' ---' Output of "'"git status"'": >> $resdir/$ds/testid.txt
429	git status >> $resdir/$ds/testid.txt
430	echo >> $resdir/$ds/testid.txt
431	echo >> $resdir/$ds/testid.txt
432	echo ' ---' Output of "'"git diff HEAD"'": >> $resdir/$ds/testid.txt
433	git diff HEAD >> $resdir/$ds/testid.txt
434fi
435___EOF___
436kvm-assign-cpus.sh /sys/devices/system/node > $T/cpuarray.awk
437kvm-get-cpus-script.sh $T/cpuarray.awk $T/dumpbatches.awk
438cat << '___EOF___' >> $T/dumpbatches.awk
439BEGIN {
440	i = 0;
441}
442
443{
444	cf[i] = $1;
445	cpus[i] = $2;
446	i++;
447}
448
449# Dump out the scripting required to run one test batch.
450function dump(first, pastlast, batchnum,  affinitylist)
451{
452	print "echo ----Start batch " batchnum ": `date` | tee -a " rd "log";
453	print "needqemurun="
454	jn=1
455	njitter = 0;
456	split(jitter, ja);
457	if (ja[1] == -1 && ncpus == 0)
458		njitter = 1;
459	else if (ja[1] == -1)
460		njitter = ncpus;
461	else
462		njitter = ja[1];
463	print "TORTURE_JITTER_START=\". jitterstart.sh " njitter " " rd " " dur " " ja[2] " " ja[3] "\"; export TORTURE_JITTER_START";
464	print "TORTURE_JITTER_STOP=\". jitterstop.sh " rd " \"; export TORTURE_JITTER_STOP"
465	for (j = first; j < pastlast; j++) {
466		cpusr[jn] = cpus[j];
467		if (cfrep[cf[j]] == "") {
468			cfr[jn] = cf[j];
469			cfrep[cf[j]] = 1;
470		} else {
471			cfrep[cf[j]]++;
472			cfr[jn] = cf[j] "." cfrep[cf[j]];
473		}
474		builddir=rd cfr[jn] "/build";
475		if (cpusr[jn] > ncpus && ncpus != 0)
476			ovf = "-ovf";
477		else
478			ovf = "";
479		print "echo ", cfr[jn], cpusr[jn] ovf ": Starting build. `date` | tee -a " rd "log";
480		print "mkdir " rd cfr[jn] " || :";
481		print "touch " builddir ".wait";
482		affinitylist = "";
483		if (gotcpus()) {
484			affinitylist = nextcpus(cpusr[jn]);
485		}
486		if (affinitylist ~ /^[0-9,-][0-9,-]*$/)
487			print "export TORTURE_AFFINITY=" affinitylist;
488		else
489			print "export TORTURE_AFFINITY=";
490		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 &"
491		print "echo ", cfr[jn], cpusr[jn] ovf ": Waiting for build to complete. `date` | tee -a " rd "log";
492		print "while test -f " builddir ".wait"
493		print "do"
494		print "\tsleep 1"
495		print "done"
496		print "echo ", cfr[jn], cpusr[jn] ovf ": Build complete. `date` | tee -a " rd "log";
497		jn++;
498	}
499	print "runfiles="
500	for (j = 1; j < jn; j++) {
501		builddir=rd cfr[j] "/build";
502		if (TORTURE_BUILDONLY)
503			print "rm -f " builddir ".ready"
504		else
505			print "mv " builddir ".ready " builddir ".run"
506			print "runfiles=\"$runfiles " builddir ".run\""
507		fi
508		print "if test -f \"" rd cfr[j] "/builtkernel\""
509		print "then"
510		print "\techo ----", cfr[j], cpusr[j] ovf ": Kernel present. `date` | tee -a " rd "log";
511		print "\tneedqemurun=1"
512		print "fi"
513	}
514	if (TORTURE_BUILDONLY && njitter != 0) {
515		njitter = 0;
516		print "echo Build-only run, so suppressing jitter | tee -a " rd "log"
517	}
518	if (TORTURE_BUILDONLY) {
519		print "needqemurun="
520	}
521	print "if test -n \"$needqemurun\""
522	print "then"
523	print "\techo ---- Starting kernels. `date` | tee -a " rd "log";
524	print "\t$TORTURE_JITTER_START";
525	print "\twhile ls $runfiles > /dev/null 2>&1"
526	print "\tdo"
527	print "\t\t:"
528	print "\tdone"
529	print "\t$TORTURE_JITTER_STOP";
530	print "\techo ---- All kernel runs complete. `date` | tee -a " rd "log";
531	print "else"
532	print "\twait"
533	print "\techo ---- No kernel runs. `date` | tee -a " rd "log";
534	print "fi"
535	for (j = 1; j < jn; j++) {
536		print "echo ----", cfr[j], cpusr[j] ovf ": Build/run results: | tee -a " rd "log";
537		print "cat " rd cfr[j]  "/kvm-test-1-run.sh.out | tee -a " rd "log";
538	}
539}
540
541END {
542	njobs = i;
543	nc = ncpus;
544	first = 0;
545	batchnum = 1;
546
547	# Each pass through the following loop considers one test.
548	for (i = 0; i < njobs; i++) {
549		if (ncpus == 0) {
550			# Sequential test specified, each test its own batch.
551			dump(i, i + 1, batchnum);
552			first = i;
553			batchnum++;
554		} else if (nc < cpus[i] && i != 0) {
555			# Out of CPUs, dump out a batch.
556			dump(first, i, batchnum);
557			first = i;
558			nc = ncpus;
559			batchnum++;
560		}
561		# Account for the CPUs needed by the current test.
562		nc -= cpus[i];
563	}
564	# Dump the last batch.
565	if (ncpus != 0)
566		dump(first, i, batchnum);
567}
568___EOF___
569awk < $T/cfgcpu.pack \
570	-v TORTURE_BUILDONLY="$TORTURE_BUILDONLY" \
571	-v CONFIGDIR="$CONFIGFRAG/" \
572	-v KVM="$KVM" \
573	-v ncpus=$cpus \
574	-v jitter="$jitter" \
575	-v rd=$resdir/$ds/ \
576	-v dur=$dur \
577	-v TORTURE_QEMU_ARG="$TORTURE_QEMU_ARG" \
578	-v TORTURE_BOOTARGS="$TORTURE_BOOTARGS" \
579	-f $T/dumpbatches.awk >> $T/script
580echo kvm-end-run-stats.sh "$resdir/$ds" "$starttime" >> $T/script
581
582# Extract the tests and their batches from the script.
583egrep 'Start batch|Starting build\.' $T/script | grep -v ">>" |
584	sed -e 's/:.*$//' -e 's/^echo //' -e 's/-ovf//' |
585	awk '
586	/^----Start/ {
587		batchno = $3;
588		next;
589	}
590	{
591		print batchno, $1, $2
592	}' > $T/batches
593
594# As above, but one line per batch.
595grep -v '^#' $T/batches | awk '
596BEGIN {
597	oldbatch = 1;
598}
599
600{
601	if (oldbatch != $1) {
602		print ++n ". " curbatch;
603		curbatch = "";
604		oldbatch = $1;
605	}
606	curbatch = curbatch " " $2;
607}
608
609END {
610	print ++n ". " curbatch;
611}' > $T/scenarios
612
613if test "$dryrun" = script
614then
615	cat $T/script
616	exit 0
617elif test "$dryrun" = sched
618then
619	# Extract the test run schedule from the script.
620	egrep 'Start batch|Starting build\.' $T/script | grep -v ">>" |
621		sed -e 's/:.*$//' -e 's/^echo //'
622	nbuilds="`grep 'Starting build\.' $T/script |
623		  grep -v ">>" | sed -e 's/:.*$//' -e 's/^echo //' |
624		  awk '{ print $1 }' | grep -v '\.' | wc -l`"
625	echo Total number of builds: $nbuilds
626	nbatches="`grep 'Start batch' $T/script | grep -v ">>" | wc -l`"
627	echo Total number of batches: $nbatches
628	exit 0
629elif test "$dryrun" = batches
630then
631	cat $T/batches
632	exit 0
633elif test "$dryrun" = scenarios
634then
635	cat $T/scenarios
636	exit 0
637else
638	# Not a dryrun.  Record the batches and the number of CPUs, then run the script.
639	bash $T/script
640	ret=$?
641	cp $T/batches $resdir/$ds/batches
642	cp $T/scenarios $resdir/$ds/scenarios
643	echo '#' cpus=$cpus >> $resdir/$ds/batches
644	exit $ret
645fi
646
647# 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
648# Function-graph tracing: ftrace=function_graph ftrace_graph_filter=sched_setaffinity,migration_cpu_stop
649# Also --kconfig "CONFIG_FUNCTION_TRACER=y CONFIG_FUNCTION_GRAPH_TRACER=y"
650# Control buffer size: --bootargs trace_buf_size=3k
651# Get trace-buffer dumps on all oopses: --bootargs ftrace_dump_on_oops
652# Ditto, but dump only the oopsing CPU: --bootargs ftrace_dump_on_oops=orig_cpu
653# Heavy-handed way to also dump on warnings: --bootargs panic_on_warn
654