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tools/memory-model: Add scripts to check github litmus tests

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The https://github.com/paulmckrcu/litmus repository contains a large
number of C-language litmus tests that include "Result:" comments
predicting the verification result.  This commit adds a number of scripts
that run tests on these litmus tests:

checkghlitmus.sh:
	Runs all litmus tests in the https://github.com/paulmckrcu/litmus
        archive that are C-language and that have "Result:" comment lines
	documenting expected results, comparing the actual results to
	those expected.  Clones the repository if it has not already
	been cloned into the "tools/memory-model/litmus" directory.

initlitmushist.sh
	Run all litmus tests having no more than the specified number
	of processes given a specified timeout, recording the results in
	.litmus.out files.  Clones the repository if it has not already
	been cloned into the "tools/memory-model/litmus" directory.

newlitmushist.sh
	For all new or updated litmus tests having no more than the
	specified number of processes given a specified timeout, run
	and record the results in .litmus.out files.

checklitmushist.sh
	Run all litmus tests having .litmus.out files from previous
	initlitmushist.sh or newlitmushist.sh runs, comparing the
	herd output to that of the original runs.

The above scripts will run litmus tests concurrently, by default with
one job per available CPU.  Giving any of these scripts the --help
argument will cause them to print usage information.

This commit also adds a number of helper scripts that are not intended
to be invoked from the command line:

cmplitmushist.sh: Compare the output of two different runs of the same
	litmus test.

judgelitmus.sh: Compare the output of a litmus test to its "Result:"
	comment line.

parseargs.sh: Parse command-line arguments.

runlitmushist.sh: Run the litmus tests whose pathnames are provided one
	per line on standard input.

While in the area, this commit also makes the existing checklitmus.sh
and checkalllitmus.sh scripts use parseargs.sh in order to provide a
bit of uniformity.  In addition, per-litmus-test status output is directed
to stdout, while end-of-test summary information is directed to stderr.
Finally, the error flag standardizes on "!!!" to assist those familiar
with rcutorture output.

The defaults for the parseargs.sh arguments may be overridden by using
environment variables: LKMM_DESTDIR for --destdir, LKMM_HERD_OPTIONS
for --herdoptions, LKMM_JOBS for --jobs, LKMM_PROCS for --procs, and
LKMM_TIMEOUT for --timeout.

[ paulmck: History-check summary-line changes per Alan Stern feedback. ]
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: akiyks@gmail.com
Cc: boqun.feng@gmail.com
Cc: dhowells@redhat.com
Cc: j.alglave@ucl.ac.uk
Cc: linux-arch@vger.kernel.org
Cc: luc.maranget@inria.fr
Cc: npiggin@gmail.com
Cc: parri.andrea@gmail.com
Cc: stern@rowland.harvard.edu
Cc: will.deacon@arm.com
Link: http://lkml.kernel.org/r/20181203230451.28921-2-paulmck@linux.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Paul E. McKenney
2018-12-03 15:04:50 -08:00
committed by Ingo Molnar
parent 5b735eb1ce
commit b02eb5b096
13 changed files with 739 additions and 93 deletions
Download Patch File Download Diff File Expand all files Collapse all files

126
tools/memory-model/scripts/parseargs.sh Normal file
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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0+
#
# the corresponding .litmus.out file, and does not judge the result.
#
# . scripts/parseargs.sh
#
# Include into other Linux kernel tools/memory-model scripts.
#
# Copyright IBM Corporation, 2018
#
# Author: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
T=/tmp/parseargs.sh.$$
mkdir $T
# Initialize one parameter: initparam name default
initparam () {
echo if test -z '"$'$1'"' > $T/s
echo then >> $T/s
echo $1='"'$2'"' >> $T/s
echo export $1 >> $T/s
echo fi >> $T/s
echo $1_DEF='$'$1 >> $T/s
. $T/s
}
initparam LKMM_DESTDIR "."
initparam LKMM_HERD_OPTIONS "-conf linux-kernel.cfg"
initparam LKMM_JOBS `getconf _NPROCESSORS_ONLN`
initparam LKMM_PROCS "3"
initparam LKMM_TIMEOUT "1m"
scriptname=$0
usagehelp () {
echo "Usage $scriptname [ arguments ]"
echo " --destdir path (place for .litmus.out, default by .litmus)"
echo " --herdopts -conf linux-kernel.cfg ..."
echo " --jobs N (number of jobs, default one per CPU)"
echo " --procs N (litmus tests with at most this many processes)"
echo " --timeout N (herd7 timeout (e.g., 10s, 1m, 2hr, 1d, '')"
echo "Defaults: --destdir '$LKMM_DESTDIR_DEF' --herdopts '$LKMM_HERD_OPTIONS_DEF' --jobs '$LKMM_JOBS_DEF' --procs '$LKMM_PROCS_DEF' --timeout '$LKMM_TIMEOUT_DEF'"
exit 1
}
usage () {
usagehelp 1>&2
}
# checkarg --argname argtype $# arg mustmatch cannotmatch
checkarg () {
if test $3 -le 1
then
echo $1 needs argument $2 matching \"$5\"
usage
fi
if echo "$4" | grep -q -e "$5"
then
:
else
echo $1 $2 \"$4\" must match \"$5\"
usage
fi
if echo "$4" | grep -q -e "$6"
then
echo $1 $2 \"$4\" must not match \"$6\"
usage
fi
}
while test $# -gt 0
do
case "$1" in
--destdir)
checkarg --destdir "(path to directory)" "$#" "$2" '.\+' '^--'
LKMM_DESTDIR="$2"
mkdir $LKMM_DESTDIR > /dev/null 2>&1
if ! test -e "$LKMM_DESTDIR"
then
echo "Cannot create directory --destdir '$LKMM_DESTDIR'"
usage
fi
if test -d "$LKMM_DESTDIR" -a -w "$LKMM_DESTDIR" -a -x "$LKMM_DESTDIR"
then
:
else
echo "Directory --destdir '$LKMM_DESTDIR' insufficient permissions to create files"
usage
fi
shift
;;
--herdopts|--herdopt)
checkarg --destdir "(herd options)" "$#" "$2" '.*' '^--'
LKMM_HERD_OPTIONS="$2"
shift
;;
--jobs|--job)
checkarg --jobs "(number)" "$#" "$2" '^[0-9]\+$' '^--'
LKMM_JOBS="$2"
shift
;;
--procs|--proc)
checkarg --procs "(number)" "$#" "$2" '^[0-9]\+$' '^--'
LKMM_PROCS="$2"
shift
;;
--timeout)
checkarg --timeout "(timeout spec)" "$#" "$2" '^\([0-9]\+[smhd]\?\|\)$' '^--'
LKMM_TIMEOUT="$2"
shift
;;
*)
echo Unknown argument $1
usage
;;
esac
shift
done
if test -z "$LKMM_TIMEOUT"
then
LKMM_TIMEOUT_CMD=""; export LKMM_TIMEOUT_CMD
else
LKMM_TIMEOUT_CMD="timeout $LKMM_TIMEOUT"; export LKMM_TIMEOUT_CMD
fi
rm -rf $T