kvm-check-branches.sh

  1#!/bin/sh
  2# SPDX-License-Identifier: GPL-2.0+
  3#
  4# Run a group of kvm.sh tests on the specified commits.  This currently
  5# unconditionally does three-minute runs on each scenario in CFLIST,
  6# taking advantage of all available CPUs and trusting the "make" utility.
  7# In the short term, adjustments can be made by editing this script and
  8# CFLIST.  If some adjustments appear to have ongoing value, this script
  9# might grow some command-line arguments.
 10#
 11# Usage: kvm-check-branches.sh commit1 commit2..commit3 commit4 ...
 12#
 13# This script considers its arguments one at a time.  If more elaborate
 14# specification of commits is needed, please use "git rev-list" to
 15# produce something that this simple script can understand.  The reason
 16# for retaining the simplicity is that it allows the user to more easily
 17# see which commit came from which branch.
 18#
 19# This script creates a yyyy.mm.dd-hh.mm.ss-group entry in the "res"
 20# directory.  The calls to kvm.sh create the usual entries, but this script
 21# moves them under the yyyy.mm.dd-hh.mm.ss-group entry, each in its own
 22# directory numbered in run order, that is, "0001", "0002", and so on.
 23# For successful runs, the large build artifacts are removed.  Doing this
 24# reduces the disk space required by about two orders of magnitude for
 25# successful runs.
 26#
 27# Copyright (C) Facebook, 2020
 28#
 29# Authors: Paul E. McKenney <paulmck@kernel.org>
 30
 31if ! git status > /dev/null 2>&1
 32then
 33	echo '!!!' This script needs to run in a git archive. 1>&2
 34	echo '!!!' Giving up. 1>&2
 35	exit 1
 36fi
 37
 38# Remember where we started so that we can get back at the end.
 39curcommit="`git status | head -1 | awk '{ print $NF }'`"
 40
 41nfail=0
 42ntry=0
 43resdir="tools/testing/selftests/rcutorture/res"
 44ds="`date +%Y.%m.%d-%H.%M.%S`-group"
 45if ! test -e $resdir
 46then
 47	mkdir $resdir || :
 48fi
 49mkdir $resdir/$ds
 50echo Results directory: $resdir/$ds
 51
 52RCUTORTURE="`pwd`/tools/testing/selftests/rcutorture"; export RCUTORTURE
 53PATH=${RCUTORTURE}/bin:$PATH; export PATH
 54. functions.sh
 55echo Using all `identify_qemu_vcpus` CPUs.
 56
 57# Each pass through this loop does one command-line argument.
 58for gitbr in $@
 59do
 60	echo ' --- git branch ' $gitbr
 61
 62	# Each pass through this loop tests one commit.
 63	for i in `git rev-list "$gitbr"`
 64	do
 65		ntry=`expr $ntry + 1`
 66		idir=`awk -v ntry="$ntry" 'END { printf "%04d", ntry; }' < /dev/null`
 67		echo ' --- commit ' $i from branch $gitbr
 68		date
 69		mkdir $resdir/$ds/$idir
 70		echo $gitbr > $resdir/$ds/$idir/gitbr
 71		echo $i >> $resdir/$ds/$idir/gitbr
 72
 73		# Test the specified commit.
 74		git checkout $i > $resdir/$ds/$idir/git-checkout.out 2>&1
 75		echo git checkout return code: $? "(Commit $ntry: $i)"
 76		kvm.sh --allcpus --duration 3 --trust-make --datestamp "$ds/$idir" > $resdir/$ds/$idir/kvm.sh.out 2>&1
 77		ret=$?
 78		echo kvm.sh return code $ret for commit $i from branch $gitbr
 79		echo Run results: $resdir/$ds/$idir
 80		if test "$ret" -ne 0
 81		then
 82			# Failure, so leave all evidence intact.
 83			nfail=`expr $nfail + 1`
 84		else
 85			# Success, so remove large files to save about 1GB.
 86			( cd $resdir/$ds/$idir/$rrd; rm -f */vmlinux */bzImage */System.map */Module.symvers )
 87		fi
 88	done
 89done
 90date
 91
 92# Go back to the original commit.
 93git checkout "$curcommit"
 94
 95if test $nfail -ne 0
 96then
 97	echo '!!! ' $nfail failures in $ntry 'runs!!!'
 98	exit 1
 99else
100	echo No failures in $ntry runs.
101	exit 0
102fi