From d0b2f91bede3bd5e3d24dd6803e56eee959c1797 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Thu, 20 Oct 2016 00:10:27 -0300
Subject: Linux-libre 4.8.2-gnu
---
.../testing/selftests/rcutorture/bin/functions.sh | 12 ++++----
.../selftests/rcutorture/bin/kvm-test-1-run.sh | 34 +++++++++++++++++-----
tools/testing/selftests/rcutorture/bin/kvm.sh | 2 +-
.../selftests/rcutorture/bin/parse-console.sh | 7 ++++-
tools/testing/selftests/rcutorture/doc/initrd.txt | 22 ++++++++++++++
5 files changed, 60 insertions(+), 17 deletions(-)
(limited to 'tools/testing/selftests/rcutorture')
diff --git a/tools/testing/selftests/rcutorture/bin/functions.sh b/tools/testing/selftests/rcutorture/bin/functions.sh
index b325470c0..1426a9b97 100644
--- a/tools/testing/selftests/rcutorture/bin/functions.sh
+++ b/tools/testing/selftests/rcutorture/bin/functions.sh
@@ -99,8 +99,9 @@ configfrag_hotplug_cpu () {
# identify_boot_image qemu-cmd
#
# Returns the relative path to the kernel build image. This will be
-# arch/<arch>/boot/bzImage unless overridden with the TORTURE_BOOT_IMAGE
-# environment variable.
+# arch/<arch>/boot/bzImage or vmlinux if bzImage is not a target for the
+# architecture, unless overridden with the TORTURE_BOOT_IMAGE environment
+# variable.
identify_boot_image () {
if test -n "$TORTURE_BOOT_IMAGE"
then
@@ -110,11 +111,8 @@ identify_boot_image () {
qemu-system-x86_64|qemu-system-i386)
echo arch/x86/boot/bzImage
;;
- qemu-system-ppc64)
- echo arch/powerpc/boot/bzImage
- ;;
*)
- echo ""
+ echo vmlinux
;;
esac
fi
@@ -175,7 +173,7 @@ identify_qemu_args () {
qemu-system-x86_64|qemu-system-i386)
;;
qemu-system-ppc64)
- echo -enable-kvm -M pseries -cpu POWER7 -nodefaults
+ echo -enable-kvm -M pseries -nodefaults
echo -device spapr-vscsi
if test -n "$TORTURE_QEMU_INTERACTIVE" -a -n "$TORTURE_QEMU_MAC"
then
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh b/tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh
index 4109f306d..ea6e373ed 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh
@@ -8,9 +8,9 @@
#
# Usage: kvm-test-1-run.sh config builddir resdir seconds qemu-args boot_args
#
-# qemu-args defaults to "-enable-kvm -soundhw pcspk -nographic", along with
-# arguments specifying the number of CPUs and other
-# options generated from the underlying CPU architecture.
+# qemu-args defaults to "-enable-kvm -nographic", along with arguments
+# specifying the number of CPUs and other options
+# generated from the underlying CPU architecture.
# boot_args defaults to value returned by the per_version_boot_params
# shell function.
#
@@ -96,7 +96,8 @@ if test "$base_resdir" != "$resdir" -a -f $base_resdir/bzImage -a -f $base_resdi
then
# Rerunning previous test, so use that test's kernel.
QEMU="`identify_qemu $base_resdir/vmlinux`"
- KERNEL=$base_resdir/bzImage
+ BOOT_IMAGE="`identify_boot_image $QEMU`"
+ KERNEL=$base_resdir/${BOOT_IMAGE##*/} # use the last component of ${BOOT_IMAGE}
ln -s $base_resdir/Make*.out $resdir # for kvm-recheck.sh
ln -s $base_resdir/.config $resdir # for kvm-recheck.sh
elif kvm-build.sh $config_template $builddir $T
@@ -110,7 +111,7 @@ then
if test -n "$BOOT_IMAGE"
then
cp $builddir/$BOOT_IMAGE $resdir
- KERNEL=$resdir/bzImage
+ KERNEL=$resdir/${BOOT_IMAGE##*/}
else
echo No identifiable boot image, not running KVM, see $resdir.
echo Do the torture scripts know about your architecture?
@@ -147,7 +148,7 @@ then
fi
# Generate -smp qemu argument.
-qemu_args="-enable-kvm -soundhw pcspk -nographic $qemu_args"
+qemu_args="-enable-kvm -nographic $qemu_args"
cpu_count=`configNR_CPUS.sh $config_template`
cpu_count=`configfrag_boot_cpus "$boot_args" "$config_template" "$cpu_count"`
vcpus=`identify_qemu_vcpus`
@@ -229,6 +230,7 @@ fi
if test $commandcompleted -eq 0 -a -n "$qemu_pid"
then
echo Grace period for qemu job at pid $qemu_pid
+ oldline="`tail $resdir/console.log`"
while :
do
kruntime=`awk 'BEGIN { print systime() - '"$kstarttime"' }' < /dev/null`
@@ -238,13 +240,29 @@ then
else
break
fi
- if test $kruntime -ge $((seconds + $TORTURE_SHUTDOWN_GRACE))
+ must_continue=no
+ newline="`tail $resdir/console.log`"
+ if test "$newline" != "$oldline" && echo $newline | grep -q ' [0-9]\+us : '
+ then
+ must_continue=yes
+ fi
+ last_ts="`tail $resdir/console.log | grep '^\[ *[0-9]\+\.[0-9]\+]' | tail -1 | sed -e 's/^\[ *//' -e 's/\..*$//'`"
+ if test -z "last_ts"
+ then
+ last_ts=0
+ fi
+ if test "$newline" != "$oldline" -a "$last_ts" -lt $((seconds + $TORTURE_SHUTDOWN_GRACE))
+ then
+ must_continue=yes
+ fi
+ if test $must_continue = no -a $kruntime -ge $((seconds + $TORTURE_SHUTDOWN_GRACE))
then
echo "!!! PID $qemu_pid hung at $kruntime vs. $seconds seconds" >> $resdir/Warnings 2>&1
kill -KILL $qemu_pid
break
fi
- sleep 1
+ oldline=$newline
+ sleep 10
done
elif test -z "$qemu_pid"
then
diff --git a/tools/testing/selftests/rcutorture/bin/kvm.sh b/tools/testing/selftests/rcutorture/bin/kvm.sh
index 0d5981458..0aed965f0 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm.sh
@@ -48,7 +48,7 @@ resdir=""
configs=""
cpus=0
ds=`date +%Y.%m.%d-%H:%M:%S`
-jitter=0
+jitter="-1"
. functions.sh
diff --git a/tools/testing/selftests/rcutorture/bin/parse-console.sh b/tools/testing/selftests/rcutorture/bin/parse-console.sh
index 5eb49b7f8..08aa7d50a 100755
--- a/tools/testing/selftests/rcutorture/bin/parse-console.sh
+++ b/tools/testing/selftests/rcutorture/bin/parse-console.sh
@@ -33,7 +33,7 @@ if grep -Pq '\x00' < $file
then
print_warning Console output contains nul bytes, old qemu still running?
fi
-egrep 'Badness|WARNING:|Warn|BUG|===========|Call Trace:|Oops:|detected stalls on CPUs/tasks:|self-detected stall on CPU|Stall ended before state dump start|\?\?\? Writer stall state' < $file | grep -v 'ODEBUG: ' | grep -v 'Warning: unable to open an initial console' > $1.diags
+egrep 'Badness|WARNING:|Warn|BUG|===========|Call Trace:|Oops:|detected stalls on CPUs/tasks:|self-detected stall on CPU|Stall ended before state dump start|\?\?\? Writer stall state|rcu_.*kthread starved for' < $file | grep -v 'ODEBUG: ' | grep -v 'Warning: unable to open an initial console' > $1.diags
if test -s $1.diags
then
print_warning Assertion failure in $file $title
@@ -69,6 +69,11 @@ then
then
summary="$summary Stalls: $n_stalls"
fi
+ n_starves=`grep -c 'rcu_.*kthread starved for' $1`
+ if test "$n_starves" -ne 0
+ then
+ summary="$summary Starves: $n_starves"
+ fi
print_warning Summary: $summary
else
rm $1.diags
diff --git a/tools/testing/selftests/rcutorture/doc/initrd.txt b/tools/testing/selftests/rcutorture/doc/initrd.txt
index 4170e714f..833f826d6 100644
--- a/tools/testing/selftests/rcutorture/doc/initrd.txt
+++ b/tools/testing/selftests/rcutorture/doc/initrd.txt
@@ -13,6 +13,22 @@ cd initrd
cpio -id < /tmp/initrd.img.zcat
------------------------------------------------------------------------
+Another way to create an initramfs image is using "dracut"[1], which is
+available on many distros, however the initramfs dracut generates is a cpio
+archive with another cpio archive in it, so an extra step is needed to create
+the initrd directory hierarchy.
+
+Here are the commands to create a initrd directory for rcutorture using
+dracut:
+
+------------------------------------------------------------------------
+dracut --no-hostonly --no-hostonly-cmdline --module "base bash shutdown" /tmp/initramfs.img
+cd tools/testing/selftests/rcutorture
+mkdir initrd
+cd initrd
+/usr/lib/dracut/skipcpio /tmp/initramfs.img | zcat | cpio -id < /tmp/initramfs.img
+------------------------------------------------------------------------
+
Interestingly enough, if you are running rcutorture, you don't really
need userspace in many cases. Running without userspace has the
advantage of allowing you to test your kernel independently of the
@@ -89,3 +105,9 @@ while :
do
sleep 10
done
+------------------------------------------------------------------------
+
+References:
+[1]: https://dracut.wiki.kernel.org/index.php/Main_Page
+[2]: http://blog.elastocloud.org/2015/06/rapid-linux-kernel-devtest-with-qemu.html
+[3]: https://www.centos.org/forums/viewtopic.php?t=51621
--
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