mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2025-01-15 17:07:07 +07:00
b22eb7cefb
On some kernels, concurrent calls to the lscpu command result in severe slowdowns. For example, on v4.16, a single lscpu invocation takes about two milliseconds, four concurrent invocations more than two seconds, and 16 concurrent invocations more than 20 seconds. Given that the only goal is to learn the number of CPUs, invoking lscpu but once suffices. This commit therefore invokes lscpu early in kvm.sh execution, setting the initial value of the TORTURE_ALLOTED_CPUS environment variable. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
252 lines
7.7 KiB
Bash
Executable File
252 lines
7.7 KiB
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0+
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#
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# Run a kvm-based test of the specified tree on the specified configs.
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# Fully automated run and error checking, no graphics console.
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#
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# Execute this in the source tree. Do not run it as a background task
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# because qemu does not seem to like that much.
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#
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# Usage: kvm-test-1-run.sh config builddir resdir seconds qemu-args boot_args
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#
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# qemu-args defaults to "-enable-kvm -nographic", along with arguments
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# specifying the number of CPUs and other options
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# generated from the underlying CPU architecture.
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# boot_args defaults to value returned by the per_version_boot_params
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# shell function.
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#
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# Anything you specify for either qemu-args or boot_args is appended to
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# the default values. The "-smp" value is deduced from the contents of
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# the config fragment.
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#
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# More sophisticated argument parsing is clearly needed.
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#
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# Copyright (C) IBM Corporation, 2011
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#
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# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
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T=${TMPDIR-/tmp}/kvm-test-1-run.sh.$$
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trap 'rm -rf $T' 0
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mkdir $T
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. functions.sh
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. $CONFIGFRAG/ver_functions.sh
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config_template=${1}
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config_dir=`echo $config_template | sed -e 's,/[^/]*$,,'`
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title=`echo $config_template | sed -e 's/^.*\///'`
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builddir=${2}
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resdir=${3}
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if test -z "$resdir" -o ! -d "$resdir" -o ! -w "$resdir"
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then
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echo "kvm-test-1-run.sh :$resdir: Not a writable directory, cannot store results into it"
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exit 1
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fi
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echo ' ---' `date`: Starting build
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echo ' ---' Kconfig fragment at: $config_template >> $resdir/log
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touch $resdir/ConfigFragment.input $resdir/ConfigFragment
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if test -r "$config_dir/CFcommon"
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then
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echo " --- $config_dir/CFcommon" >> $resdir/ConfigFragment.input
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cat < $config_dir/CFcommon >> $resdir/ConfigFragment.input
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config_override.sh $config_dir/CFcommon $config_template > $T/Kc1
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grep '#CHECK#' $config_dir/CFcommon >> $resdir/ConfigFragment
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else
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cp $config_template $T/Kc1
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fi
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echo " --- $config_template" >> $resdir/ConfigFragment.input
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cat $config_template >> $resdir/ConfigFragment.input
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grep '#CHECK#' $config_template >> $resdir/ConfigFragment
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if test -n "$TORTURE_KCONFIG_ARG"
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then
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echo $TORTURE_KCONFIG_ARG | tr -s " " "\012" > $T/cmdline
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echo " --- --kconfig argument" >> $resdir/ConfigFragment.input
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cat $T/cmdline >> $resdir/ConfigFragment.input
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config_override.sh $T/Kc1 $T/cmdline > $T/Kc2
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# Note that "#CHECK#" is not permitted on commandline.
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else
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cp $T/Kc1 $T/Kc2
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fi
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cat $T/Kc2 >> $resdir/ConfigFragment
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base_resdir=`echo $resdir | sed -e 's/\.[0-9]\+$//'`
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if test "$base_resdir" != "$resdir" -a -f $base_resdir/bzImage -a -f $base_resdir/vmlinux
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then
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# Rerunning previous test, so use that test's kernel.
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QEMU="`identify_qemu $base_resdir/vmlinux`"
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BOOT_IMAGE="`identify_boot_image $QEMU`"
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KERNEL=$base_resdir/${BOOT_IMAGE##*/} # use the last component of ${BOOT_IMAGE}
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ln -s $base_resdir/Make*.out $resdir # for kvm-recheck.sh
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ln -s $base_resdir/.config $resdir # for kvm-recheck.sh
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# Arch-independent indicator
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touch $resdir/builtkernel
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elif kvm-build.sh $T/Kc2 $resdir
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then
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# Had to build a kernel for this test.
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QEMU="`identify_qemu vmlinux`"
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BOOT_IMAGE="`identify_boot_image $QEMU`"
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cp vmlinux $resdir
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cp .config $resdir
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cp Module.symvers $resdir > /dev/null || :
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cp System.map $resdir > /dev/null || :
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if test -n "$BOOT_IMAGE"
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then
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cp $BOOT_IMAGE $resdir
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KERNEL=$resdir/${BOOT_IMAGE##*/}
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# Arch-independent indicator
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touch $resdir/builtkernel
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else
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echo No identifiable boot image, not running KVM, see $resdir.
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echo Do the torture scripts know about your architecture?
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fi
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parse-build.sh $resdir/Make.out $title
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else
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# Build failed.
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cp .config $resdir || :
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echo Build failed, not running KVM, see $resdir.
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if test -f $builddir.wait
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then
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mv $builddir.wait $builddir.ready
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fi
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exit 1
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fi
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if test -f $builddir.wait
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then
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mv $builddir.wait $builddir.ready
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fi
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while test -f $builddir.ready
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do
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sleep 1
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done
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seconds=$4
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qemu_args=$5
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boot_args=$6
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cd $KVM
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kstarttime=`gawk 'BEGIN { print systime() }' < /dev/null`
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if test -z "$TORTURE_BUILDONLY"
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then
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echo ' ---' `date`: Starting kernel
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fi
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# Generate -smp qemu argument.
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qemu_args="-enable-kvm -nographic $qemu_args"
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cpu_count=`configNR_CPUS.sh $resdir/ConfigFragment`
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cpu_count=`configfrag_boot_cpus "$boot_args" "$config_template" "$cpu_count"`
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if test "$cpu_count" -gt "$TORTURE_ALLOTED_CPUS"
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then
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echo CPU count limited from $cpu_count to $TORTURE_ALLOTED_CPUS | tee -a $resdir/Warnings
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cpu_count=$TORTURE_ALLOTED_CPUS
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fi
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qemu_args="`specify_qemu_cpus "$QEMU" "$qemu_args" "$cpu_count"`"
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# Generate architecture-specific and interaction-specific qemu arguments
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qemu_args="$qemu_args `identify_qemu_args "$QEMU" "$resdir/console.log"`"
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# Generate qemu -append arguments
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qemu_append="`identify_qemu_append "$QEMU"`"
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# Pull in Kconfig-fragment boot parameters
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boot_args="`configfrag_boot_params "$boot_args" "$config_template"`"
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# Generate kernel-version-specific boot parameters
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boot_args="`per_version_boot_params "$boot_args" $resdir/.config $seconds`"
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if test -n "$TORTURE_BUILDONLY"
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then
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echo Build-only run specified, boot/test omitted.
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touch $resdir/buildonly
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exit 0
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fi
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echo "NOTE: $QEMU either did not run or was interactive" > $resdir/console.log
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echo $QEMU $qemu_args -m $TORTURE_QEMU_MEM -kernel $KERNEL -append \"$qemu_append $boot_args\" > $resdir/qemu-cmd
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( $QEMU $qemu_args -m $TORTURE_QEMU_MEM -kernel $KERNEL -append "$qemu_append $boot_args" > $resdir/qemu-output 2>&1 & echo $! > $resdir/qemu_pid; wait `cat $resdir/qemu_pid`; echo $? > $resdir/qemu-retval ) &
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commandcompleted=0
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sleep 10 # Give qemu's pid a chance to reach the file
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if test -s "$resdir/qemu_pid"
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then
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qemu_pid=`cat "$resdir/qemu_pid"`
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echo Monitoring qemu job at pid $qemu_pid
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else
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qemu_pid=""
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echo Monitoring qemu job at yet-as-unknown pid
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fi
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while :
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do
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if test -z "$qemu_pid" -a -s "$resdir/qemu_pid"
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then
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qemu_pid=`cat "$resdir/qemu_pid"`
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fi
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kruntime=`gawk 'BEGIN { print systime() - '"$kstarttime"' }' < /dev/null`
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if test -z "$qemu_pid" || kill -0 "$qemu_pid" > /dev/null 2>&1
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then
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if test $kruntime -ge $seconds
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then
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break;
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fi
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sleep 1
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else
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commandcompleted=1
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if test $kruntime -lt $seconds
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then
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echo Completed in $kruntime vs. $seconds >> $resdir/Warnings 2>&1
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grep "^(qemu) qemu:" $resdir/kvm-test-1-run.sh.out >> $resdir/Warnings 2>&1
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killpid="`sed -n "s/^(qemu) qemu: terminating on signal [0-9]* from pid \([0-9]*\).*$/\1/p" $resdir/Warnings`"
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if test -n "$killpid"
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then
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echo "ps -fp $killpid" >> $resdir/Warnings 2>&1
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ps -fp $killpid >> $resdir/Warnings 2>&1
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fi
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else
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echo ' ---' `date`: "Kernel done"
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fi
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break
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fi
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done
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if test -z "$qemu_pid" -a -s "$resdir/qemu_pid"
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then
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qemu_pid=`cat "$resdir/qemu_pid"`
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fi
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if test $commandcompleted -eq 0 -a -n "$qemu_pid"
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then
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echo Grace period for qemu job at pid $qemu_pid
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oldline="`tail $resdir/console.log`"
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while :
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do
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kruntime=`gawk 'BEGIN { print systime() - '"$kstarttime"' }' < /dev/null`
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if kill -0 $qemu_pid > /dev/null 2>&1
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then
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:
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else
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break
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fi
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must_continue=no
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newline="`tail $resdir/console.log`"
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if test "$newline" != "$oldline" && echo $newline | grep -q ' [0-9]\+us : '
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then
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must_continue=yes
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fi
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last_ts="`tail $resdir/console.log | grep '^\[ *[0-9]\+\.[0-9]\+]' | tail -1 | sed -e 's/^\[ *//' -e 's/\..*$//'`"
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if test -z "$last_ts"
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then
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last_ts=0
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fi
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if test "$newline" != "$oldline" -a "$last_ts" -lt $((seconds + $TORTURE_SHUTDOWN_GRACE))
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then
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must_continue=yes
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fi
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if test $must_continue = no -a $kruntime -ge $((seconds + $TORTURE_SHUTDOWN_GRACE))
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then
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echo "!!! PID $qemu_pid hung at $kruntime vs. $seconds seconds" >> $resdir/Warnings 2>&1
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kill -KILL $qemu_pid
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break
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fi
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oldline=$newline
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sleep 10
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done
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elif test -z "$qemu_pid"
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then
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echo Unknown PID, cannot kill qemu command
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fi
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parse-console.sh $resdir/console.log $title
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