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rcutorture: Avoid torture.sh compressing identical files

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Currently, torture.sh will compress the vmlinux files for KASAN and
KCSAN runs.  But it will compress all of the files, including those
copied verbatim by the kvm-again.sh script.  Compression takes around ten
minutes, so this is not a good thing.  This commit therefore compresses
only one of a given set of identical vmlinux files, and then hard-links
it to the directories produced by kvm-again.sh.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2022-08-30 11:52:13 -07:00
parent dfabd42099
commit cb0982e205
1 changed files with 22 additions and 1 deletions
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23
tools/testing/selftests/rcutorture/bin/torture.sh
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@ -536,7 +536,10 @@ if test -n "$tdir" && test $compress_concurrency -gt 0
then
# KASAN vmlinux files can approach 1GB in size, so compress them.
echo Looking for K[AC]SAN files to compress: `date` > "$tdir/log-xz" 2>&1
find "$tdir" -type d -name '*-k[ac]san' -print > $T/xz-todo
find "$tdir" -type d -name '*-k[ac]san' -print > $T/xz-todo-all
find "$tdir" -type f -name 're-run' -print | sed -e 's,/re-run,,' |
grep -e '-k[ac]san$' > $T/xz-todo-copy
sort $T/xz-todo-all $T/xz-todo-copy | uniq -u > $T/xz-todo
ncompresses=0
batchno=1
if test -s $T/xz-todo
@ -568,6 +571,24 @@ then
echo Waiting for final batch $batchno of $ncompresses compressions `date` | tee -a "$tdir/log-xz" | tee -a $T/log
fi
wait
if test -s $T/xz-todo-copy
then
# The trick here is that we need corresponding
# vmlinux files from corresponding scenarios.
echo Linking vmlinux.xz files to re-use scenarios `date` | tee -a "$tdir/log-xz" | tee -a $T/log
dirstash="`pwd`"
for i in `cat $T/xz-todo-copy`
do
cd $i
find . -name vmlinux -print > $T/xz-todo-copy-vmlinux
for v in `cat $T/xz-todo-copy-vmlinux`
do
rm -f "$v"
cp -l `cat $i/re-run`/"$i/$v".xz "`dirname "$v"`"
done
cd "$dirstash"
done
fi
echo Size after compressing $n2compress files: `du -sh $tdir | awk '{ print $1 }'` `date` 2>&1 | tee -a "$tdir/log-xz" | tee -a $T/log
echo Total duration `get_starttime_duration $starttime`. | tee -a $T/log
else