This makes sure the the first build starts from a clean state. Otherwise
one could have the first build affected by any leftover state from
a previous build.

This also leaves a working state behind after the final build.

Signed-off-by: Peter Kjellerstedt <peter.kjellerst...@axis.com>
---
 scripts/contrib/bb-perf/bb-matrix.sh | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/scripts/contrib/bb-perf/bb-matrix.sh 
b/scripts/contrib/bb-perf/bb-matrix.sh
index 37721fe..1064565 100755
--- a/scripts/contrib/bb-perf/bb-matrix.sh
+++ b/scripts/contrib/bb-perf/bb-matrix.sh
@@ -63,6 +63,10 @@ for BB in $BB_RANGE; do
                date
                echo "BB=$BB PM=$PM Logging to $BB_LOG"
 
+               echo -n "  Preparing the work directory... "
+               rm -rf pseudodone tmp sstate-cache tmp-eglibc &> /dev/null
+               echo "done"
+
                # Export the variables under test and run the bitbake command
                # Strip any leading zeroes before passing to bitbake
                export BB_NUMBER_THREADS=$(echo $BB | sed 's/^0*//')
@@ -70,12 +74,6 @@ for BB in $BB_RANGE; do
                /usr/bin/time -f "$BB $PM $TIME_STR" -a -o $RUNTIME_LOG $BB_CMD 
&> $BB_LOG
 
                echo "  $(tail -n1 $RUNTIME_LOG)"
-               echo -n "  Cleaning up..."
-               mv tmp/buildstats $RUNDIR/$BB-$PM-buildstats
-               rm -f pseudodone &> /dev/null
-               rm -rf tmp &> /dev/null
-               rm -rf sstate-cache &> /dev/null
-               rm -rf tmp-eglibc &> /dev/null
-               echo "done"
+               cp -a tmp/buildstats $RUNDIR/$BB-$PM-buildstats
        done
 done
-- 
1.8.2.1

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