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#!/bin/sh
# flush memory with use-twice page cache reads
# lru_lock coverage
# 2060819456 activate_page
# 154664490 ____pagevec_lru_add
# 131308246 move_active_pages_to_lru
# 65654100 shrink_active_list
# 65510367 shrink_inactive_list
# zone->lock coverage
# 33637385 free_pcppages_bulk
# 33650227 rmqueue_bulk
. ./hw_vars
for i in `seq 1 $nr_task`
do
create_sparse_file $SPARSE_FILE-$i $((ROTATE_BYTES / nr_task))
timeout --foreground -s INT ${runtime:-600} dd bs=4k if=$SPARSE_FILE-$i of=/dev/null > $TMPFS_MNT/dd-output-1-$i 2>&1 &
timeout --foreground -s INT ${runtime:-600} dd bs=4k if=$SPARSE_FILE-$i of=/dev/null > $TMPFS_MNT/dd-output-2-$i 2>&1 &
done
wait
sleep 1
for file in $TMPFS_MNT/dd-output-*
do
[ -s "$file" ] || {
echo "dd output file empty: $file" >&2
}
cat $file
rm $file
done
rm `seq -f $SPARSE_FILE-%g 1 $nr_task`
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