message: Add entries / overrun counts for tracing from per_cpu stats files
diff: CMD="trace-cmd stat"
  echo $CMD
  $CMD
  +
  +STAT_FILES=()
  +
  +# /sys/kernel/tracing/per_cpu/cpu0/stats
  +for (( i = 0 ; i <= 256 ; i++ )) ; do
  + FILE="/sys/kernel/tracing/per_cpu/cpu${i}/stats"
  + if [ ! -r ${FILE} ]; then
  + break
  + fi
  +
  + STAT_FILES+=($FILE)
  +done
  +
  +awk '{
  + if ( ( $2 > 0 ) && ( $0 ~ /^(entries\:|overrun\:)/ ) )
  + {
  + printf "%s: %s\n", FILENAME, $0
  + }
  + }' ${STAT_FILES[@]}
  