message: Do a trace-cmd reset when starting tracing to clear old events
diff: @@ -45,6 +45,10 @@ EVENTS+=" -e i915:intel_engine_notify"
  EVENTS+=" -e i915:i915_gem_request_wait_begin"
  EVENTS+=" -e i915:i915_gem_request_wait_end"
  +CMD="trace-cmd reset"
  +echo $CMD
  +$CMD
  +
  echo
  CMD="trace-cmd start -b 2000 -D -i ${EVENTS}"
  echo $CMD
  