Further work on a generic benchmarking framework.

make important argument mandatory, do a better job of collecting results.

tools/auto-qa

@@ -490,6 +490,10 @@ do
 	    _sudo ./bench $BENCH_PASSES `id -nu && id -ng` \
 			|| _fail "	    !!! failed to run benchmarks"
 
+	    _log ""
+	    _log "	    *** send results mail"
+	    mail -s "XFS QA benchmark results" $EMAIL < $ROOT/bench.out 2>&1
+	
 	    new_state="done"
 	    ;;