added timing counter for read requests
added timing counter for read requests

hanw/connectal,hanw/connectal,csail-csg/connectal,8l/connectal,8l/connectal,hanw/connectal,csail-csg/connectal,chenm001/connectal,chenm001/connectal,csail-csg/connectal,8l/connectal,chenm001/connectal,cambridgehackers/connectal,chenm001/connectal,cambridgehackers/connectal,chenm001/connectal,csail-csg/connectal,csail-csg/connectal,8l/connectal,8l/connectal,hanw/connectal,cambridgehackers/connectal,cambridgehackers/connectal,cambridgehackers/connectal,hanw/connectal