Added some logging to the DAG execution
Added some logging to the DAG execution

amplab/keystone,tomerk/keystone,dongjoon-hyun/keystone,tomerk/keystone,amplab/keystone,amplab/keystone,kcompher/keystone,kcompher/keystone,javadba/keystone,dongjoon-hyun/keystone,o0neup/keystone,tomerk/keystone,amplab/keystone,zhaozhang/keystone,javadba/keystone,o0neup/keystone,tomerk/keystone,zhaozhang/keystone