It adds a new structure which is linked with each TBs and stores its statistics. We collect the execution count of the TBs and store in this new structure. The information stored in this new struct is then used to support a new command line -d hot_tbs:N which dumps information of the N most hot TBs.
Different from v1 now the execution count is being updated directly from the TBStatistics so we do not need to copy the data when flushing. [PATCH v2 1/4] add and link a statistic struct to TBs [PATCH v2 2/4] Adding an optional tb execution counter. [PATCH v2 3/4] Introduce dump of hot TBs [PATCH v2 4/4] adding -d hot_tbs:limit command line option
