Title :
Hot cold optimization of large Windows/NT applications
Author :
Cohn, Robert ; Lowney, P. Geoffrey
Author_Institution :
Digital Equipment Corp., Hudson, MA, USA
Abstract :
A dynamic instruction trace often contains many unnecessary instructions that are required only by the unexecuted portion of the program. Hot-cold optimization (HCO) is a technique that realizes this performance opportunity. HCO uses profile information to partition each routine into frequently executed (hot) and infrequently executed (cold) parts. Unnecessary operations in the hot portion are removed and compensation code is added on transitions from hot to cold as needed. We evaluate HCO on a collection of large Windows/NT applications. HCO is most effective on the programs that are call intensive and have flat profiles, providing a 3-8% reduction in path length beyond conventional optimization
Keywords :
instruction sets; optimising compilers; compensation code; dynamic instruction trace; hot cold optimization; large Windows/NT applications; profile information; Appropriate technology; Kernel; Optimizing compilers;
Conference_Titel :
Microarchitecture, 1996. MICRO-29.Proceedings of the 29th Annual IEEE/ACM International Symposium on
Conference_Location :
Paris
Print_ISBN :
0-8186-7641-8
DOI :
10.1109/MICRO.1996.566452
