Hardware support for out-of-order instruction profiling on Alpha 21264a

摘要: Vandevoorde_v2.ppt [Read-Only] Page 1 www.compaq.com Hardware Support for Out-of-Order Instruction Profiling on Alpha 21264a Lance Berc & Mark Vandevoorde Joint work with: Jennifer Anderson, Jeff Dean, Sanjay Ghemawat, Shun-Tak Leung, Mitch Litchenberg, Gerard Vernes, Carl Waldspurger, William E. Weihl, and Jonathan White dcpi@pa.dec.com http://www.research.digital.com/SRC/dcpi/ Compaq Systems Research Center Palo Alto, CA 94301 USA Page 2 Related Trends ◆ More aggressive CPUs ● More performance puzzles ◆ Widening gap in peak-vs-actual performance ◆ More sophisticated performance tools ● Digital Continuous Profiling Infrastructure (DCPI) – Where CPU cycles went – Where peak performance was lost and why ● Others: Morph, SGI Speedshop, VTune Page 3 Detailed Information Matters DCPI experience on the Alpha ◆ TPC-D: 10% speedup ◆ Duplicate filtering for …