Speculative multithreading

Thread Level Speculation (TLS), also known as Speculative Multithreading (SpMT) is a runtime parallelization technique which uncovers parallelism that static (compile-time) parallelization techniques fail to exploit. This particular case of speculative execution occurs at the thread level as opposed to the instruction level and can be implemented both in hardware as well as in software.

Further reading


  • Yiapanis, Paraskevas; Brown, Gavin; Lujan, Mikel (2016). "Compiler-Driven Software Speculation for Thread-Level Parallelism". ACM Transactions on Programming Languages and Systems (TOPLAS). 38 (2). doi:10.1145/2821505.
  • Yiapanis, Paraskevas; Rosas-Ham, Demian; Brown, Gavin; Lujan, Mikel (2013). "Optimizing Software Runtime Systems for Speculative Parallelization". ACM Transactions on Architecture and Code Optimization (TACO). 9 (4). doi:10.1145/2400682.2400698.
  • Johnson, Nick P.; Kim, Hanjun; Prabhu, Prakash; Zaks, Ayal; August, David I. (2012). "Speculative separation for privatization and reductions" (PDF). Proceedings of the 33rd ACM SIGPLAN Conference on Programming Language Design and Implementation. PLDI '12. pp. 359–370. doi:10.1145/2254064.2254107.
  • Bhowmik, Anasua; Franklin, Manoj (2002). "A General Compiler Framework for Speculative Multithreading". Proceedings of the fourteenth annual ACM symposium on Parallel algorithms and architectures. SPAA '02. pp. 99–108. doi:10.1145/564870.564885.
  • Bruening, Derek; Devabhaktuni, Srikrishna; Amarasinghe, Saman (2000). Softspec: Software-based Speculative Parallelism (PDF). FDDO-3. pp. 1–10.
  • Chen, Michael K.; Olukotun, Kunle (1998). "Exploiting Method-Level Parallelism in Single-Threaded Java Programs". International Conference on Parallel Architectures and Compilation Techniques. PACT 1998. pp. 176–184. doi:10.1109/PACT.1998.727190.
  • Chen, Michael K.; Olukotun, Kunle (2003). "The Jrpm System for Dynamically Parallelizing Java Programs". Proceedings of the 30th annual international symposium on Computer architecture. ISCA '03. pp. 434–446. doi:10.1145/859618.859668.
  • Cintra, Marcelo; Llanos, Diego R. (2003). "Toward Efficient and Robust Software Speculative Parallelization on Multiprocessors". Proceedings of the ninth ACM SIGPLAN symposium on Principles and practice of parallel programming. PPoPP '03. pp. 13–24. doi:10.1145/781498.781501.
  • Cook, Jonathan J. (2002). "Reverse Execution of Java Bytecode". The Computer Journal. 45 (6): 608–619. doi:10.1093/comjnl/45.6.608.
  • Quinones, Carlos Garcia; Madriles, Carlos; Sanchez, Jesus; Marcuello, Pedro; Gonzalez, Antonio; Tullsen, Dean M. (2005). "Mitosis Compiler: An Infrastructure for Speculative Threading Based on Pre-Computation Slices". Proceedings of the 2005 ACM SIGPLAN conference on Programming language design and implementation. PLDI '05. pp. 269–279. doi:10.1145/1065010.1065043.
  • Hu, Shiwen; Bhargava, Ravi; John, Lizy Kurian (2003). "The Role of Return Value Prediction in Exploiting Speculative Method-Level Parallelism" (PDF). JILP. 5: 1–21.
  • Kazi, Iffat H. (2000). A Dynamically Adaptive Parallelization Model Based on Speculative Multithreading (Ph.D. thesis). University of Minnesota. pp. 1–188.
  • Pickett, Christopher J.F.; Verbrugge, Clark (2005). "SableSpMT: A Software Framework for Analysing Speculative Multithreading in Java". Proceedings of the 6th ACM SIGPLAN-SIGSOFT workshop on Program analysis for software tools and engineering. PASTE '05. pp. 59–66. doi:10.1145/1108792.1108809.
  • Pickett, Christopher J.F.; Verbrugge, Clark (2005). "Software Thread Level Speculation for the Java Language and Virtual Machine Environment" (PDF). Proceedings of the 18th international conference on Languages and Compilers for Parallel Computing. LCPC '05. LNCS. 4339. pp. 304–318. doi:10.1007/978-3-540-69330-7_21.
  • Porter, Leo; Choi, Bumyong; Tullsen, Dean M. (2009). "Mapping Out a Path from Hardware Transactional Memory to Speculative Multithreading". 18th International Conference on Parallel Architectures and Compilation Techniques. PACT '09. pp. 313–324. doi:10.1109/PACT.2009.37.
  • Rundberg, Peter; Stenstrom, Per (2001). "An All-Software Thread-Level Data Dependence Speculation System for Multiprocessors" (PDF). JILP. 3: 1–28.
  • Steffan, J. Gregory; Colohan, Christopher; Zhai, Antonia; Mowry, Todd C. (2005). "The STAMPede Approach to Thread-Level Speculation". TOCS. 23 (3): 253–300. doi:10.1145/1082469.1082471.
  • Whaley, John; Kozyrakis, Christos (2005). "Heuristics for Profile-driven Method-level Speculative Parallelization". International Conference on Parallel Processing. ICPP 2005. pp. 147–156. doi:10.1109/ICPP.2005.44.
  • Renau, Jose; Strauss, Karin; Ceze, Luis; Liu, Wei; Sarangi, Smruti; Tuck, James; Torrellas, Josep (2006). "Energy-Efficient Thread-Level Speculation" (PDF). IEEE Micro. 26 (1): 80–91. doi:10.1109/MM.2006.11.
  • Yoshizoe, Kazuki; Matsumoto, Takashi; Hiraki, Kei (1998). "Speculative Parallel Execution on JVM". UK Workshop on HPNC. pp. 1–20.
  • Oancea, Cosmin E.; Mycroft, Alan; Harris, Tim (2009). "A Lightweight In-Place Implementation for Software Thread-Level Speculation" (PDF). Proceedings of the twenty-first annual symposium on Parallelism in algorithms and architectures. SPAA '09. pp. 1–10. doi:10.1145/1583991.1584050.


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