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seminars:seminar_10_02_03 [2017/09/20 22:02] (current)
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 +====== ParaLog: Enabling and Accelerating Online Pa-rallel Monitoring of Multithreaded Applications ​ ======
  
 +
 +Tuesday March 02, 2010\\
 +Hamerschlag Hall D-210\\
 +4:00 pm\\
 +
 +{{:​seminars:​evangelos.png}}
 + 
 +
 +**[[www.ece.cmu.edu|Evangelos Vlachos]]**\\
 +CMU ECE\\
 +
 +=====Abstract=====
 +
 +Instruction-grain lifeguards monitor the events of a running application at the level of individual instructions in order to identify and help mitigate application bugs and security exploits. However, most existing lifeguards focus on single-threaded applications and can be difficult to parallelize,​ since they must be aware of the relative orderings of memory accesses and other events issued by concurrent threads.
 +In this talk I will present ParaLog, the first design of a system enabling fast online parallel monitoring of multithreaded applications. We identify and solve several challenges in monitoring parallel applications,​ including (i) enforcing inter-thread data depen-dences,​ (ii) dealing with inter-thread effects that are not reflected in coherence traffic, (iii) ensuring lifeguards can access shared metadata with negligible syn-chronization overheads and (iv) designing general-purpose hardware accelerators able to work in a multithreaded environment,​ lowering monitoring overhead. ​
 +We implement and evaluate our design on a 16 core simulated CMP, using benchmarks from SPLASH-2 and PARSEC and two lifeguards: a data-flow tracking lifeguard and a memory-access checker lifeguard, showing at least a 5X speedup over existing techniques.
 +
 +
 +=====Bio=====
 +
 +Evangelos Vlachos is a 4th year PhD student at Carnegie Mellon (ECE), ad-vised by Todd Mowry. His research in-terests lie in the area of computer ar-chitecture and specifically in hardware support for increasing debugging ability in modern systems.
 +
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