......Extracting high performance from chip multiprocessors (CMPs) requires partitioning the application into threads that execute concurrently on multiple cores. Because threads cannot be allowed to update shared data concurrently, accesses to shared data are encapsulated inside critical sections. Only one thread executes a critical section at a given time; other threads wanting to execute the...

This paper extends previous work in value speculation scheduling [14] with an expanded ISA, new recovery code generation methods, and better instruction selection techniques. Our results show that critical instructions are not as predictable as non-critical instructions, instructions at the top of local critical paths have higher predictability than instructions in the middle, and that long-lat...

In this paper, we introduce a runtime, nontrace-based algorithm to compute the critical path profile of the execution of message passing and shared-memory parallel programs. Our algorithm permits starting or stopping the critical path computation during program execution and reporting intermediate values. We also present an online algorithm to compute a variant of critical path, called critical...

Background and Objective: Intraoperative consultation by frozen section is a high – risk procedure with important consequences. Therefore, it is critical to determine efficiency of frozen section performance periodically. This study was performed to determine the accuracy of frozen section in Urmia University of Medical Sciences. Materials & Methods:Inthis cross sectional study, we compared th...

Concurrent programming is often more challenging than sequential programming, however. Many of these challenges arise from the need to serialize access to shared resources. In particular, threads that run concurrently can access the same other objects or variables simultaneously and potentially corrupt these objects' and variables' internal state. Therefore, code that should not execute concurr...

This paper reviews the experimental information on the behavior of the viscosity and thermal conductivity of fluids near the critical point. Section 2 presents some general remarks on experimental complications associated with the measurement of these properties in the critical region. Experimental work on the viscosity of one component fluids near the liquid-vapor critical point is rev...