Big data analytics is emerging as one kind of the most important workloads in modern data centers. Hence,it is of great interest to identify the method of achieving the best performance for big data analytics workload...Big data analytics is emerging as one kind of the most important workloads in modern data centers. Hence,it is of great interest to identify the method of achieving the best performance for big data analytics workloads running on state-of-the-art SMT( simultaneous multithreading) processors,which needs comprehensive understanding to workload characteristics. This paper chooses the Spark workloads as the representative big data analytics workloads and performs comprehensive measurements on the POWER8 platform,which supports a wide range of multithreading. The research finds that the thread assignment policy and cache contention have significant impacts on application performance. In order to identify the potential optimization method from the experiment results,this study performs micro-architecture level characterizations by means of hardware performance counters and gives implications accordingly.展开更多
Palmar plate fixation is becoming a well recognized treatment for distal radial fracture. Tendon ruptures or irritations have been reported after this procedure. Inadvertent retention of angled drill guides useful for...Palmar plate fixation is becoming a well recognized treatment for distal radial fracture. Tendon ruptures or irritations have been reported after this procedure. Inadvertent retention of angled drill guides useful for easy placement of locking screws in proper direction in volar plating can represent a high risk of secondary tendon rupture. In this case, we presented our experience in one patient in whom drill guides removal could be delayed for one year and summarized our techniques to prevent the aforementioned complications.展开更多
基金Supported by the National High Technology Research and Development Program of China(No.2015AA015308)the State Key Development Program for Basic Research of China(No.2014CB340402)
文摘Big data analytics is emerging as one kind of the most important workloads in modern data centers. Hence,it is of great interest to identify the method of achieving the best performance for big data analytics workloads running on state-of-the-art SMT( simultaneous multithreading) processors,which needs comprehensive understanding to workload characteristics. This paper chooses the Spark workloads as the representative big data analytics workloads and performs comprehensive measurements on the POWER8 platform,which supports a wide range of multithreading. The research finds that the thread assignment policy and cache contention have significant impacts on application performance. In order to identify the potential optimization method from the experiment results,this study performs micro-architecture level characterizations by means of hardware performance counters and gives implications accordingly.
文摘Palmar plate fixation is becoming a well recognized treatment for distal radial fracture. Tendon ruptures or irritations have been reported after this procedure. Inadvertent retention of angled drill guides useful for easy placement of locking screws in proper direction in volar plating can represent a high risk of secondary tendon rupture. In this case, we presented our experience in one patient in whom drill guides removal could be delayed for one year and summarized our techniques to prevent the aforementioned complications.
