منابع مشابه
Biological Timekeeping.
The daily transition from light to darkness has significantly shaped the evolution of most living species, from unicellular organisms to mammals. Adaptation to this environmental constraint occurred through the emergence of a circadian system capable of adjusting both behavioral and physiological processes to this light-dark cycle. Superimposed upon the daily light-dark cycle is a seasonal infl...
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This paper describes a massive survey of Network Time Protocol @TI") servers and clients in order to discover statistics of time and frequency mm, as well as determine the health and welfare of the NTP synchronization subnet operating in the global Internet. Among the conclusions of the survey are that most NTP clocks are within 21 ms of their synchronization sources and all are within 29 ms on...
متن کاملTimekeeping in VMware Virtual Machines
Because virtual machines work by time‐sharing host physical hardware, a virtual machine cannot exactly duplicate the timing behavior of a physical machine. VMware virtual machines use several techniques to minimize and conceal differences in timing behavior, but the differences can still sometimes cause timekeeping inaccuracies and other problems in software running in a virtual machine. This i...
متن کاملCAR: Clock with Adaptive Replacement
CLOCK is a classical cache replacement policy dating back to 1968 that was proposed as a low-complexity approximation to LRU. On every cache hit, the policy LRU needs to move the accessed item to the most recently used position, at which point, to ensure consistency and correctness, it serializes cache hits behind a single global lock. CLOCK eliminates this lock contention, and, hence, can supp...
متن کاملThe EELRU adaptive replacement algorithm
The wide performance gap between processors and disks ensures that effective page replacement remains an important consideration in modern systems. This paper presents early eviction LRU (EELRU), an adaptive replacement algorithm. EELRU uses aggregate recency information to recognize the reference behavior of a workload and to adjust its speed of adaptation. An on-line cost/benefit analysis gui...
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ژورنال
عنوان ژورنال: ACM Transactions on Architecture and Code Optimization
سال: 2011
ISSN: 1544-3566,1544-3973
DOI: 10.1145/1952998.1953001