CPU scheduling is one of the most crucial operations performed by operating system. Different algorithms are available for CPU scheduling amongst them RR (Round Robin) is considered as optimal in time shared environment. The effectiveness of Round Robin completely depends on the choice of time quantum. In this paper a new CPU scheduling algorithm has been proposed, named as DABRR (Dynamic Avera...

CPU scheduling is the basis of multi programmed operating system. The idea of multiprogramming is relatively simple, if a process (job) is waiting for an I/O request, then CPU switches from one job to another job so that CPU is always busy and computer becomes more productive. Scheduling is a fundamental operating system function, almost all computer resources are scheduled before use. The CPU ...

HP (Digital) Continuous Profiling Infrastructure, DCPI for OpenVMS, uses the hardware performance counters of the Alpha chip to overcome these limitations. DCPI provides a “fine-grained” view of the system. During the analysis of data, DCPI produces information ranging from the time spent in individual executable images to which instructions are executed within an executable image. It also prov...

Original scientific paper An effort has been made to propose a CPU load based dynamic, cooperative, trust based, and secure file replication approach based along with consistency among file replicas for distributed environment. Simulation results consisting of 100 requesting nodes, three file servers and file size ranging from 677 KB to 11 MB establishes that, when the CPU load is taken into co...

Limited battery power is a typical constraint in stand-alone embedded systems. One way to extend the battery lifetime is by reducing CPU power consumption. Because of the quadratic relationship between power consumption in CMOS circuits and CPU voltage, power reduction can be obtained by scaling down supply voltage, or Dynamic Voltage Scaling. However, reducing supply voltage slows down CPU spe...

The problem of recording CPU demand for communications operations is handled poorly by some instrumentation techniques. A simple technique is described that does not require instrumenting the code (so it can be used without having the source code), and that can be used with any operating system. It records the displacement of a CPU-intensive looping process by the process under test, and comput...

CPU port contention has been used in the last years as a stateless side channel to perform side-channel attacks and transient execution attacks. One drawback of this is that it heavily relies on simultaneous multi-threading, which can be absent from some CPUs or simply disabled by OS. In paper, we present sequential contention, does not require SMT. It exploits sub-optimal scheduling ports for ...