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Links 1 through 10 of 107 by Ken Robson tagged tools

When I/O latency is presented as a visual heat map, some intriguing and beautiful patterns can emerge. These patterns provide insight into how a system is actually performing and what kinds of latency end-user applications experience. Many characteristics seen in these patterns are still not understood, but so far their analysis is revealing systemic behaviors that were previously unknown.

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Simtools.xla and Formlist.xla are add-ins for Microsoft Excel (version 5 and later). Simtools adds statistical functions and procedures for doing Monte Carlo simulation and risk analysis in spreadsheets. Formlist is a simple auditing tool that adds procedures for displaying the formulas of any selected range. Also available here is Torndiag.xls, an Excel workbook for making "tornado" sensitivity-analysis diagrams. Simtools and Formlist were developed to facilitate applications of probability and statistics, and to help managers do complex decision analysis. These programs are distributed as freeware for individual use, and may be freely redistributed to students and faculty in an academic institution. All other rights are reserved.

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Finding out why your Linux computer performs the way it does has been a hard task. Sure, there is Oprofile, and even ‘perf’ in recent kernels. There is LatencyTOP to find out where latencies happen.

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Summary:  Modern operating system kernels provide the means for introspection, the ability to peer dynamically within the kernel to understand its behaviors. These behaviors can indicate problems in the kernel as well as performance bottlenecks. With this knowledge, you can tune or modify the kernel to avoid failure conditions. Discover an open source infrastructure called SystemTap that provides this dynamic introspection for the Linux® kernel.

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Exmap is a utility which takes a snapshot of how the physical memory and swap space are currently used by all the processes on your system. It examines which page of memory are shared between which processes, so that it can share the cost of the pages fairly when calculating usage totals.

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Iperf is a tool to measure the bandwidth and the quality of a network link. Jperf can be associated with Iperf to provide a graphical frontend written in Java.

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Stakeholder influence mapping is a tool to examine and visually display the relative
influence that different individuals and groups have over decision-making. This paper
describes one approach to doing this and presents several examples from its use.

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Knowtes optimizes your study. By adding a card to your Knowtes memory, it becomes due at optimized intervals. The Knowtes Adaptive Learning Engine then adjusts how frequently you have to study cards in your memory based on how well you do on them. No more

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Quizlet helps you and your friends learn vocabulary. You make a list of words, and we teach them to you. Feeling lazy? Your friends can share their lists with you. You'll never use flashcards again. Plus, it's free. Take the video tour or sign up now!

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The Mnemosyne software resembles a traditional flash-card program to help you memorise question/answer pairs, but with an important twist: it uses a sophisticated algorithm to schedule the best time for a card to come up for review. Difficult cards that y

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