Wednesday, August 13, 2014

Intel TSX Multicore Scalability in the Wild

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Multicore processors were introduced to an unsuspecting marketplace more than a decade ago, but really became mainstream circa 2005. Multico...
Wednesday, July 30, 2014

A Little Triplet

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Little's law appears in various guises in performance analysis. It was known to Agner Erlang (the father of queueing theory) in 1909 to...
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Sunday, July 20, 2014

Continuous Integration Gets Performance Testing Radar

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As companies embrace continuous integration (CI) and fast release cycles, a serious problem has emerged in the development pipeline: Conven...
Thursday, July 17, 2014

Restaurant Performance Sunk by Selfies

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An interesting story appeared last weekend about a popular NYC restaurant realizing that, although the number of customers they served on a...
Thursday, July 3, 2014

How to Remember the Poisson Distribution

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The Poisson cumulative distribution function (CDF) \begin{equation} F(α,n) = \sum_{k=0}^n \dfrac{α^k}{k!} \; e^{-α} \label{eqn:pcdf} \end{...
Thursday, June 26, 2014

Load Average in FreeBSD

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In my Perl PDQ book there is a chapter, entitled Linux Load Average , where I dissect how the load average metric (or metrics, since there ...
Friday, June 6, 2014

The Visual Connection Between Capacity And Performance

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Whether or not computer system performance and capacity are related is a question that comes up from time to time, especially from those w...