January/February 2018 issue of acmqueue

The January/February issue of acmqueue is out now


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Originally published in Queue vol. 14, no. 2
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Jez Humble - Continuous Delivery Sounds Great, but Will It Work Here?
It's not magic, it just requires continuous, daily improvement at all levels.

Nicole Forsgren, Mik Kersten - DevOps Metrics
Your biggest mistake might be collecting the wrong data.

Alvaro Videla - Metaphors We Compute By
Code is a story that explains how to solve a particular problem.

Ivar Jacobson, Ian Spence, Pan-Wei Ng - Is There a Single Method for the Internet of Things?
Essence can keep software development for the IoT from becoming unwieldy.


(newest first)

Brendan Gregg | Mon, 25 Apr 2016 19:34:26 UTC

G'Day Zoltan,

Thanks, I think that's a good direction to explore, and have been wondering about the same layout. So (as is probably obvious) the advantages are that multiple occurrences of the same child functions can be merged, despite different paths, and that we also retain the value of linear comparisons: all boxes widths are still to the same scale (unlike, say, kcachegrind and other visualizations that use color or oval size, which are more difficult to quickly compare).

This will need to be tested with bigger profiles. It might get too messy, and stop being intuitive. Perhaps that can be improved by limiting the number of these merges (ie, limiting the number of arrows to the top most merging 5, or closer to the root only; don't want a ton of arrows to mutex_tryenter or malloc or free).

Zoltan Farkas | Sun, 24 Apr 2016 04:04:44 UTC


what do you think about evolving the visualization to better visualize hotspots like:


cheers, keep up the good work


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