Debugging Linux: Latency heatmaps


“Odd patterns of I/O latency can be hidden by line graphs and summary statistics, and revealed by histograms and heat maps. In my previous post I showed my Linux iosnoop tool, which can trace block device I/O along with timestamps and latency. This information can be visualized, revealing any odd patterns.”

Bildschirmfoto 2014-07-27 um 12.55.50

Source: http://www.brendangregg.com/blog/2014-07-23/linux-iosnoop-latency-heat-maps.html

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