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August 22nd - 24th in Toronto, Canada
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Tuesday, August 23 • 10:55am - 11:45am
Latency Outliers Root Cause Analysis in the Field by Combining Aggregation and Tracing Tools - Mathieu Desnoyers & Julien Desfossez, EfficiOS Inc.

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We present how to combine tracing and aggregation tools to automatically detect latency outliers in production systems, capture detailed context information focused around each occurrence, and perform off-line root cause analysis.

We present the LTTng (lttng.org) ecosystem, which includes tracing with the LTTng kernel and user-space tracers, online aggregation with the latency-tracker, as well as graphical and batch-mode post-processing analyses with Trace Compass (tracecompass.org) and lttng-analyses.

The run-time portion of these tools is designed for low-impact on the systems, thus allowing tracing and aggregation to be enabled in production.

We demonstrate how to use these tools in embedded, real-time and server environments through realistic user stories.


Julien Desfossez

Software Developer, EfficiOS Inc.
Julien Desfossez is a Software Developer at EfficiOS Inc working primarily on LTTng, lttng-analyses and the latency-tracker projects.
avatar for Mathieu Desnoyers

Mathieu Desnoyers

CEO, EfficiOS Inc.
Mathieu Desnoyers main contributions are in the area of tracing (monitoring/performance analysis/debugging) and scalability, both at the kernel and user-space levels. He is maintainer of the LTTng project and the Userspace RCU library. He works in close collaboration with the telecommunication industry, many Linux distributions, and with customers developing hardware scaling from small embedded devices to large-deployment servers. He is CEO and... Read More →

Tuesday August 23, 2016 10:55am - 11:45am

Attendees (21)