Kevin Gosse @kookiz

Grégory Léocadie

Christophe Nasarre

How we integrated the LTTng pipeline to monitor .NET Core applications on Linux

PLACEHOLDER IMAGE

2 | Copyright © 2017 Criteo

• 8747 servers running Windows

• 4000+ front-end servers

• 205 billions HTTP request per day

Criteo in numbersCriteo in numbers

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Plumbing timePlumbing time

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Windows Pipeline to GrafanaWindows Pipeline to Grafana

Appgrafana

CompanionService

ETWevents

CLRevents

Windows

ETWCLR

Trace Event

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Windows Pipeline to GrafanaWindows Pipeline to Grafana

Appgrafana

CompanionService

ETWevents

Windows

ETWCLR CLRevents

Trace Event

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CentOS Pipeline to Grafana - 1/3CentOS Pipeline to Grafana - 1/3

AppgrafanaCTF

events

CentOS

LTTngCLR ?...?...Companionlistener

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CLRAppUST

Consumerd

Relayd

Companion listener

How to integrate the LTTng pipeline in CriteoHow to integrate the LTTng pipeline in Criteo

CentOS

Companion

listener

Companion

listener

Windows

DebuggingProfiling

…

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CentOS Pipeline to Grafana - 2/3CentOS Pipeline to Grafana - 2/3

AppgrafanaCTF

events

CentOS

LTTngCLR Companionlistener

Trace EventTrace Event

Parse CLR

events

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• Use TraceEvent library but… only file-based ctor

• Implement LTTng live session support: https://github.com/Microsoft/perfview/pull/340

Decyphering CLR event produced as CTF tracesDecyphering CLR event produced as CTF traces

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CentOS Pipeline to Grafana - 3/3CentOS Pipeline to Grafana - 3/3

AppgrafanaCTF

events

CentOS

LTTngCLR Companionlistener

Trace EventTrace Event

Parse CLR

events

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Lessons we learned

• Linux rocks for Windows developers … with .NET Core!

• LTTng documentation… not very Windows developer friendly

• Ongoing effort on Microsoft TraceEvent Open Source Library