LTTngTop: Human Readable Trace Viewer

Registered by LPC Submitter on 2012-05-16

Julien Desfossez (<email address hidden>)

LTTngTop is a top-alike kernel trace viewer. It uses the LTTng
trace format (CTF) as input and benefits from the whole kernel tracing
infrastructure (tracepoints, kprobes, kretprobes and perf PMU counters).
This tool uses the tracing information to represent the
state of the kernel at any point in time. As of now it displays the CPU
and I/O usage, as well as the performance (PMU) counters evolution
associated with all processes. It also provides a detailed view for
each process including the file descriptors opened and the amount of
data read and written for each. This project is still in active
development mode as live tracing is being included and more views are
added progressively to suit the needs of developers and system
administrators. After presenting the tool and its potential, the
discussion will cover the future views and analysis that the Linux
Plumbers would be most interested in.

Julien Desfossez is a software developer at Efficios Inc. He comes from
a background of large scale system administration and security after
working several years at Revolution Linux. He is now also a Ph.D.
student at Polytechnique Montreal. His main focus is Linux kernel
tracing as a debugging facility for large scale data centers.

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