LTTng - Revision history

Peter Huewe: /* External Links */

2012-04-26T22:33:55Z

‎External Links

Peter Huewe: Added Links

2012-04-26T22:33:35Z

Added Links

Scientist: New website

2011-03-17T19:09:44Z

New website

Scientist at 19:08, 17 March 2011

2011-03-17T19:08:44Z

Glenn: catspec

2008-02-10T20:50:04Z

catspec

Glenn: +Category:Categories

2008-02-10T18:47:30Z

+Category:Categories

Prpplague at 21:15, 24 September 2007

2007-09-24T21:15:17Z

Prpplague at 21:13, 24 September 2007

2007-09-24T21:13:56Z

Prpplague at 21:13, 24 September 2007

2007-09-24T21:13:32Z

Prpplague at 21:12, 24 September 2007

2007-09-24T21:12:30Z

New page

Linux Trace Toolkit Viewer/Next Generation

LTTV is a modular viewer/analysis tool specifically designed to deal with very
large traces generated by a production system.

It comes with a Linux kernel tracer, Linux Trace Toolkit Next Generation
(LTTng), which builds on the existing LTT tracepoints and RelayFS delivery
mechanism but is a complete rewrite of LTT tracing module and daemon.

The design aims at facilitating contributions from the community. We know that
the vast quantity of analysis that can be performed on trace data is
practically unlimited, so we want to make it as easy and fun as possible to add
those to the project.

You can get it at http://ltt.polymtl.ca. Follow the Quickstart guide to know how
to get it from Debian packages, RPM or sources.

LTTV key features :

- Support for large traces (it has been tested with 15GB traces). I has been
designed from the start to deal with huge traces.
- Information from several tracefiles can be combined in a single view on the
fly.
- Deals with traces coming from any architecture size or endianness.
- Text command line interface supporting plugins for trace batch analysis.
- Graphical interface supporting visualisation plugins.
- Flexible event filter.
- Modular architecture :
* dynamically loadable plugins : each specific view/analysis becomes a
plugin.
* module dependencies architecture for maximum functionnality reuse and
easier testing.
- Addition of new instrumentations (or any kind of trace point) becomes easier
with an event description parser and a tracing code generator (genevent).

You can also get LTTng from http://ltt.polymtl.ca. Available in Debian, RPM and
sources packages. See the Quickstart guide.

LTTng key features :

- Easy addition of new instrumentations by supporting the genevent code
generator.
- Very precise timestamps on events by using the processor cycle counter
as an unique monotonic time reference.
- Minimal impact on the traced system : instrumentation does not disable
interrupts or take locks. It uses RCU and cmpxchg atomic operations instead.
- Non maskable interrupts (NMI) reentrancy.
- Supports many nestable types : structures, unions, arrays, sequences.
- Supports host dependant types.
- Makes dynamic alignment of trace data with a low overhead.
- Integration with LTTV viewer so tracing can be controlled directly from the
graphical interface.
- Can record many (n) independant traces at once.
- Modular architecture.

http://lwn.net/Articles/166952/

@@ Line 50: / Line 50: @@
 == External Links ==
-[http://lwn.net/Articles/491510/ lwn.net: LTTng 2.0: Tracing for power users and developers - part 1]
+* [http://lwn.net/Articles/491510/ lwn.net: LTTng 2.0: Tracing for power users and developers - part 1]
-[http://lwn.net/Articles/492296/ lwn.net: LTTng 2.0: Tracing for power users and developers - part 2]
+* [http://lwn.net/Articles/492296/ lwn.net: LTTng 2.0: Tracing for power users and developers - part 2]
 [[Category:Linux]]

@@ Line 27: / Line 27: @@
 *Modular architecture :
    - dynamically loadable plugins : each specific view/analysis becomes a plugin.
-   - module dependencies architecture for maximum functionnality reuse and easier testing.
+   - module dependencies architecture for maximum functionality reuse and easier testing.
 *Addition of new instrumentations (or any kind of trace point) becomes easier with an event description parser and a tracing code generator (genevent).
@@ Line 41: / Line 41: @@
 *Non maskable interrupts (NMI) reentrancy.
 *Supports many nestable types : structures, unions, arrays, sequences.
-*Supports host dependant types.
+*Supports host dependent types.
 *Makes dynamic alignment of trace data with a low overhead.
 *Integration with LTTV viewer so tracing can be controlled directly from the graphical interface.
-*Can record many (n) independant traces at once.
+*Can record many (n) independent traces at once.
 *Modular architecture.
 http://lwn.net/Articles/166952/
 [[Category:Linux]]

@@ Line 14: / Line 14: @@
-You can get it at http://ltt.polymtl.ca. Follow the Quickstart guide to know how
+You can get it at http://www.lttng.org. Follow the Quickstart guide to know how
 to get it from Debian packages, RPM or sources.
@@ Line 31: / Line 31: @@
-You can also get LTTng from http://ltt.polymtl.ca . Available in Debian, RPM and
+You can also get LTTng from http://www.lttng.org . Available in Debian, RPM and
 sources packages. See the Quickstart guide.

@@ Line 48: / Line 48: @@
 http://lwn.net/Articles/166952/
-−
 [[Category:Linux]]

← Older revision		Revision as of 20:50, 10 February 2008
Line 49:		Line 49:
	http://lwn.net/Articles/166952/		http://lwn.net/Articles/166952/

−	[[Category:~~Categories~~]]	+	[[Category:Linux]]

← Older revision		Revision as of 18:47, 10 February 2008
Line 48:		Line 48:

	http://lwn.net/Articles/166952/		http://lwn.net/Articles/166952/
		+
		+	[[Category:Categories]]

@@ Line 26: / Line 26: @@
 *Flexible event filter.
 *Modular architecture :
-    *dynamically loadable plugins : each specific view/analysis becomes a plugin.
+ *dynamically loadable plugins : each specific view/analysis becomes a plugin.
-    * module dependencies architecture for maximum functionnality reuse and easier testing.
+ * module dependencies architecture for maximum functionnality reuse and easier testing.
 *Addition of new instrumentations (or any kind of trace point) becomes easier with an event description parser and a tracing code generator (genevent).

@@ Line 19: / Line 19: @@
 LTTV key features :
-- Support for large traces (it has been tested with 15GB traces). I has been
+*Support for large traces (it has been tested with 15GB traces). I has been designed from the start to deal with huge traces.
-  designed from the start to deal with huge traces.
+*Information from several tracefiles can be combined in a single view on the fly.
-- Information from several tracefiles can be combined in a single view on the
+*Deals with traces coming from any architecture size or endianness.
-  fly.
+*Text command line interface supporting plugins for trace batch analysis.
-- Deals with traces coming from any architecture size or endianness.
+*Graphical interface supporting visualisation plugins.
-- Text command line interface supporting plugins for trace batch analysis.
+*Flexible event filter.
-- Graphical interface supporting visualisation plugins.
+*Modular architecture :
-- Flexible event filter.
+     *dynamically loadable plugins : each specific view/analysis becomes a plugin.
-- Modular architecture :
+     * module dependencies architecture for maximum functionnality reuse and easier testing.
-     * dynamically loadable plugins : each specific view/analysis becomes a
+*Addition of new instrumentations (or any kind of trace point) becomes easier with an event description parser and a tracing code generator (genevent).
-      plugin.
      * module dependencies architecture for maximum functionnality reuse and
-      easier testing.
-- Addition of new instrumentations (or any kind of trace point) becomes easier
-  with an event description parser and a tracing code generator (genevent).