Uploading the lttng prototype patch that I showed on the demo in Barcelona.
Attachment: lttng-barcelona.diff (59.7 kB; text/x-patch)
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** [tickets:#454] osaf: Integration with LTTng-UST**
**Status:** unassigned
**Created:** Wed Jun 12, 2013 11:28 AM UTC by Anders Widell
**Last Updated:** Mon Sep 02, 2013 02:07 PM UTC
**Owner:** nobody
Migrated from <http://devel.opensaf.org/ticket/2809>
References:
<http://lttng.org/files/doc/man-pages/man3/lttng-ust.3.html>
<http://lttng.org/ust>
Requirements (to be discussed):
- Add tracepoints for SAF AIS APIs in the following priority order: IMM, AMF,
CKPT, SMF, NTF, ..
- Tracepoints are added in the shared libraries
- Some tracepoints should be added in the server processes, some in this case
means error handling/validation of API parameters
(- opensaf internal implementation tracing is a next step)
- Default provider name should be "org_opensaf"
- Provider name should be changeable at compile time
- LTTng-UST support should be optional, either the added tracepoints becomes
nops or are converted to some other backend (e.g. file like in the current
trace system)
- Tracepoint name should be e.g. "ais_imm_om_ccbapply",
"ais_amf_componentregister"
- API parameters should be traced, especially unique things like DNs, CCBID etc
- A downcall (such as saAmfComponentRegister) should be traced with two trace
points, one for the request and one for the response, they need names with a
suffix something like a _req and _resp
- A callback with a void return value (such as SaAmfCSISetCallbackT) should be
traced with one tracepoint
- A callback with a non void return value (such as saImmOiObjectCallbackT)
should be traced with two tracepoints
- the server should use the same tracepoint name for parameter validation, with
such change the use of syslog for invalid parameters can be removed.
- ...
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