hash_get is used for both lookup and insert; add a tracepoint for when
we insert something into the hash
Signed-off-by: Quentin Young <qlyoung@nvidia.com>
LTTng supports tracef() and tracelog() macros, which work like printf,
and are used to ease transition between logging and tracing. Messages
printed using these macros end up as trace events. For our uses we are
not interested in dropping logging, but it is nice to get log messages
in trace output, so I've added a call to tracelog() in zlog that dumps
our zlog messages as trace events.
Signed-off-by: Quentin Young <qlyoung@nvidia.com>
This commit adds initial support for LTTng.
When --enable-lttng=no or is not specified, no tracing code is included.
When --enable-lttng=yes, LTTng tracing events are (will be) generated.
configure.ac:
- add --enable-lttng
- define HAVE_LTTNG when enabled
- minimum LTTng version: 2.12.0
lib:
- add trace.[ch]
- update subdir.am
Signed-off-by: Quentin Young <qlyoung@nvidia.com>
