[ltt-dev] tracepoint layer and marker layer

Jiaying Zhang jiayingz at google.com
Wed Sep 17 18:07:43 EDT 2008


Hi Folks,

I have a general question about LTTng kernel code. As I understand, LTTng
adds an extra tracepoint layer between the traced subsystems and the
marker layer. The extra code added by the tracepoint layer seems to
introduce
noticeable overhead according to my measurements. I wonder whether it will
be more efficient and simpler if we let subsystems call the marker layer
directly?
Any thought?

Jiaying
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