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Diffstat (limited to 'docs/tracing.txt')
| -rw-r--r-- | docs/tracing.txt | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/docs/tracing.txt b/docs/tracing.txt index e62444ca68..f351998a4e 100644 --- a/docs/tracing.txt +++ b/docs/tracing.txt @@ -150,13 +150,16 @@ The trace backends are chosen at configure time: For a list of supported trace backends, try ./configure --help or see below. If multiple backends are enabled, the trace is sent to them all. +If no backends are explicitly selected, configure will default to the +"log" backend. + The following subsections describe the supported trace backends. === Nop === The "nop" backend generates empty trace event functions so that the compiler -can optimize out trace events completely. This is the default and imposes no -performance penalty. +can optimize out trace events completely. This imposes no performance +penalty. Note that regardless of the selected trace backend, events with the "disable" property will be generated with the "nop" backend. |