X-Git-Url: https://git.liburcu.org/?a=blobdiff_plain;f=doc%2Fman%2Flttng.1;h=dd26775ef0706eaca7c34e8e8ecf10b440a0ea88;hb=b5412c5f7b0b6853e7a0abdcf699fb7ca2b79ae5;hp=47cb96659f6940ea3d68546db7eaca8847d058b4;hpb=644ff45846d1e242907ca20e7368abc629fdfe98;p=lttng-tools.git diff --git a/doc/man/lttng.1 b/doc/man/lttng.1 index 47cb96659..dd26775ef 100644 --- a/doc/man/lttng.1 +++ b/doc/man/lttng.1 @@ -285,7 +285,8 @@ If NAME is omitted, the session name is taken from the .lttngrc file. .nf Enable tracing channel -To enable event, you must first enable a channel which contains event(s). +To enable an event, you must enable both the event and the channel that +contains it. If \fB\-s, \-\-session\fP is omitted, the session name is taken from the .lttngrc file. @@ -311,14 +312,14 @@ file. Flight recorder mode : overwrites events when subbuffers are full \-\-subbuf-size SIZE Subbuffer size in bytes (default: 4096, kernel default: 262144) + Needs to be a power of 2 for both tracers \-\-num-subbuf NUM Number of subbuffers (default: 4) - Needs to be a power of 2 for kernel and ust tracers + Needs to be a power of 2 for both tracers \-\-switch-timer USEC - Switch subbuffer timer interval in usec (default: 0) - Needs to be a power of 2 for kernel and ust tracers + Switch subbuffer timer interval in µsec (default: 0) \-\-read-timer USEC - Read timer interval in usec (default: 200) + Read timer interval in µsec (default: 200) \-\-output TYPE Channel output type. Possible values: mmap, splice .fi