[lttng-dev] [PATCH lttng-tools] Add vpid, vppid and vtid explanation in add-context help menu

[David Goulet]

On 18 Jun (22:19:40), francis.deslauriers at efficios.com wrote:
> From: Francis Deslauriers <francis.deslauriers at efficios.com>
> 
> Signed-off-by: Francis Deslauriers <francis.deslauriers at efficios.com>
> ---
>  src/bin/lttng/commands/add_context.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/src/bin/lttng/commands/add_context.c b/src/bin/lttng/commands/add_context.c
> index 405b782..52d0db4 100644
> --- a/src/bin/lttng/commands/add_context.c
> +++ b/src/bin/lttng/commands/add_context.c
> @@ -514,6 +514,9 @@ static void usage(FILE *ofp)
>  	fprintf(ofp, "                           TYPE can be one of the strings below:\n");
>  	print_ctx_type(ofp);
>  	fprintf(ofp, "\n");
> +	fprintf(ofp, "Note that the vpid, vppid and vtid context types represent the virtual process id,\n"
> +			"virtual parent process id and virtual thread id as seen from the current execution context\n"
> +			"as oppose to the pid, ppid and tid that are kernel internal data structures.\n\n");

That would be kind of neat if you could also add this to the man page.
Usually, I try to keep both the --help and man page in sync :).

Cheers!
David

>  	fprintf(ofp, "Example:\n");
>  	fprintf(ofp, "This command will add the context information 'prio' and two per-cpu\n"
>  			"perf counters (hardware branch misses and cache misses), to all channels\n"
> -- 
> 1.8.3.2
> 
> 
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