At present, dtrace does not support conditional execution, so no if's and no loops.
With the current design, all collection of statistics is about something that is happening. This means I can't present information about objects that have no activity alongside those that do. Well, I suppose I can, but I have to either provide the information from outside of the D script or cause some iterative function to occur that the D script can monitor and learn from - both of which seem like kludges to me. Therefore what I'd like to do is be able to return an array of objects and assign them the value "0". For example: @fsactivity[zfs_list()] = zero(); ... where "zfs_list()" would return an array of strings that are the names of all the zfs filesystems and zero() is a function that would be considered an aggregation friendly function that assigned 0 to every element in fsactivity. Now I know that doing zero() is possible, and specifics of zfs_list() aside, but is it possible to support a function returning an array or list that is used to populate an array in D? Can the internals of D be easily modified to work in that fashion or would that require an extensive rewrite? Darren _______________________________________________ dtrace-discuss mailing list dtrace-discuss@opensolaris.org
