On Saturday, August 20, 2011 14:10:44 unDEFER wrote: > Hello, again! > I want one very strange feature. I even don't know if it is really > possible with C for any OS. > But I sure that in D it must be not more complicate to get this > information. > > So I want to get how much ticks of CPU was wasted on some function > (including all calls) in real time. > Seems profiler give this information but only when the program was end. > Is it possible to get the same at runtime? > Also is it possible to get profiler info from other process before end of > program? > > I know with core.time or std.c.time I can measure real time of function > execution, but it will too much different depend on system loading. > But I want to get approximately the same numbers at the same point of > program. > > Thank you in advance! > Sorry if I send this question to not right mail list.
If you're looking to time how long a function takes to call, then use std.datetime.benchmark. If you're looking to determine how much your specific program calls a particular function and how much time it spends in that function, then compile with -profile, run the program, and then look at the files that it generates. If you want to do the equivalent of -profile at runtime, I don't think that that's really possible, and I'm not quite sure why you'd want to. But even if you could, it would affect the performance of the program and probably skew the results anyway. It would certainly slow down the program a lot. I suppose that you could write a wrapper function for your specific function, time the exact time that it takes on each call with std.datetime.StopWatch, and then send that information to another process via std.socket if you really want something like that. But that sort of thing sounds rather complicated to me, and I have no idea what good the information would do you at runtime anyway. Usually, the reason that people want to profile code is to determine what code they need to optimize make the program faster, and -profile is plenty for that. - Jonathan M Davis _______________________________________________ phobos mailing list [email protected] http://lists.puremagic.com/mailman/listinfo/phobos
