Re: Stupid Instruments questions
Re: Stupid Instruments questions
- Subject: Re: Stupid Instruments questions
- From: Quincey Morris <email@hidden>
- Date: Tue, 18 Oct 2011 19:01:52 -0700
On Oct 18, 2011, at 17:44 , Jens Alfke wrote: (1) How the @*$% do I zoom the timescale in and out? The only thing I’ve found is the View>Snap Track To Fit command, which zooms the recorded time to the full width of the window. Isn’t there any normal zoom in/out as in every other app with a timeline?
There's a zoom slider at the bottom of the list of instruments being used. Though I didn't even recognize it as a slider until I saw the tooltip. And mine appears to be broken (also 4.2, 10.7.2). (2) What’s the difference between Time Profiler and Sampler? The descriptions use different wording but seem to say the same thing; the only difference seems to be that the former can sample multiple processes. Provided I only care about one process, is there any benefit to one vs the other? I actually just tried adding both of them, but the results are bizarre: the CPU loads shown in their graphs are completely different, almost inverses of each other, so I’m assuming that they interfere with each other and shouldn’t be used at the same time.
I believe Time Profiler is answering the question, "What is each CPU spending its time doing?", while the Sampler is answering the question, "What is each thread spending its time doing?" However, since the answer to either question always seems to be, "Waiting, except for a negligibly small percentage of the time," I guess you could use either. (AFAICT, there's no instrument that answers the question, "What is each thread doing during those times when it's doing something other than waiting?" That's the instrument I want.)
|
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Xcode-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden