Messages in this thread | | | Date | Thu, 25 Apr 2013 10:17:35 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH V2 1/4] perf: Add hardware breakpoint address mask |
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On 04/25/2013 10:06 AM, Oleg Nesterov wrote: >> >> The downside is that in userland perf tool we need differing documentation >> on what the mask syntax means for each architecture. > > Personally I think this is acceptable. > > But I am new to this code, so... >
That would seem really, really awkward. Yes, perf has a bunch of low-level stuff, but it would seem highly undesirable to force the user to deal with something like that.
It would be good to have a user-friendly syntax that covers most of what users may want to do and perhaps a longer form that can express everything including ARM's byte selects; if the system can't honor the request it should return an error.
-hpa
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