Date: Fri, 2 Dec 2011 10:42:17 -0800 From: Steve Kargl <sgk@troutmask.apl.washington.edu> To: Ryan Stone <rysto32@gmail.com> Cc: freebsd-current@freebsd.org, Lyndon Nerenberg <lyndon@orthanc.ca>, Chris Rees <utisoft@gmail.com> Subject: Re: WITHOUT_PROFILE=yes by default Message-ID: <20111202184217.GA3911@troutmask.apl.washington.edu> In-Reply-To: <CAFMmRNxHzjOVogH4EyAmXqVJ1kTL6tqghTVujtBhkvAQT2hkTw@mail.gmail.com> References: <4ED8776F.9060301@FreeBSD.org> <20111202072349.GA89183@troutmask.apl.washington.edu> <20111202083501.GA73959@dragon.NUXI.org> <CADe0-4nj=ZvfPrT=9=m9hQhsADn9--5VFoAxTncGasQQTZN=0g@mail.gmail.com> <alpine.OSX.1.10.1112020746330.91234@peregrin.orthanc.ca> <CAFMmRNxeP_AEQ11jLJ8NCZmEHyxoeg4Z%2Bb6zJbETC8-S7nqhrQ@mail.gmail.com> <alpine.OSX.1.10.1112020852270.91234@peregrin.orthanc.ca> <CADLo83-ERuprd%2B1GmHrzJqhN5yBokQP7ObswZ4rS0W79Q7nJng@mail.gmail.com> <alpine.OSX.1.10.1112020857250.91234@peregrin.orthanc.ca> <CAFMmRNxHzjOVogH4EyAmXqVJ1kTL6tqghTVujtBhkvAQT2hkTw@mail.gmail.com>
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On Fri, Dec 02, 2011 at 01:12:42PM -0500, Ryan Stone wrote: > On Fri, Dec 2, 2011 at 12:07 PM, Lyndon Nerenberg <lyndon@orthanc.ca> wrote: > > No, these days 'obsolete' seems to mean 'it does not have a sexy > > Flash-driven web GUI.' > > In this case, 'obsolete' means it's a difficult-to-use tool that > requires recompiling your application, can't be used in production, > doesn't work when shared libraries are in the picture, offers > limited-to-no visibility into the underlying reasons why a particular > code path is a hotspot and introduces large measurement errors Difficult to use? % gfortran -o ang -pg ang.f90 % ./ang % gprof -b -l ./ang ang.gmon | more ... % cumulative self self total time seconds seconds calls ms/call ms/call name 35.0 0.01 0.01 0 100.00% _write [1] 33.3 0.02 0.01 0 100.00% _mcount [2] 15.0 0.02 0.00 1080 0.00 0.00 arena_purge [4] 5.6 0.02 0.00 0 100.00% .mcount (40) 2.2 0.02 0.00 29600 0.00 0.00 __quorem_D2A [8] 1.7 0.02 0.00 1080 0.00 0.00 __dtoa [7] 1.1 0.02 0.00 29552 0.00 0.00 __multadd_D2A [13] 1.1 0.02 0.00 7557 0.00 0.00 memcpy [12] Please show me how you would get the same information with pmcstat (or other tools) in the base system. Note, ang.f90 is a toy app I had lying around, which completes in a second or 2. If you want a non-toy example, I'll happily run one of my libm testcase for you. -- Steve
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