[cfe-dev] Alternative to -pg for clang?

[Daniel Dunbar]

If you can stand the performance penalty, cachegrind + kcachegrind are
also available and can produce some very detailed information.

 - Daniel

On Sun, Sep 26, 2010 at 6:55 PM, Matt Joiner <anacrolix at gmail.com> wrote:
> Thanks for the pointers, I was hoping very much for something other
> than the usual recommendations of "Zoom" and "OProfile". I'll give
> these profilers you've suggested a try.
>
> On Mon, Sep 27, 2010 at 1:00 AM, Reid Kleckner <reid.kleckner at gmail.com> wrote:
>> Don't know about a plan for -pg, but since I've been evaluating Linux
>> profiling tools for a class recently, I'll give some recommendations.
>>
>> If you're using Linux, I'd recommend "perf" (aka "Linux Perf Events"
>> or "Linux Performance Counters", names that are un-google-able).  The
>> command line interface is *much* easier to use than oprofile for
>> performance counters, which is what I was interested in.  I think the
>> callgraph support is a bit weaker than gprof.  It handled recursion
>> *very* poorly, which is pretty lame.  The main things to like about it
>> are the interface, low overhead, and the fact that you don't need to
>> rebuild.
>>
>> There's also google-perftools cpuprofiler:
>> http://google-perftools.googlecode.com/svn/trunk/doc/cpuprofile.html
>> I've only used their heap profiler, which worked reasonably well.
>> Google uses this for everything apparently, so it's probably not half
>> bad.
>>
>> Reid
>>
>> On Sun, Sep 26, 2010 at 7:36 AM, Matt Joiner <anacrolix at gmail.com> wrote:
>>> I observed there is no implementation of -pg for clang. Is there any
>>> plan to do this, or an alternative framework in place? Can anyone
>>> recommend an alternative free and effective sampling profiler with
>>> minimal overhead?
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>>
>
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