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

[Matt Joiner]

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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>