If appropriate for your use, VTune for Linux (and the rest of the Intel Compiler Suite) is available for free under a "Non-Commercial Software Development" license.
As far as I understand, having not used VTune, some basic features work on both, but the interesting stuff relies on Intel-specific counters in the CPU.
This doesn't mean it's worthless, though: Finding your performance bottlenecks on Intel will surely be at least a first-order approximation of the performance on AMD, too.
ARM is a little bit of a different story since the memory model is different, and you might be getting killed by something like unaligned accesses, but that doesn't mean the information is worthless; it just means you should probably use more than one tool. After all, not everything is a nail, but hammers are still good tools.
