VTUNE-like Profiling Tools for Unix?

Milo_Mindbender asks: "I'm working on a rather large scale C++ graphics/networking project under Linux and am really missing having a low level code profiler like Intel's VTUNE available. In particular, I am looking for the ability to profile not just CPU use, but using the CPU performance counters to profile stuff like L1/L2 cache misses, pipeline stalls...etc. The other VTUNE capability I'm missing is the way it profiles the whole system, so the profile includes time spent in drivers, OS and everything else along with your program's profile. Has anyone seen anything like this for Linux? I hear Intel is working on VTUNE for Linux but they don't seem to have released anything yet."