I used to do all my Linux profiling with gprof.

However, with my multi-threaded application, it's output appears to be inconsistent.

Now, I dug this up. However, it's from a long time ago and in my gprof output, it appears my gprof is listing functions used by non-main threads.

So, my questions are:

1. In 2010, can I easily use gprof to profile multi-threaded Linux C++ applications? (Ubuntu 9.10)
2. What other tools should I look into for profiling?