dev-util/sysprof
System-wide Linux Profiler
USE Flags
gtk
Global: Adds support for x11-libs/gtk+ (The GIMP Toolkit)
test
Global: Workaround to pull in packages needed to run with FEATURES=test. Portage-2.1.2 handles this internally, so don't set it in make.conf/package.use anymore
+unwind
* This flag is undocumented *