It has been the better part of a decade since the last KernelShark article appeared here; in the
interim, the kernel-tracing visualization tool has undergone some major changes.
While the high-level appearance is largely similar, the underlying code
has switched from GTK+ 2.0 to Qt 5. On July 26,
maintainer Steven Rostedt announced
the release of KernelShark version 1.0, which makes it a good time to
take another peek.

Source: LWN.net – [$] KernelShark releases version 1.0