Linux Kernel Sunburst

Sunburst belows shows the percentage of access from the top directory level to the file level.
When hovering through the sunburst, we can see the percentage of access which is the number of access (read / write / call / return / free) from a directory or file to other files divided by the total accesses from the parent direcotry.
The number of accesses comes from LTP and Phoronix test suite, we can tell how the components of kernel behave in these two test suites
By exploring the sunburst, it's easy to learn which part of the kernel has the most frequent accesses and which part has less accesses.
Note: When the ratio of a file or directory is too small, it is not shown on the graph.