Dear List Members, We would like to announce the initial version of oprofile callgraph support on the MIPS architecture. Our implementation requires no user space changes to oprofile, only a few kernel patches need to be applied. In this first version we provide kernel patches for the 2.6.32 version, but we intend to update the patches to the latest kernel version to submit the patches into the mainline kernel. We also intend to provide a version for the Honeycomb (3.0) Android kernels. The current version was mostly tested with MIPS Android, running the Froyo release (2.2). We tested the implementation on Sigma Designs 8654 and ViXS XCode 4210 platforms, running in little endian mode. One interesting property of our callgraph implementation is that it does not require the presence of frame pointers. This way there is no need to recompile production binaries or kernels with frame pointers enabled. One may simply compile oprofile as a module, and enable it on demand, even on production builds. We also added a way to restrict the callgraph generation to kernel space / user space, if desired. This way the overhead of callgraph generation may be reduced. The home page also provides a few sample callgraphs created using kcachegrind from the oprofile data. You may download the code and access the documentation on the following URL: http://oss.homejinni.com/redmine/projects/mips-oprofile Best Regards, Gergely
