On Thu, 4 Feb 2021 16:31:36 +0100 SeongJae Park <sjpark@xxxxxxxxxx> wrote: > From: SeongJae Park <sjpark@xxxxxxxxx> [...] > > Introduction > ============ > > DAMON is a data access monitoring framework for the Linux kernel. The core > mechanisms of DAMON called 'region based sampling' and 'adaptive regions > adjustment' (refer to 'mechanisms.rst' in the 11th patch of this patchset for > the detail) make it > > - accurate (The monitored information is useful for DRAM level memory > management. It might not appropriate for Cache-level accuracy, though.), > - light-weight (The monitoring overhead is low enough to be applied online > while making no impact on the performance of the target workloads.), and > - scalable (the upper-bound of the instrumentation overhead is controllable > regardless of the size of target workloads.). > > Using this framework, therefore, several memory management mechanisms such as > reclamation and THP can be optimized to aware real data access patterns. > Experimental access pattern aware memory management optimization works that > incurring high instrumentation overhead will be able to have another try. > > Though DAMON is for kernel subsystems, it can be easily exposed to the user > space by writing a DAMON-wrapper kernel subsystem. Then, user space users who > have some special workloads will be able to write personalized tools or > applications for deeper understanding and specialized optimizations of their > systems. > [...] > > Baseline and Complete Git Trees > =============================== > > The patches are based on the v5.10. You can also clone the complete git > tree: > > $ git clone git://github.com/sjp38/linux -b damon/patches/v24 > > The web is also available: > https://github.com/sjp38/linux/releases/tag/damon/patches/v24 > > There are a couple of trees for entire DAMON patchset series. It includes > future features. The first one[1] contains the changes for latest release, > while the other one[2] contains the changes for next release. > > [1] https://github.com/sjp38/linux/tree/damon/master > [2] https://github.com/sjp38/linux/tree/damon/next For people who prefer LTS kernels, I decided to maintain two more trees that repectively based on latest two LTS kernels and contains backports of the latest 'damon/master' tree, as below. Please use those if you want to test DAMON but using LTS. - For v5.4.y: https://github.com/sjp38/linux/tree/damon/for-v5.4.y - For v5.10.y: https://github.com/sjp38/linux/tree/damon/for-v5.10.y Thanks, SeongJae Park
