It's hard to know which 'note' refers to which reference. Here's my attempt to figure that out. On Tue, Feb 02, 2021 at 01:57:15AM -0700, Yu Zhao wrote: > Versatility > =========== > Userspace can trigger aging and eviction independently via the > ``debugfs`` interface [note]_ for working set estimation, proactive 1. `Long-term SLOs for reclaimed cloud computing resources <https://research.google/pubs/pub43017/>`_ > reclaim, far memory tiering, NUMA-aware job scheduling, etc. The > metrics from the interface are easily interpretable, which allows > intuitive provisioning and discoveries like the Borg example above. > For a warehouse-scale computer, the interface is intended to be a > building block of a closed-loop control system, with a machine > learning algorithm being the controller. > > Simplicity > ========== > The workflow [note]_ is well defined and each step in it has a clear 2. `Profiling a warehouse-scale computer <https://research.google/pubs/pub44271/>`_ > meaning. There are no magic numbers or heuristics involved but a few > basic data structures that have negligible memory footprint. This > simplicity has served us well as the scale and the diversity of our > workloads constantly grow. [...] > FAQ > === > What is the motivation for this work? > ------------------------------------- > In our case, DRAM is a major factor in total cost of ownership, and > improving memory overcommit brings a high return on investment. > Moreover, Google-Wide Profiling has been observing the high CPU > overhead [note]_ from page reclaim. 3. `Evaluation of NUMA-Aware Scheduling in Warehouse-Scale Clusters <https://research.google/pubs/pub48329/>`_ > Why not try to improve the existing code? > ----------------------------------------- > We have tried but concluded the two limiting factors [note]_ in the 4. `Software-defined far memory in warehouse-scale computers <https://research.google/pubs/pub48551/>`_ > existing code are fundamental, and therefore changes made atop them > will not result in substantial gains on any of the aspects above. > > What particular workloads does it help? > --------------------------------------- > This work optimizes page reclaim for workloads that are not IO bound, > because we find they are the norm on servers and clients in the cloud > era. It would most likely help any workloads that share the common > characteristics [note]_ we observed. 5. `Borg: the Next Generation <https://research.google/pubs/pub49065/>`_
