Systems Research Laboratory

Hybrid Memory

Low-energy and low-cost hybrid memory systems built out of small amount of RAM and large flash-based storage.

Participants

Meetings

02/25/11: Implementation update
02/03/11: Implementation update
12/02/10: Update on Linux HM implementation
11/10/10: More updates and alternative approaches to simulation optimizations
11/04/10: Updates on performance troubleshooting and New direction on 'store faults'?
11/02/10: Tracing hardware events initial implementation discussion and alternatives for dealing with high page fault I/O latencies in design (buy a Fusion-IO or OCZ card?)
10/21/10: Reviewing new method for memory traces, Alternatives for power computation
10/07/10: New approach for memory traces
09/30/10: Validation of QEMU traces using the follow benchmark and power calculations
09/23/10: Pre-eurosys meeting
09/16/10: Start of Eurosys submission discussion
05/06/10: Another Pre-OSDI meeting
05/04/10: Pre-OSDI meeting
05/03/10: Next tasks for Motivation and Evaluation sections
04/29/10: Debugging power numbers and memory bandwidth, and moving to flash power model
04/26/10: Motivation graphs and writing tasks and evaluation section updates.
04/22/10: Evaluation section - first round of graphs for latency, erasures.
04/19/10: Latency numbers and power computation issues
04/15/10: Brief discussion of power computations and writing plan
04/05/10: New results with SSD size = 4x mem-footprint and evaluation section plans
04/02/10: Evaluation section and QEMU trace timing bug
03/29/10: Plans for new experiments, SpecPower benchmark addition, and Stable state discussion
03/15/10: Discussion of cold bandwidth and spreadsheet data with Akshat
03/11/10: New spreadsheet data + Simulation accuracy and timing of replay modes
03/08/10: Latency CDFs for first round of experiments
02/18/10: Cold bandwidth numbers discussion
02/02/10: Synchronization issues with HM implementation
01/26/10: Motivation graph formats and Padding discussion
01/15/10: Plan for OSDI submission
12/10/09: Cost-based replacement scrapped - looking at alternatives: CFLRU, ARC, and CFARC
12/03/09: Page-fault w/ cost-based replacement + bandwidth for cold data redone
11/25/09: Miscellaneous discussion
11/19/09: Memory trace processing, new mobile traces, emulator bug
11/12/09: Resolving emulator inefficiencies and power model data needed
11/09/09: Flushing timer and measuring memory latencies
11/05/09: Timing accurate replay in emulator
11/02/09: Graphs for motivation
10/29/09: Replacement algorithm revision, phases and other motivation data
10/26/09: Motivation beyond flashcache - separation of anonymous and page-cache references
10/15/09: QEMU tracing optimizations, prototype design issues, power models, etc.
10/08/09: Update on Prototype, QEMU tracing, and MICRON memory power models discussion
10/02/09: Performance counters Power6 and Opteron for memory traces
10/01/09: Luis comments for paper
09/03/09: More PTLSim issues
08/31/09: Simulator/Emulator design issues and PTLSim updates
08/24/09: Paper comments
08/20/09: Paper comments and writing plan
08/17/09: Simulator overview discussion, PTLSim issues
08/06/09: Draft comments from Luis
08/03/09: PTLSim slowdown, steady-state-only simulation, emulation setup ideas
07/30/09: Using page-reference bits, motivation graphs
07/27/09: Discussion of benchmarks and motivation graph 1
07/23/09: Discussion of motivation graphs and effect of missing DMA
07/20/09: Paper restructuring and taxonomy of design alternatives
07/16/09: Details of cost-benefit approach for cleaning and padding
07/13/09: Comments on segment selection (change of terminology)
07/09/09: New thoughts on locality-aware flushing and refining segment selection
07/06/09: PTLSim updates, ideas on segment selection
07/02/09: Page Replacement candidate formalization
06/29/09: PLTSim updates, Paper feedback from Luis
06/25/09: Brief design discussion and Old QEMU success
06/22/09: Paper outline, brief design, and identifying simulator
06/18/09: Possibilities for memory access traces
06/15/09: Requirements of development / advantages with QEMU and OSes other than Linux
06/11/09: Discussion of evaluation methods, alternate (MTD-based) architecture/devices, allocation and replacement for VM

Table of Contents

Hybrid Memory

Participants

Meetings