@misc{NolteSchroederPreikschat, author = {Nolte, J{\"o}rg and Schr{\"o}der-Preikschat, Wolfgang}, title = {An Object-Oriented Computing Surface for Distributed Memory Architectures}, series = {Proceedings of the Twenty-Sixth Hawaii International Conference on System Sciences, Wailea, Hawaii on January 5 - 8, 1993, Vol. 2}, journal = {Proceedings of the Twenty-Sixth Hawaii International Conference on System Sciences, Wailea, Hawaii on January 5 - 8, 1993, Vol. 2}, publisher = {IEEE Computer Society Press}, address = {Los Alamitos, Calif.}, pages = {134 -- 143}, language = {en} } @inproceedings{NolteSchroederPreikschat, author = {Nolte, J{\"o}rg and Schr{\"o}der-Preikschat, Wolfgang}, title = {Modeling Replication and Placement in the PEACE Parallel Operating System - A Case for Dual Objects}, series = {Workshop on Dynamic Object Placement and Load Balancing in Parallel and Distributed Systems (ECOOP '92), Utrecht, Netherlands, June 1992}, booktitle = {Workshop on Dynamic Object Placement and Load Balancing in Parallel and Distributed Systems (ECOOP '92), Utrecht, Netherlands, June 1992}, pages = {6}, language = {en} } @inproceedings{NolteSchroederPreikschat, author = {Nolte, J{\"o}rg and Schr{\"o}der-Preikschat, Wolfgang}, title = {Dual Objects - An Object Model for Distributed System Programming}, series = {Proceedings of the 8th ACM SIGOPS European workshop on Support for composing distributed applications}, booktitle = {Proceedings of the 8th ACM SIGOPS European workshop on Support for composing distributed applications}, publisher = {ACM Digital Library}, address = {New York, NY}, pages = {261 -- 267}, language = {en} } @misc{CordsenNolteSchroederPreikschat, author = {Cordsen, J. and Nolte, J{\"o}rg and Schr{\"o}der-Preikschat, Wolfgang}, title = {Experiences Developing a Virtual Shared Memory System using Hig-Level Object Paradigms}, series = {Object oriented programming, 12th European conference, proceedings, ECOOP '98, Brussels, Belgium, July 20 - 24, 1998}, journal = {Object oriented programming, 12th European conference, proceedings, ECOOP '98, Brussels, Belgium, July 20 - 24, 1998}, publisher = {Springer}, address = {Berlin [u.a.]}, isbn = {3-540-64737-6}, pages = {285 -- 306}, language = {en} } @article{BuettnerNolteSchroederPreikschat, author = {B{\"u}ttner, L. and Nolte, J{\"o}rg and Schr{\"o}der-Preikschat, Wolfgang}, title = {ARTS of PEACE - A High-Performance Middleware Layer for Parallel and Disributed Computing}, language = {en} } @inproceedings{BergCordsenHeueretal., author = {Berg, R. and Cordsen, J. and Heuer, J. and Nolte, J{\"o}rg and Oestmann, B. and Sander, M. and Schmidt, Heiko and Sch{\"o}n, F. and Schr{\"o}der-Preikschat, Wolfgang}, title = {The PEACE Family of Distributed Operating Systems}, language = {en} } @inproceedings{BergCordsenHastedtetal., author = {Berg, R. and Cordsen, J. and Hastedt, Ch. and Heuer, J. and Nolte, J{\"o}rg and Sander, M. and Schmidt, Heiko and Sch{\"o}n, F. and Schr{\"o}der-Preikschat, Wolfgang}, title = {Making Massively Parallel Systems Work}, language = {en} } @inproceedings{HeuerNolteSanderetal., author = {Heuer, J. and Nolte, J{\"o}rg and Sander, M. and Sch{\"o}n, F. and Schr{\"o}der-Preikschat, Wolfgang}, title = {Making Massively Parallel Systems Fast}, language = {en} } @misc{NuernbergerDrescherRottaetal., author = {N{\"u}rnberger, Stefan and Drescher, Gabor and Rotta, Randolf and Nolte, J{\"o}rg and Schr{\"o}der-Preikschat, Wolfgang}, title = {Shared Memory in the Many-Core Age}, series = {Euro-Par 2014: Parallel Processing Workshops, Porto, 2014}, journal = {Euro-Par 2014: Parallel Processing Workshops, Porto, 2014}, publisher = {Springer International Publishing}, address = {Cham}, isbn = {978-3-319-14312-5}, doi = {10.1007/978-3-319-14313-2_30}, pages = {351 -- 362}, abstract = {With the evolution toward fast networks of many-core processors, the design assumptions at the basis of software-level distributed shared memory (DSM) systems change considerably. But efficient DSMs are needed because they can significantly simplify the implementation of complex distributed algorithms. This paper discusses implications of the many-core evolution and derives a set of reusable elementary operations for future software DSMs. These elementary operations will help in exploring and evaluating new memory models and consistency protocols.}, language = {en} } @misc{DudaNowakHartmannetal., author = {Duda, Niklas and Nowak, Thorsten and Hartmann, Markus and Schadhauser, Michael and Cassens, Bj{\"o}rn and W{\"a}gemann, Peter and Nabeel, Muhammad and Ripperger, Simon and Herbst, Sebastian and Meyer-Wegener, Klaus and Mayer, Frieder and Dressler, Falko and Schr{\"o}der-Preikschat, Wolfgang and Kapitza, R{\"u}diger and Robert, J{\"o}rg and Thielecke, J{\"o}rn and Weigel, Robert and K{\"o}lpin, Alexander}, title = {BATS: Adaptive Ultra Low Power Sensor Network for Animal Tracking}, series = {Sensors}, volume = {18}, journal = {Sensors}, number = {10}, issn = {1424-8220}, doi = {10.3390/s18103343}, pages = {34}, language = {en} } @misc{EichlerHofmeierReifetal., author = {Eichler, Christian and Hofmeier, Henriette and Reif, Stefan and H{\"o}nig, Timo and Nolte, J{\"o}rg and Schr{\"o}der-Preikschat, Wolfgang}, title = {Neverlast: Towards the Design und Implementation of the NVM-based Everlasting Operating System}, series = {Hawaii International Conference on System Sciences 2021 - HICSS-54}, journal = {Hawaii International Conference on System Sciences 2021 - HICSS-54}, publisher = {Scholarspace}, doi = {10.24251/HICSS.2021.870}, pages = {7227 -- 7236}, language = {en} } @misc{KoehlerHerzogHoenigetal., author = {K{\"o}hler, Sven and Herzog, Benedict and H{\"o}nig, Timo and Wenzel, Lukas and Plauth, Max and Nolte, J{\"o}rg and Polze, Andreas and Schr{\"o}der-Preikschat, Wolfgang}, title = {Pinpoint the Joules: Unifying Runtime-Support for Energy Measurements on Heterogeneous Systems}, series = {2020 IEEE/ACM International Workshop on Runtime and Operating Systems for Supercomputers (ROSS)}, volume = {1}, journal = {2020 IEEE/ACM International Workshop on Runtime and Operating Systems for Supercomputers (ROSS)}, publisher = {IEEE Xplore}, pages = {31 -- 40}, abstract = {For the design and operation of today's computer systems, power and energy requirements are highest priorities. Unlike performance analyses, however, power and energy measurements of heterogeneous systems are difficult to conduct. Especially at the system-software level, performing power and energy measurements remains challenging. Yet, such measurements are essential to improve software components for low power and high energy-efficiency.In this paper, we analyze and discuss the power and energy characteristics of several heterogeneous systems with up to 20 cores (160 hardware threads) and 1 TB of main memory. For the analyzed systems, we outline challenges regarding power and energy measurements and show ways to overcome limitations (i.e., sampling constraints). To improve the current state of the art in power and energy measurements at the system-software level, we present the design and implementation of PINPOINT, an energy-profiling tool which unifies different power and energy measurement interfaces.}, language = {en} } @misc{SchmausPfeifferHoenigetal., author = {Schmaus, Florian and Pfeiffer, Nicolas and H{\"o}nig, Timo and Nolte, J{\"o}rg and Schr{\"o}der-Preikschat, Wolfgang}, title = {Nowa: A Wait-Free Continuation-Stealing Concurrency Platform}, series = {2021 IEEE International Parallel and Distributed Processing Symposium (IPDPS)}, journal = {2021 IEEE International Parallel and Distributed Processing Symposium (IPDPS)}, publisher = {IEEE}, isbn = {978-1-6654-4066-0}, doi = {10.1109/IPDPS49936.2021.00044}, pages = {360 -- 371}, language = {en} } @misc{RabensteinNguyenGierschetal., author = {Rabenstein, Jonas and Nguyen, Dustin and Giersch, Oliver and Eichler, Christian and H{\"o}nig, Timo and Nolte, J{\"o}rg and Schr{\"o}der-Preikschat, Wolfgang}, title = {Back to the core-memory age: running operating systems in NVRAM only}, series = {Proceedings: architecture of computing systems: 36th International Conference, ARCS 2023, June 13 - 15, 2023}, journal = {Proceedings: architecture of computing systems: 36th International Conference, ARCS 2023, June 13 - 15, 2023}, editor = {Goumas, Georgios and Tomforde, Sven and Brehm, J{\"u}rgen and Wildermann, Stefan and Pionteck, Thilo}, publisher = {Springer-Verlag}, isbn = {978-3-031-42784-8}, doi = {10.1007/978-3-031-42785-5_11}, pages = {153 -- 167}, abstract = {The classic core memory was completely non-volatile and thus kept at least part of the operating system persistently in main memory, even over power cycles. Nowadays we can repeat this approach with NVRAM, but with terabytes of main memory on a completely different scale and with parts of the operating-system state stored in volatile CPU caches. In this paper, we discuss our experiences of running large modern operating systems including their applications entirely in NVRAM. We adapted stock Linux and FreeBSD kernels to work exclusively with NVRAM by hiding all DRAM from the kernels at boot time to establish a realistic performance baseline without changing anything else. Following this entirely NVRAM-agnostic approach, we could observe an effective performance penalty of a factor of about four, but only negligible increases in whole-system power draw. For our system with two CPU sockets and 56 cores total, we also observed a reduction in power draw in several scenarios. Due to prolonged execution times, the energy consumption increased as well for these measured workloads. While this might be discouraging at first sight, this result was achieved without any performance tuning as to the specific characteristics of today's NVRAM technology. Therefore, we are also discussing means to mitigate the observed shortcomings by integrating NVRAM appropriately into the memory hierarchy of future robust persistent systems.}, language = {en} } @misc{GierschNguyenNolteetal., author = {Giersch, Oliver and Nguyen, Dustin and Nolte, J{\"o}rg and Schr{\"o}der-Preikschat, Wolfgang}, title = {Virtual memory revisited for tiered memory}, series = {Proceedings of the 15th ACM SIGOPS Asia-Pacific Workshop on Systems}, journal = {Proceedings of the 15th ACM SIGOPS Asia-Pacific Workshop on Systems}, publisher = {ACM}, address = {New York, NY, USA}, isbn = {979-8-4007-1105-3}, doi = {10.1145/3678015.3680475}, pages = {1 -- 7}, abstract = {The landscape of memory technologies has grown substantially more diverse and heterogeneous, with a number of special-purpose memory technologies reaching market maturity in recent years, such as NVRAM (Non-Volatile Memory), HBM (High-Bandwidth Memory) or the upcoming CXL.mem. Future computing systems will have to contend with byte-addressable and cache-coherent main memory that is highly diverse, either in terms of the fundamental performance characteristics of its underlying memory technology, or due to the fact that CXL.mem will allow accessing homogenous but remote memory. The VM (Virtual Memory) subsystems of today have been empirically optimized over decades, but were designed for a single tier of main memory only. While recent approaches that integrated tiered memory have focused on better memory access metrics to improve page placement strategies, we seek to leverage the proven heuristics that are already in place. In times of high load we assign pages from slower memory, demote inactive pages according to standard page replacement strategies and use lazy page promotions when sufficient resources are available again to retain the inherently high reactivity of demand paging with regard to working set changes. We integrate these mechanisms into the VM subsystem of a full-featured mainstream operating system (FreeBSD) with minimal adaptations. The resulting multi-tier VM system runs in a stable and efficient manner under high stress even with highly unfavorable work loads.}, language = {en} }