PACT '95 Proceedings of the IFIP WG10.3 working conference on Parallel architectures and compilation techniques
Speculative multithreaded processors
ICS '98 Proceedings of the 12th international conference on Supercomputing
ICS '98 Proceedings of the 12th international conference on Supercomputing
Simultaneous subordinate microthreading (SSMT)
ISCA '99 Proceedings of the 26th annual international symposium on Computer architecture
A scalable approach to thread-level speculation
Proceedings of the 27th annual international symposium on Computer architecture
Transient fault detection via simultaneous multithreading
Proceedings of the 27th annual international symposium on Computer architecture
Detailed design and evaluation of redundant multithreading alternatives
ISCA '02 Proceedings of the 29th annual international symposium on Computer architecture
Computer
IEEE Micro
Slipstream Execution Mode for CMP-Based Multiprocessors
HPCA '03 Proceedings of the 9th International Symposium on High-Performance Computer Architecture
In Search of Speculative Thread-Level Parallelism
PACT '99 Proceedings of the 1999 International Conference on Parallel Architectures and Compilation Techniques
Memory resource management in VMware ESX server
OSDI '02 Proceedings of the 5th symposium on Operating systems design and implementationCopyright restrictions prevent ACM from being able to make the PDFs for this conference available for downloading
Hardware support for spin management in overcommitted virtual machines
Proceedings of the 15th international conference on Parallel architectures and compilation techniques
Linux Device Drivers, 3rd Edition
Linux Device Drivers, 3rd Edition
Core fusion: accommodating software diversity in chip multiprocessors
Proceedings of the 34th annual international symposium on Computer architecture
Configurable isolation: building high availability systems with commodity multi-core processors
Proceedings of the 34th annual international symposium on Computer architecture
Mixed-mode multicore reliability
Proceedings of the 14th international conference on Architectural support for programming languages and operating systems
Dynamic heterogeneity and the need for multicore virtualization
ACM SIGOPS Operating Systems Review
Helios: heterogeneous multiprocessing with satellite kernels
Proceedings of the ACM SIGOPS 22nd symposium on Operating systems principles
Evaluation of the Intel® Core i7 Turbo Boost feature
IISWC '09 Proceedings of the 2009 IEEE International Symposium on Workload Characterization (IISWC)
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The rise of multicore processors has lead to techniques that dynamically vary the set and characteristics of cores or threads available to the operating system. For example, Core Fusion merges multiple cores for faster processing. While the mechanics of the change, such as merging two cores into a more powerful core, can be handled by a virtualization layer, operating systems still have an interest in the exact set of cores available. For example, the read-copy-update mechanism in Linux must contact all cores to complete an update. Thus, the OS must be informed when the set of CPUs changes. We demonstrate through an analysis of a recent Linux kernel that (i) there are over 15 subsystems - each subsystem can have multiple callbacks registered - that depend on knowing the set of cores, and (ii) the existing hotplug mechanism is poorly suited to handling dynamic processors due to its poor performance and scalability. Based on this analysis, we propose two mechanisms, processor proxies and parallel and deferred hotplug to provide low-latency reconfiguration. In initial experiments, we show that we can reduce the latency of reconfiguration in Linux by 95 percent.