{"id":157676,"date":"2009-10-01T00:00:00","date_gmt":"2009-10-01T00:00:00","guid":{"rendered":"https:\/\/www.microsoft.com\/en-us\/research\/msr-research-item\/helios-heterogeneous-multiprocessing-with-satellite-kernels\/"},"modified":"2018-10-16T19:59:12","modified_gmt":"2018-10-17T02:59:12","slug":"helios-heterogeneous-multiprocessing-with-satellite-kernels","status":"publish","type":"msr-research-item","link":"https:\/\/www.microsoft.com\/en-us\/research\/publication\/helios-heterogeneous-multiprocessing-with-satellite-kernels\/","title":{"rendered":"Helios: Heterogeneous Multiprocessing with Satellite Kernels"},"content":{"rendered":"<div class=\"asset-content\">\n<p>Helios is an operating system designed to simplify the task of writing, deploying, and tuning applications for heterogeneous platforms. Helios introduces satellite kernels, which export a single, uniform set of OS abstractions across CPUs of disparate architectures and performance characteristics. Access to I\/O services such as \ufb01le systems are made transparent via remote message passing, which extends a standard microkernel message-passing abstraction to a satellite kernel infrastructure. Helios retargets applications to available ISAs by compiling froman intermediate language. To simplify deploying and tuning application performance, Helios exposes an af\ufb01nity metric to developers. Af\ufb01nity provides a hint to the operating system about whether a process would bene\ufb01t from executing on the same platform as a service it depends upon.<\/p>\n<p>We developed satellite kernels for an XScale programmable I\/O card and for cache-coherent NUMA architectures. We of\ufb02oaded several applications and operating system components, often by changing only a single line of metadata. We show up to a 28% performance improvement by of\ufb02oading tasks to the XScale I\/O card. On a mail-server benchmark, we show a 39% improvement in performance by automatically splitting the application among multiple NUMA domains.<\/p>\n<\/div>\n<p><!-- .asset-content --><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Helios is an operating system designed to simplify the task of writing, deploying, and tuning applications for heterogeneous platforms. Helios introduces satellite kernels, which export a single, uniform set of OS abstractions across CPUs of disparate architectures and performance characteristics. Access to I\/O services such as \ufb01le systems are made transparent via remote message passing, [&hellip;]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"msr-url-field":"","msr-podcast-episode":"","msrModifiedDate":"","msrModifiedDateEnabled":false,"ep_exclude_from_search":false,"footnotes":""},"msr-content-type":[3],"msr-research-highlight":[],"research-area":[13547],"msr-publication-type":[193716],"msr-product-type":[],"msr-focus-area":[],"msr-platform":[],"msr-download-source":[],"msr-locale":[268875],"msr-field-of-study":[],"msr-conference":[],"msr-journal":[],"msr-impact-theme":[],"msr-pillar":[],"class_list":["post-157676","msr-research-item","type-msr-research-item","status-publish","hentry","msr-research-area-systems-and-networking","msr-locale-en_us"],"msr_publishername":"Association for Computing Machinery, Inc.","msr_edition":"Proceedings of the 22nd Symposium on Operating Systems Principles (SOSP 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