Relevant bibliographies by topics / Superpage support

Academic literature on the topic 'Superpage support'

Author: Grafiati
Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "Superpage support"

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Park, Cheol Ho, and Daeyeon Park. "Aggressive superpage support with the shadow memory and the partial-subblock TLB." Microprocessors and Microsystems 25, no. 7 (October 2001): 329–42. http://dx.doi.org/10.1016/s0141-9331(01)00125-9.

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Navarro, Juan, Sitararn Iyer, Peter Druschel, and Alan Cox. "Practical, transparent operating system support for superpages." ACM SIGOPS Operating Systems Review 36, SI (December 31, 2002): 89–104. http://dx.doi.org/10.1145/844128.844138.

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Talluri, Madhusudhan, and Mark D. Hill. "Surpassing the TLB performance of superpages with less operating system support." ACM SIGPLAN Notices 29, no. 11 (November 1994): 171–82. http://dx.doi.org/10.1145/195470.195531.

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Talluri, Madhusudhan, and Mark D. Hill. "Surpassing the TLB performance of superpages with less operating system support." ACM SIGOPS Operating Systems Review 28, no. 5 (December 1994): 171–82. http://dx.doi.org/10.1145/381792.195531.

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Ali Hussain, Ghassan M., Mohammed A. G. Abdulaziz, Zheng N. Xiang, and Mohammed A. Al-Hammadi. "Asphalt Binder Performance Grading for the Republic of Yemen Based on Superpave Asphalt Mix-Design." Open Civil Engineering Journal 14, no. 1 (December 23, 2020): 365–79. http://dx.doi.org/10.2174/1874149502014010365.

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Background: The asphalt binder is considered a temperature-sensitive viscoelastic material. Temperature can cause some common distress of asphalt pavement, such as rutting (permanent deformation), which correlated with high-temperature environments, and thermal cracking, which correlated with low-temperature environments. Objective: This study aimed to establish asphalt binder Performance Grades (PGs) in the Yemeni region to ensure that the asphalt pavement design can effectively resist the distresses of rutting and cracking that occurred due to seasonal temperature changes. Methods: In order to determine the performance grades, the temperature zoning was performed by obtaining the last 10 years temperature data of 19 cities in Yemen gathered by the Yemeni Meteorological Authority. The collected data were analyzed based on the trend and statistical reliability. Three air-pavement temperature prediction models of Superpave, LTPP, and Oman model were used to predict air pavement temperatures. The local performance grades were computed using reliability levels of 50% and 98%. Since the dependent variables of latitude in the Superpave equation can more reflect the geographical locations of Yemeni regions rather than the other models, this study strongly approved the SHARP Superpave model to be used to determine the performance grades. Results: Based on the Superpave model with reliability analyses, performance grade maps were drawn. The most common performance grades recommended in this study for low traffic volume roads were PG64-10, and PG52-10. Conclusion: The findings of this study are highly significant and provide valuable decision support for pavement management and improve the transportation system in the Republic of Yemen.
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Liu, Ai Qing, Jian Zhang, Peng Cheng, and Yu Hai Zhang. "Numerical Simulation on the Effect of Compound Roof Separation Position on Bolting Performance." Advanced Materials Research 953-954 (June 2014): 1638–42. http://dx.doi.org/10.4028/www.scientific.net/amr.953-954.1638.

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Prestress is a key parameter in bolting, while the cohesive force of layers in the compound roof strata is low and prone to separation, causing the prestress proliferation very poor. With the method of numerical simulation analysis,the location of separation in compound roof to affect the performance of bolting support was researched. It is concluded the roof separation in the edge of anchorage zone, the prestress field superpose, but is away from the deep surrounding rock and shows poor stability,however the role of cable can make up for the defect of rockbolts support. It has been found the highly prestressed strength bolting system adapts to the compound roof.
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Hall, Kevin D., Satish K. Dandu, and Gary V. Gowda. "Effect of Specimen Size on Compaction and Volumetric Properties in Gyratory Compacted Hot-Mix Asphalt Concrete Specimens." Transportation Research Record: Journal of the Transportation Research Board 1545, no. 1 (January 1996): 126–32. http://dx.doi.org/10.1177/0361198196154500117.

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Gyratory compaction is the centerpiece of the Strategic Highway Research Program asphalt mixture design procedure Superpave. A number of factors could potentially affect the behavior of asphalt mixes in the gyratory compactor. One of these is specimen size. Four specimen sizes each of one unmodified and two rubber-modified hot-mix asphalt concrete mixes were compacted in the Superpave gyratory compactor to determine the effect of specimen size on compaction and volumetric properties of the mixes. All specimens were compacted using a 150-mm-diameter mold. Specimens of each of the mix types were prepared using three gradations and three binder contents. Densification curves and plotting number of gyrations versus percent of theoretical maximum density were developed for each mix type/gradation/binder content combination. A strong trend in the densification data was observed, in which curves representing specimen sizes of 3500, 5000, and 6500 g were grouped together, apart from the curve representing a 2000-g specimen size. This trend, the grouping of larger specimen data apart from small specimen data, was also observed in volumetric data (optimum asphalt content, voids in mineral aggregate, and voids filled with asphalt). These trends were observed in most of the mix type/ gradation/binder content combinations. The data presented suggest that for specimens of sufficient size, for example, greater than 3500 g, specimen size does not significantly affect the volumetric or compaction properties of hot mix specimens, which supports the ruggedness of the gyratory compaction procedure.
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Singh, Amit, Ivan Li, Otto Hannuksela, Tjonnie Li, and Kyungmin Kim. "Classifying Lensed Gravitational Waves in the Geometrical Optics Limit with Machine Learning." American Journal of Undergraduate Research 16, no. 2 (September 30, 2019): 5–16. http://dx.doi.org/10.33697/ajur.2019.019.

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Gravitational waves are theorized to be gravitationally lensed when they propagate near massive objects. Such lensing effects cause potentially detectable repeated gravitational wave patterns in ground- and space-based gravitational wave detectors. These effects are difficult to discriminate when the lens is small and the repeated patterns superpose. Traditionally, matched filtering techniques are used to identify gravitational-wave signals, but we instead aim to utilize machine learning techniques to achieve this. In this work, we implement supervised machine learning classifiers (support vector machine, random forest, multi-layer perceptron) to discriminate such lensing patterns in gravitational wave data. We train classifiers with spectrograms of both lensed and unlensed waves using both point-mass and singular isothermal sphere lens models. As the result, classifiers return F1 scores ranging from 0:852 to 0:996, with precisions from 0:917 to 0:992 and recalls ranging from 0:796 to 1:000 depending on the type of classifier and lensing model used. This supports the idea that machine learning classifiers are able to correctly determine lensed gravitational wave signals. This also suggests that in the future, machine learning classifiers may be used as a possible alternative to identify lensed gravitational wave events and to allow us to study gravitational wave sources and massive astronomical objects through further analysis. KEYWORDS: Gravitational Waves; Gravitational Lensing; Geometrical Optics; Machine Learning; Classification; Support Vector Machine; Random Tree Forest; Multi-layer Perceptron
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Alas, Mustafa, Sani Isah Abba, Shaban Ismael Albrka Ali, Abdur Rahim, and Nur Izzi Md Yusoff. "Evaluating the Performance of Aluminum Oxide Nanoparticle-Modified Asphalt Binder and Modelling the Viscoelastic Properties by Using Artificial Neural Networks and Support Vector Machines." Advances in Materials Science and Engineering 2022 (November 22, 2022): 1–11. http://dx.doi.org/10.1155/2022/9685454.

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The effect of aluminum oxide nanoparticles (Al2O3) on the 60/70 penetration of asphalt cement (AC) was investigated in terms of the physical and rheological characteristics by using the Superpave testing procedures. Al2O3 at 3, 5, and 7% concentrations were blended with 60/70 penetration of grade AC. Conventional testing procedures were adopted regarding the physical characteristics, while dynamic shear rheometer (DSR) testing procedures were conducted to evaluate the high and low temperature failure parameters. In addition, heuristic modelling techniques, artificial neural networks (ANN), and support vector machines (SVM) were employed to predict the performance characteristics of AC by using the mechanical testing conditions. The frequency sweep test and multiple stress creep recovery (MSCR) test results revealed that the optimum composition of Al2O3 was at 5% concentration considering the high temperature performance characteristics since further addition of the Al2O3 resulted in degradation in the enhanced properties due to agglomeration of the nanoparticles in the blend. On the contrary, Al2O3 5% demonstrated the lowest viscoelastic behavior at intermediate temperatures. The higher complex modulus ( G ∗ ) and lower phase angle ( δ ) parameters indicated that the increase in stiffness due to the modification process was at the cost of losing elastic properties against fatigue cracking. Moreover, based on the statistical performance indicator, coefficient of determination (R2), it was observed that the ANN models for predicting G ∗ and δ achieved a prediction accuracy of 0.989 and 0.911 while SVM models were able to achieve 0.984 and 0.929, respectively, considering the training datasets. On the other hand, it was noted that SVM models outperformed the ANN models in terms of a smaller gap between the results obtained from the training and testing datasets. The difference between the training and testing datasets for G ∗ and δ parameters for the SVM models were 3.2% and 6.8% while for the ANN models, the differences were 11.6% and 9.5%, respectively, indicating that the ANN models were more prone to the overfitting phenomenon.
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Kabir, M. Sharear, William King, Christopher Abadie, Patrick Icenogle, and Samuel B. Cooper. "Louisiana's Experience with Open-Graded Friction Course Mixtures." Transportation Research Record: Journal of the Transportation Research Board 2295, no. 1 (January 2012): 63–71. http://dx.doi.org/10.3141/2295-08.

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The Louisiana Department of Transportation and Development (DOTD) began developing open-graded friction course (OGFC) mixtures in the late 1960s and early 1970s. Then, in the late 1980s, a moratorium was imposed on their use because of some early failure issues. However, OGFC mixture performance and service life have improved significantly since a new generation of OGFC mixture was promoted in the United States in the late 1990s. Inspired by the success of other state agencies, the Louisiana DOTD modified the earlier mix design and constructed four new OGFC sections during the past decade to evaluate pavement performance and safety benefits. This paper includes a comprehensive evaluation of Louisiana OGFC mixtures based on their laboratory and field performance. Laboratory work entailed material and mixture design in addition to numerous laboratory tests, namely permeability, draindown, tensile strength ratio, and loaded wheel test. Field evaluation involved visual inspection, pavement condition survey, skid resistance, and traffic safety. With few exceptions in the laboratory, the selected OGFC mixtures showed the potential to meet current Louisiana DOTD specifications, as well as various performance standards established by previous studies. The field analysis indicated that the OGFC test sections showed improved rutting, cracking, and skid performance when compared with typical Superpave® roadway sections. This performance evaluation will likely support the ongoing use of OGFC mixtures in the state of Louisiana. Additionally, the evaluation provides an opportunity to continually improve the current OGFC specification and mix design procedures adopted by the Louisiana DOTD.
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Dissertations / Theses on the topic "Superpage support"

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Wienand, Ian Raymond Computer Science &amp Engineering Faculty of Engineering UNSW. "Transparent large-page support for Itanium linux." Publisher:University of New South Wales. Computer Science & Engineering, 2008. http://handle.unsw.edu.au/1959.4/41021.

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The abstraction provided by virtual memory is central to the operation of modern operating systems. Making the most efficient use of the available translation hardware is critical to achieving high performance. The multiple page-size support provided by almost all architectures promises considerable benefits but poses a number of implementation challenges. This thesis presents a minimally-invasive approach to transparent multiple page-size support for Itanium Linux. In particular, it examines the interaction between supporting large pages and Itanium's two inbuilt hardware page-table walkers; one being a virtual linear page-table with limited support for storing different page-size translations and the other a more flexible but higher overhead hash table based translation cache. Compared to a single-page-size kernel, a range of benchmarks show performance improvements when multiple page-sizes are available, generally large working sets that stress the TLB. However, other benchmarks are negatively impacted. Analysis shows that the increased TLB coverage, resulting from the use of large pages, frequently does not reduce TLB miss rates sufficiently to make up for the increased cost of TLB reloads. These results, which are specific to the Itanium architecture, suggest that large-page support for Itanium Linux is best enabled selectively with insight into application behaviour.
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Navarro, Juan E. "Transparent operating system support for superpages." Thesis, 2004. http://hdl.handle.net/1911/18674.

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This dissertation presents the design, implementation and evaluation of a physical memory management system that allows applications to transparently benefit from superpages. The benefit consists of fewer TLB misses and the consequent performance improvement, which is shown to be significant. The size of main memory in workstations has been growing exponentially over the past decade. As a cause or consequence, the working set size of typical applications has been increasing at a similar rate. In contrast, the TLB size has remained small because it is usually fully associative and its access time must be kept low since it is in the critical path to every memory access. As a result, the relative TLB coverage---that is, the fraction of main memory that can be mapped without incurring TLB misses---has decreased by a factor of 100 in the last 10 years. Because of this disparity, many modern applications incur a large number of TLB misses, degrading performance by as much as 30% to 60%, as opposed to the 4--5% degradation reported in the 80's or the 5--10% reported in the 90's. To increase the TLB coverage without increasing the TLB size, most modern processors support memory pages of large sizes, called superpages . Since each superpage requires only one entry in the TLB to map a large region of memory, superpages can dramatically increase TLB coverage and consequently improve performance. However, supporting superpages poses several challenges to the operating system, in terms of superpage allocation, promotion trade-offs, and fragmentation control. This dissertation analyzes these issues and presents a design of an effective superpage management system. An evaluation of the design is conducted through a prototype implementation for the Alpha CPU, showing substantial and sustained performance benefits. The design is then validated and further refined through an implementation for the Itanium processor. The main contribution of this work is that it offers a complete and practical solution for transparently providing superpages to applications. It is complete because it tackles all the issues and trade-offs in realizing the potential of superpages. It is practical because it can be implemented with localized changes to the memory management subsystem, it minimizes the negative impact that could be observed in pathological cases, and can therefore be readily integrated into any general-purpose operating system.
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Book chapters on the topic "Superpage support"

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Gorman, Mel, and Patrick Healy. "Performance Characteristics of Explicit Superpage Support." In Computer Architecture, 293–310. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-24322-6_24.

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Conference papers on the topic "Superpage support"

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Gorman, Mel, and Patrick Healy. "Supporting superpage allocation without additional hardware support." In the 7th international symposium. New York, New York, USA: ACM Press, 2008. http://dx.doi.org/10.1145/1375634.1375641.

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Qu, Ning, Yansong Zheng, Wei Cao, and Xu Cheng. "GISP: A Transparent Superpage Support Framework for Linux." In 2007 IEEE International Conf. on Application-specific Systems, Architectures and Processors. IEEE, 2007. http://dx.doi.org/10.1109/asap.2007.4459290.

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Navarro, Juan, Sitaram Iyer, Peter Druschel, and Alan Cox. "Practical, transparent operating system support for superpages." In the 5th symposium. New York, New York, USA: ACM Press, 2002. http://dx.doi.org/10.1145/1060289.1060299.

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Talluri, Madhusudhan, and Mark D. Hill. "Surpassing the TLB performance of superpages with less operating system support." In the sixth international conference. New York, New York, USA: ACM Press, 1994. http://dx.doi.org/10.1145/195473.195531.

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Chatterjee, Avimita. "Formulating Support for Superpages to reduce the number of TLB Faults in Contiguous Virtual Memory Space." In 2019 IEEE 10th Annual Ubiquitous Computing, Electronics & Mobile Communication Conference (UEMCON). IEEE, 2019. http://dx.doi.org/10.1109/uemcon47517.2019.8993035.

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Bouzit, Djamel, and Christophe Pierre. "Localization of Vibration in Disordered Multi-Span Beams With Damping." In ASME 1993 Design Technical Conferences. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/detc1993-0166.

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Abstract The combined effects of disorder and structural damping on the dynamics of a multi-span beam with slight randomness in the spacing between supports are investigated. A wave transfer matrix approach is chosen to calculate the free and forced harmonic responses of this nearly periodic structure. It is shown that both harmonic waves and normal modes of vibration that extend throughout the ordered, undamped beam become spatially attenuated if either small damping or small disorder is present in the system. The physical mechanism which causes this attenuation, however, is one of energy dissipation in the case of damping but one of energy confinement in the case of disorder. The corresponding rates of spatial exponential decay are estimated by applying statistical perturbation methods. It is found that the effects of damping and disorder simply superpose for a multi-span beam with strong interspan coupling, but interact less trivially in the weak coupling case. Furthermore, the effect of disorder is found to be small relative to that of damping in the case of strong interspan coupling, but of comparable magnitude for weak coupling between spans. The adequacy of the statistical analysis to predict accurately localization in finite disordered beams with boundary conditions is also examined.
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Graikos, Dimitrios, Hui Tang, Carl M. Sangan, Gary D. Lock, and James A. Scobie. "A New Interpretation of Hot Gas Ingress Through Turbine Rim Seals Influenced by Mainstream Annulus Swirl." In ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/gt2022-82430.

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Abstract Rim seals are fitted at the periphery of the stator and rotor discs to reduce the adverse effects of hot gas ingress on highly stressed turbine components limited by temperature. Ingress is induced by rotational effects such as disc pumping, as well as by asymmetric pressure-driven unsteady phenomena. These influences superpose to form a complex flow-physics problem that is a challenge for computational fluid dynamics. Engine designers typically use practical low-order models that require empirical validation and correlating parameters. This paper identifies the swirl ratio in the mainstream annulus as a dominant characterising parameter to predict ingress. This is a new interpretation that is supported by extending a low-order model based on turbulent transport using an effective eddy mixing length based on the difference in swirl between the annulus and seal clearance. Experimental measurements were made using a 1.5-stage turbine rig at low Reynolds number. The influence of annulus swirl ratio was investigated over a range of flow conditions and two rim-seal geometries, with the ingress quantified using CO2 tracer concentration in the sealing flow. The concentration data were complemented by measurements in the annulus using a five-hole aerodynamic probe.
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Prieto, Javier, and Lorena Rodríguez-Gallego. "Proyecto de evaluación ambiental de configuraciones urbano territoriales en el área de amortiguación del paisaje protegido Laguna de Rocha." In Seminario Internacional de Investigación en Urbanismo. Barcelona: Instituto de Arte Americano. Universidad de Buenos Aires, 2013. http://dx.doi.org/10.5821/siiu.5928.

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El bienestar humano y la sostenibilidad ambiental dependen del correcto manejo de los ecosistemas. Los responsables del uso del territorio deben comprender que los cambios de políticas y prácticas de manejo ambiental producen múltiples efectos en estos. La Laguna de Rocha ingresó al Sistema Nacional de Áreas Protegidas como Paisaje Protegido con el objetivo de conservar el funcionamiento eco sistémico y las interacciones entre ser humano y naturaleza. Sobre el área de amortiguación se superpone el Plan Local de Ordenamiento Territorial Lagunas Costeras, el cual pretende regular las inmensas presiones económicas por el uso del suelo, promoviendo la urbanización y cuadriplicando la superficie posible de construir. Con el objetivo de transformar amenazas en oportunidades mediante urbanizaciones sostenibles, el proyecto busca analizar el comportamiento de configuraciones urbano-territoriales, evaluando la sostenibilidad y compatibilidad con la implementación del área protegida, seleccionando aquellas que minimicen el impacto en el paisaje y el funcionamiento natural del sistema, habilitando el desarrollo urbano-turístico. Human welfare and environmental sustainability depends on proper ecosystem management. Responsible land use should realize that politics changes and environmental management practices produce multiple effects on these. Laguna de Rocha belongs to the National System of Protected Areas under the category of Protected Landscape in order to preserve the ecosystem functioning and the interactions between humans and nature. About the buffer zone overlaps the Coastal Lagoons Local Land Use Plan, aims to regulate the huge economic pressures by land use, promoting urbanization and quadrupling possible to construct surface. With the objective of transforming threats into opportunities through sustainable developments, the project aims to analyze the behavior of urban-territorial configurations, evaluating sustainability and support the implementation of the protected area, selecting those that minimize the impact on the landscape the natural functioning of the system, enabling urban-tourism development.
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