Browsing by Author "Llort, German"
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Analyzing the efficiency of hybrid codes
Giménez Lucas, Judit; Mercadal, Estanislao; Llort, German; Méndez, Sandra (Institute of Electrical and Electronics Engineers (IEEE), 2020)
Conference report
Open AccessHybrid parallelization may be the only path for most codes to use HPC systems on a very large scale. Even within a small scale, with an increasing number of cores per node, combining MPI with some shared memory thread-based ... -
Automating the application data placement in hybrid memory systems
Servat, Harald; Peña, Antonio J.; Llort, German; Mercadal, Estanislao; Hoppe, Hans-Christian; Labarta Mancho, Jesús José (Institute of Electrical and Electronics Engineers (IEEE), 2017)
Conference report
Open AccessMulti-tiered memory systems, such as those based on Intel® Xeon Phi™processors, are equipped with several memory tiers with different characteristics including, among others, capacity, access latency, bandwidth, energy ... -
Bio-inspired call-stack reconstruction for performance analysis
Servat, Harald; Llort, German; González, Juan; Giménez Lucas, Judit; Labarta Mancho, Jesús José (Institute of Electrical and Electronics Engineers (IEEE), 2016)
Conference report
Open AccessThe correlation of performance bottlenecks and their associated source code has become a cornerstone of performance analysis. It allows understanding why the efficiency of an application falls behind the computer's peak ... -
Framework for a productive performance optimization
Servat, Harald; Llort, German; Huck, Kevin A.; Giménez Lucas, Judit; Labarta Mancho, Jesús José (2013-08)
Article
Restricted access - publisher's policyModern supercomputers deliver large computational power, but it is difficult for an application to exploit such power. One factor that limits the application performance is the single node performance. While many performance ... -
Large-memory nodes for energy efficient high-performance computing
Živanovič, Darko; Radulović, Milan; Llort, German; Zaragoza, David; Strassburg, Janko; Carpenter, Paul Matthew; Radojković, Petar; Ayguadé Parra, Eduard (Association for Computing Machinery (ACM), 2016)
Conference report
Open AccessEnergy consumption is by far the most important contributor to HPC cluster operational costs, and it accounts for a significant share of the total cost of ownership. Advanced energy-saving techniques in HPC components have ... -
The secrets of the accelerators unveiled: tracing heterogeneous executions through OMPT
Llort, German; Filgueras Izquierdo, Antonio; Jiménez-González, Daniel; Servat, Harald; Teruel, Xavier; Mercadal, Estanislao; Álvarez, Carlos; Giménez, Judit; Martorell Bofill, Xavier; Ayguadé Parra, Eduard; Labarta Mancho, Jesús José (Springer, 2016)
Conference report
Restricted access - publisher's policyHeterogeneous systems are an important trend in the future of supercomputers, yet they can be hard to program and developers still lack powerful tools to gain understanding about how well their accelerated codes perform ...