36 citations · 149 across the 13 of their papers we have counts for
7 papers · 1 filter
Understanding HPC Benchmark Performance on Intel Broadwell and Cascade Lake Processors
Christie L. Alappat, Johannes Hofmann, Georg Hager +3
Hardware platforms in high performance computing are constantly getting more complex to handle even when considering multicore CPUs alone. Numerous features and configuration optio…
Automated Instruction Stream Throughput Prediction for Intel and AMD Microarchitectures
Jan Laukemann, Julian Hammer, Johannes Hofmann +2
An accurate prediction of scheduling and execution of instruction streams is a necessary prerequisite for predicting the in-core performance behavior of throughput-bound loop kerne…
On the accuracy and usefulness of analytic energy models for contemporary multicore processors
Johannes Hofmann, Georg Hager, Dietmar Fey
This paper presents refinements to the execution-cache-memory performance model and a previously published power model for multicore processors. The combination of both enables a v…
An analysis of core- and chip-level architectural features in four generations of Intel server processors
Johannes Hofmann, Georg Hager, Gerhard Wellein +1
This paper presents a survey of architectural features among four generations of Intel server processors (Sandy Bridge, Ivy Bridge, Haswell, and Broad- well) with a focus on perfor…
An ECM-based energy-efficiency optimization approach for bandwidth-limited streaming kernels on recent Intel Xeon processors
Johannes Hofmann, Dietmar Fey
We investigate an approach that uses low-level analysis and the execution-cache-memory (ECM) performance model in combination with tuning of hardware parameters to lower energy req…
Performance analysis of the Kahan-enhanced scalar product on current multi- and manycore processors
Johannes Hofmann, Dietmar Fey, Michael Riedmann +3
We investigate the performance characteristics of a numerically enhanced scalar product (dot) kernel loop that uses the Kahan algorithm to compensate for numerical errors, and desc…
Performance analysis of the Kahan-enhanced scalar product on current multicore processors
Johannes Hofmann, Dietmar Fey, Jan Eitzinger +2
We investigate the performance characteristics of a numerically enhanced scalar product (dot) kernel loop that uses the Kahan algorithm to compensate for numerical errors, and desc…