Name		Name	Last commit message	Last commit date
parent directory ..
Alignment		Alignment
AllineaMAP		AllineaMAP
Branching		Branching
Cppcheck		Cppcheck
Fdo		Fdo
GalleryProcessorCacheEffects		GalleryProcessorCacheEffects
README.md		README.md
broadwell_cpuinfo.txt		broadwell_cpuinfo.txt
broadwell_meminfo.txt		broadwell_meminfo.txt
broadwell_memspecs.txt		broadwell_memspecs.txt
broadwell_mlc.txt		broadwell_mlc.txt
cascadelake_mlc_avx512.txt		cascadelake_mlc_avx512.txt
haswell_cpuinfo.txt		haswell_cpuinfo.txt
haswell_meminfo.txt		haswell_meminfo.txt
haswell_memspecs.txt		haswell_memspecs.txt
haswell_mlc.txt		haswell_mlc.txt
hpc_efficiency.pptx		hpc_efficiency.pptx
ivybridge_cpuinfo.txt		ivybridge_cpuinfo.txt
ivybridge_meminfo.txt		ivybridge_meminfo.txt
ivybridge_memspecs.txt		ivybridge_memspecs.txt
ivybridge_mlc.txt		ivybridge_mlc.txt
skylake_breniac_mlc_avx512.txt		skylake_breniac_mlc_avx512.txt
skylake_cpuinfo.txt		skylake_cpuinfo.txt
skylake_lscpu.txt		skylake_lscpu.txt
skylake_meminfo.txt		skylake_meminfo.txt
skylake_mlc.txt		skylake_mlc.txt

README.md

Optimization

Needless to say that optimization is a rather important topic in HPC.

A collection of code samples that illustrate opportunities for code optimization, or highlight potential performance bottlenecks.

This section of the repository has been superceeded by a training repository on code optimization.

Branching: branching instructions can decrease performance.
Fdo: small illustration of using FDO (Feedback Directed Optimization).
GalleryProcessorCacheEffects: C implementations of the code examples given in Igor Ostrovsky's interesting blog post on effects the various caching mechanisms in a modern CPU can have on performance. See the following URL for his original post: http://igoro.com/archive/gallery-of-processor-cache-effects/
hpc_efficiency.pptx: slides on a number of aspects related to efficiency in HPC. Scaling is discussed, as well as various aspects of hardware properties that influence performance.