TWAS-1 Cluster Architecture and Capabilities

Overview

The TWAS-1 Cluster is tightly controlled and reserved as Educational, high-performance computing (HPC) resource. It is sometimes tailored for compute-intensive scientific research, data analytics, and numerical modeling. The system is deployed similar to the QUEVEDO Cluster configuration and is optimized to exploit modern Intel server-class processor features.

See TWAS-1 Ganglia Dashboard by Grid -> --Choose a Source (Click on Choose a Source and select twas1).

Access and Resource Governance

Access to the TWAS-1 Cluster is highly restricted, ensuring predictable performance and efficient allocation to approved research projects. Regular maintenance and data hygiene policies are enforced to preserve system integrity and long-term reliability. Unauthorized access will suggests a cybersecurity breach.

Compute Architecture

The TWAS-1 Cluster consists of three compute nodes, each powered by dual Intel® Xeon® Gold 5218R processors, delivering the following capabilities:

80 logical CPUs per node
- 2 sockets × 20 cores per socket × 2 threads (Hyper-Threading)
NUMA-aware architecture
- Two NUMA nodes per system, enabling memory-locality–optimized parallel workloads
92 GB DDR4 RAM per node
- Well suited for memory-intensive simulations and in-memory analytics

Advanced Instruction Set Support

The CPUs expose a comprehensive set of modern instruction extensions, enabling high efficiency across a wide range of scientific and data-driven workloads.

Vectorization & Floating-Point Performance

SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2
AVX, AVX2, and full AVX-512 support:
- AVX-512F, DQ, CD, BW, VL
AVX-512 VNNI for accelerated deep learning inference and mixed-precision workloads
FMA (Fused Multiply-Add) and F16C for optimized numerical kernels

Cryptography & Security Acceleration

AES-NI, PCLMULQDQ, RDRAND, RDSEED, ADX
Hardware-level mitigations for speculative execution vulnerabilities:
- IBRS, STIBP, SSBD, MD_CLEAR
NX (No-Execute) and SMEP/SMAP for robust memory protection

Virtualization and Isolation

The cluster supports advanced virtualization and isolation features, enabling flexible and secure execution environments:

Intel VT-x with EPT and VPID for efficient virtual machines and containerized workloads
Flexible privilege management via PKU/OSPKE
Hardware support for secure multi-tenant execution where required

Cache and Memory Hierarchy

To sustain high throughput and reduce memory latency, the system provides:

Per-core L1 instruction and data caches (32 KB each)
1 MB L2 cache per core
~28 MB shared L3 cache per socket
Cache Allocation Technology (CAT) and Memory Bandwidth Allocation (MBA) for fine-grained resource control across workloads

Performance Monitoring and Optimization

The TWAS-1 Cluster provides extensive observability and tuning capabilities:

Architectural performance monitoring:
- arch_perfmon, PEBS, Intel PT
Constant and invariant TSC for precise timing
NUMA topology awareness for scalable MPI and OpenMP applications

Intended Use Cases

Thanks to its instruction-rich CPUs and balanced memory design, the TWAS-1 Cluster is particularly well suited for:

Large-scale numerical simulations (climate, physics, engineering)
Machine learning inference and vectorized analytics
High-throughput data processing and statistical modeling
Virtualized or containerized scientific environments

Notable Scientific Computing Applications

QUANTUM ESPRESSO
GROMACS
LAMMPS
CP2K
ORCA
FALL3D