--- title: "Case study: Measuring energy efficiency on the x64 platform" url: https://daily.dev/posts/case-study-measuring-energy-efficiency-on-the-x64-platform-9efnkr6ho source_url: https://developers.redhat.com/articles/2026/05/22/case-study-measuring-energy-efficiency-x64-platform type: article source: "Red Hat Developer" published: 2026-05-22T07:19:25.017Z updated: 2026-05-22T07:20:07.355Z tags: ["linux", "networking"] reading_time: 10 upvotes: 7 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Case study: Measuring energy efficiency on the x64 platform **[Red Hat Developer](https://daily.dev/sources/rhdev)** · 10 min read · 7 upvotes · 0 comments ## Summary A case study measuring throughput, CPU utilization, computational efficiency, and power consumption on a 32-core x64 server with a dual-port 100 GbE NIC. Using iperf3 with NUMA-aware pinning, single-core performance reached ~24 Gbps, while 8 parallel instances nearly saturated the 100 Gbps link. Scaling beyond 8 instances revealed a hidden NIC hardware bottleneck: an internal switch capped aggregate throughput at 100 Gbps across all ports, despite marketing materials omitting this limit. Power analysis shows CPU accounts for ~50% of total system draw, and system-level energy efficiency improves with higher parallelism even as per-core computational efficiency declines — a fundamental trade-off for server sizing decisions. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [NVIDIA Exemplar Cloud: Lessons for Unlocking Full Performance on AI Infrastructure](https://daily.dev/posts/nvidia-exemplar-cloud-lessons-for-unlocking-full-performance-on-ai-infrastructure-ulkfblfm0) · NVIDIA Developer · 0 upvotes · 0 comments - [VM tuning case study: Power & performance on AMD processors](https://daily.dev/posts/vm-tuning-case-study-power-performance-on-amd-processors-iztax6utd) · Red Hat Developer · 0 upvotes · 0 comments --- Tags: [#linux](https://daily.dev/tags/linux), [#networking](https://daily.dev/tags/networking) [View this post on daily.dev](https://daily.dev/posts/case-study-measuring-energy-efficiency-on-the-x64-platform-9efnkr6ho)