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out-of-order execution

3 articles · Page 1 of 1
IT Learning Made Simple
IT Learning Made Simple
Aug 22, 2026 · Fundamentals

Superscalar vs Superpipeline: The Hidden Tricks Accelerating CPUs

The article explains how superscalar pipelines execute multiple instructions per cycle and how superpipelines increase clock frequency by adding more stages, compares their trade‑offs, shows historical evolution, and describes how modern CPUs combine both techniques along with out‑of‑order execution to boost IPC while facing power and complexity challenges.

CPUIPCmicroarchitecture
0 likes · 9 min read
Superscalar vs Superpipeline: The Hidden Tricks Accelerating CPUs
OPPO Kernel Craftsman
OPPO Kernel Craftsman
Jun 16, 2025 · Fundamentals

Why Energy‑Aware Scheduling Falls Short: Inside CPU Frequency, Power Modeling, and Scheduler Limits

This article examines the challenges of Energy Aware Scheduling on big‑LITTLE CPUs, detailing how frequency prediction, power calculation, cache hierarchy, out‑of‑order execution, and branch prediction affect task placement decisions, and why the resulting models often remain inaccurate and unreliable.

CPU schedulingenergy aware schedulingfrequency prediction
0 likes · 14 min read
Why Energy‑Aware Scheduling Falls Short: Inside CPU Frequency, Power Modeling, and Scheduler Limits