Latency Distributions and Micro-Benchmarking to Identify and Characterize Kernel Hotspots

Latency Distributions and Micro-Benchmarking to Identify and Characterize Kernel Hotspots

Explore kernel hotspots and performance bottlenecks in large-scale systems through a conference talk that delves into latency distributions and micro-benchmarking techniques. Learn how to identify and characterize OS scale limits across various operating systems, including AIX, Linux, and Solaris. Discover case studies highlighting issues with SysV semaphores, shared memory, UNIX domain sockets, and task cloning. Gain insights into developing fixes and workarounds for these performance constraints, and understand the importance of complementing modern tracing facilities with focused micro-benchmarks. Examine the challenges of running bare metal hardware with many cores and terabytes of main memory, and the impact on system scalability.