9-11 September 2019
Europe/Lisbon timezone

Regressions due CPU cache issues and missed visibility in Linux/kernel instrumentation

11 Sep 2019, 13:12
10m
Jade/room-I&II (Corinthia Hotel Lisbon)

Jade/room-I&II

Corinthia Hotel Lisbon

160

Speaker

Mr Pawel OLCHAWA

Description

all MT apps are extremely sensible to CPU cache issues, and MySQL/InnoDB is part of them.. Several times we observed significant regressions (up to 40% and more) due CPU cache miss or simple cache sync due concurrent access to the same variable by several threads, and all "perf" CPU related stats did not show any difference.. Any plans to address it with more deep CPU stats instrumentation?

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