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www.brendangregg.com | ||
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blog.tanelpoder.com
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| | | | | TL;DR: Some Linux distros and even different kernel versions within a distro have disabled IRQ time accounting. In such case, your monitoring tools will report zero time spent in hardware interrupt handlers (shown as %hi, %irq, hiq, etc). It's easy to check how your kernel is behaving by looking at /proc/stat and you can still measure interrupt CPU usage using perf and a little creativity. Index Index Problem Explanation Kernel configuration options Measuring IRQ time with perf Different distros and kernel versions Summary Here's a reminder that your Linux kernel may be not breaking down hardware interrupt CPU usage separately in its /proc/stat CPU time reporting, depending on the kernel's compile-time settings. - Linux, Oracle, SQL performance tuning and troubleshooting - consulting & training. | |
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blog.jerometerry.com
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| | | | | Overview I've seen Brendan Gregg's talk on generating mixed-mode flame graphs and I wanted to reproduce those flamegraphs for myself. Set... | |
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linus.schreibt.jetzt
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vitonsky.net
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| | | We strive to ensure code quality with tests, static code typing, code analyzing, code review and documentation, but some of most popular programming languages like Typescript and Java kill interfaces as concept to describe contract of code. | ||
