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But… what's the difference between nohz_full and tickless? The article mentions tickless as a means of avoiding clock ticks and then ignores it for the rest of
by colanderman 13y ago
But… what's the difference between nohz_full and tickless? The article mentions tickless as a means of avoiding clock ticks and then ignores it for the rest of the article.
- nwmcsween 13y agotickless is a lie, the kernel still requires periodic ticks for house keeping, nohz_full is completely tickless on all except one physical cpu (default: cpu0) that does house keeping.
- colanderman 13y agoAh, I didn't know that. Thanks!
- jeremyeder 13y agoHi guys, thanks for the feedback. I updated the blog post to include a table comparing different versions of RHEL, along with tick behavior you should expect (keys off nr_running).
- nkurz 13y agoHi Jeremy. The articles on your blog are great. I wandered across this one while trying to figure out the best practice for isolating a core to reduce variability when benchmarking CPU intensive tasks. Your tickless explanation helped a lot. Hope you stick around HN. Thanks!