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Broken Performance Tools [pdf] (brendangregg.com)
74 points by lelf on Nov 24, 2015 | hide | past | favorite | 9 comments


In case hackernews traffic brings down my website: http://www.slideshare.net/brendangregg/qcon-2015-broken-perf...


Where is the video of this talk? Slides are only half the story.



The video of the presentation is currently available for qcon sf attendees only: http://www.infoq.com/conferences/qconsf2015

The videos are released publicly over time...


One of the criticisms of "top" is that it clears the screen and you cannot turn this off. "top -b" works fairly well for this.


ah, thanks, I forgot about this. Although it doesn't quite do what I want: I want it to truncate to the screen (like normal top), and just print the next summary without clearing the screen. That way you'd use it like normal top, but in case you wanted scroll back it'd be there.


I just run it in its own terminal.


You do need to know what you are doing when doing benchmarking. Doesn't mean that ~100% of benchmarks are wrong.


They're almost always not able to be replicated, and measuring something almost always skews the results!

Check out gnn's talk on this tooled towards networking in FreeBSD

https://www.youtube.com/watch?v=9BcdRHNTdf4




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