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Improving fget() performance

Improving fget() performance

Posted May 7, 2019 19:55 UTC (Tue) by abatters (✭ supporter ✭, #6932)
In reply to: Improving fget() performance by willy
Parent article: Improving fget() performance

Instead of using non-sequential fds, how about indexing the table differently by shuffling the bits of the fd around before using it as an index, so that sequential fds don't share a cacheline?

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Improving fget() performance

Posted May 7, 2019 20:11 UTC (Tue) by willy (subscriber, #9762) [Link]

Nice idea. Unfortunately, the problem is not that fds are assigned to threads in some kind of round-robin order. They're assigned to threads in a semi-random order in an attempt to keep worker threads equally busy. Adding in a shuffle isn't going to help.


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