https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=210098
Bug ID: 210098
Summary: Refine slightly search of highest priority thread on
the queue(sleepq_signal).
Product: Base System
Version: 11.0-CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Many People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Created attachment 171139
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=171139&action=edit
patch loop by eliminating otherwise redundant comparisons besttd against NULL.
File: kern/subr_sleepqueue.c
File revision: r300109
Slightly optimise searching of highest priority thread
on the queue by initializing besttd to first element on the tailq
and then iterating over sq_blocked[queue] starting from second element, thus
utilizing TAILQ_FOREACH_FROM. Also catch empty queue of blocked threads by
early testing besttd after first assignment.
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