Date: Thu, 30 Oct 2008 21:58:39 +0000 (UTC) From: Robert Watson <rwatson@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/security/audit audit_pipe.c Message-ID: <200810302158.m9ULwiIL022401@repoman.freebsd.org>
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rwatson 2008-10-30 21:58:39 UTC FreeBSD src repository Modified files: sys/security/audit audit_pipe.c Log: SVN rev 184488 on 2008-10-30 21:58:39Z by rwatson Break out single audit_pipe_mtx into two types of locks: a global rwlock protecting the list of audit pipes, and a per-pipe mutex protecting the queue. Likewise, replace the single global condition variable used to signal delivery of a record to one or more pipes, and add a per-pipe condition variable to avoid spurious wakeups when event subscriptions differ across multiple pipes. This slightly increases the cost of delivering to audit pipes, but should reduce lock contention in the presence of multiple readers as only the per-pipe lock is required to read from a pipe, as well as avoid overheading when different pipes are used in different ways. MFC after: 2 months Sponsored by: Apple, Inc. Revision Changes Path 1.19 +127 -83 src/sys/security/audit/audit_pipe.c
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