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Date:      Thu, 04 Dec 2014 16:34:24 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-threads@FreeBSD.org
Subject:   [Bug 195098] pthread lock performance degradation on single CPU VM
Message-ID:  <bug-195098-16-sVnwYnK5NI@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-195098-16@https.bugs.freebsd.org/bugzilla/>
References:  <bug-195098-16@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=195098

Ed Maste <emaste@freebsd.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|pthread lock performance    |pthread lock performance
                   |degradation                 |degradation on single CPU
                   |                            |VM

--- Comment #2 from Ed Maste <emaste@freebsd.org> ---
Aha, I can reproduce this on a single-vCPU bhyve VM:

$ time ./test-once >/dev/null
        9.42 real         2.57 user         6.84 sys
$ time ./test-once >/dev/null
     4061.43 real       801.23 user      3256.45 sys

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