Date: Fri, 18 Mar 2016 14:49:19 -0400 From: Ryan Stone <rysto32@gmail.com> To: John Baldwin <jhb@freebsd.org> Cc: Adrian Chadd <adrian.chadd@gmail.com>, Konstantin Belousov <kostikbel@gmail.com>, Stanislav Sedov <stas@freebsd.org>, "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org> Subject: Re: Peformance issues with r278325 Message-ID: <CAFMmRNz1PnzHDstZ4sgMs7aTgA_c0ydkxaFCi%2B8We6k3GG8wGw@mail.gmail.com> In-Reply-To: <3277812.DVsZx4uMun@ralph.baldwin.cx> References: <FA50A68E-7F3D-4361-8A8A-EB7F97EF3D00@FreeBSD.org> <8403291.NqUNo0Qq5W@ralph.baldwin.cx> <CAJ-VmonUdHRJ0jcFphqXi1w2PwbDycLG190Yd5z8JQWGxW_1iQ@mail.gmail.com> <3277812.DVsZx4uMun@ralph.baldwin.cx>
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On Fri, Mar 18, 2016 at 1:37 PM, John Baldwin <jhb@freebsd.org> wrote: > I think I'll likely just convert it to use a direct > TSC delay loop always in HEAD (assuming that verifies ok in testing as > well). > Couldn't that work incorrectly on VM guests? The tsc is not guaranteed to be monotonic in that environment.
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