Date: Thu, 6 Sep 2018 03:02:29 +0300 From: Lev Serebryakov <lev@FreeBSD.org> To: Benjamin Kaduk <kaduk@mit.edu> Cc: Cy Schubert <Cy.Schubert@cschubert.com>, Eric van Gyzen <eric@vangyzen.net>, FreeBSD Current <freebsd-current@FreeBSD.org>, "freebsd-hackers@freebsd.org" <freebsd-hackers@FreeBSD.org> Subject: Re: Celeron J3160 with enabled Turbo mode stays at 480MHz(lowestsetting) forever and can not lower frequency without Tuebo mode Message-ID: <499689041.20180906030229@serebryakov.spb.ru> In-Reply-To: <20180905223246.GH73164@kduck.kaduk.org> References: <20180905145219.6593F83F@spqr.komquats.com> <dc369aef-d50b-14ae-4cb2-23afd7ca5002@FreeBSD.org> <20180905223246.GH73164@kduck.kaduk.org>
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Hello Benjamin, Thursday, September 6, 2018, 1:32:46 AM, you wrote: >> > I don't think you need something accurate. >> Ok, here is results. I'm working in single-user mode. >> >> TL;DR "Turbo" mode make "openssl" much slower (x3.5)! >> >> I can not properly interpret this result. > You need to say more about what openssl is doing (i.e., how it was > configured, what architecture it's on, etc.). In particular, there > was for a time an AVX2 implementation for some primitives, that ended up > being a net loss, since heavy use of those instructions would cause > overheating and throttling. OpenSSL has a lot of custom assembly for these > common primitves, with some logic to select among them both at > configuration time and at runtime, so results such as this may or may not > be widely transferrable. It is system (very fresh ALPHA4) openssl, built with default settings. Simple single run with one thread, without AES-NI: openssl speed aes-256-cbc It is as simple as that. -- Best regards, Lev mailto:lev@FreeBSD.org
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