Date: Tue, 25 Nov 2014 06:40:47 +0000 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Warner Losh <imp@bsdimp.com> Cc: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no>, Mark R V Murray <mark@grondar.org>, Ian Lepore <ian@FreeBSD.org>, arch@freebsd.org Subject: Re: svn commit: r274739 - head/sys/mips/conf Message-ID: <90678.1416897647@critter.freebsd.dk> In-Reply-To: <4C2BD093-BEA2-47F9-B575-90342712E9B2@bsdimp.com> References: <201411200552.sAK5qnXP063073@svn.freebsd.org> <20141120084832.GE24601@funkthat.com> <AE8F2D30-7F91-4C90-B79A-D99857D8AED8@grondar.org> <20141121092245.GI99957@funkthat.com> <1416582989.1147.250.camel@revolution.hippie.lan> <026FEB8A-CA8C-472F-A8E4-DA3D0AC44B34@grondar.org> <1416596266.1147.290.camel@revolution.hippie.lan> <F017033A-B761-4435-A7F8-264D2F4662A0@grondar.org> <1416598889.1147.297.camel@revolution.hippie.lan> <86egsvueqk.fsf@nine.des.no> <1416691274.1147.339.camel@revolution.hippie.lan> <398A380D-49AF-480C-8842-8835F81EF641@grondar.org> <1416806894.1147.362.camel@revolution.hippie.lan> <18B8A926-59C0-49B4-ADA3-A11688609852@grondar.org> <1416841268.1147.386.camel@revolution.hippie.lan> <CC6B67E1-55A2-4952-AB43-5F6C787F629B@grondar.org> <86wq6k9okk.fsf@nine.des.no> <4C2BD093-BEA2-47F9-B575-90342712E9B2@bsdimp.com>
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-------- In message <4C2BD093-BEA2-47F9-B575-90342712E9B2@bsdimp.com>, Warner Losh = writes: >What's the minimum specs required for get_cyclecount()? In randomness context: That there exists a complex and unpredictable cache-hierarchy which makes the exact number of cycles for any one instruction pseudo-random. Apart from x86 and zSeries no currently relevant architecture has that. -- = Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe = Never attribute to malice what can adequately be explained by incompetence= .
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