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identity=mailfrom; envelope-from="steve@quintile.net"; helo=mx1.mythic-beasts.com; client-ip=46.235.224.141 Received: from mx1.mythic-beasts.com (mx1.mythic-beasts.com [46.235.224.141]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by tb-mx1.topicbox.com (Postfix) with ESMTPS for <9fans@9fans.net>; Tue, 29 Aug 2023 02:21:45 -0400 (EDT) (envelope-from steve@quintile.net) Received: by mailhub-cam-d.mythic-beasts.com with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1qas6h-008Twk-Rk for 9fans@9fans.net; Tue, 29 Aug 2023 07:21:44 +0100 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable From: Steve Simon Mime-Version: 1.0 (1.0) Subject: Re: [9fans] Plan9 multi-core support Date: Tue, 29 Aug 2023 07:21:30 +0100 Message-Id: <432BC782-2860-4931-B865-E3FC94ED8BEC@quintile.net> References: In-Reply-To: To: 9fans <9fans@9fans.net> X-Mailer: iPhone Mail (20G75) X-BlackCat-Spam-Score: 4 Topicbox-Policy-Reasoning: allow: sender is a member Topicbox-Message-UUID: 583ded12-4634-11ee-b492-b7198363e149 Archived-At: =?UTF-8?B?PGh0dHBzOi8vOWZhbnMudG9waWNib3guY29tL2dyb3Vwcy85?= =?UTF-8?B?ZmFucy9UOTEyZTQ4MzhjYjFhMzcxZi1NNTEwMzA3ZjNhMmQwOTczNmU1YTkx?= =?UTF-8?B?MDM4Pg==?= List-Help: List-Id: "9fans" <9fans.9fans.net> List-Post: List-Software: Topicbox v0 List-Subscribe: Precedence: list Reply-To: 9fans <9fans@9fans.net> List-Unsubscribe: , Topicbox-Delivery-ID: 2:9fans:437d30aa-c441-11e9-8a57-d036212d11b0:522be890-2105-11eb-b15e-8d699134e1fa:M510307f3a2d09736e5a91038:1:Q0CXP6pVrdh_3RWRHGTYu0RymgVEKitEGOa_YFZr6cE there was a vax compiler and i think a vax kenfs implementation, i don=E2= =80=99t know if there was a vax cpu/auth kernel. quite possibly not. currently i can only find my own post on tuhs confirming the vax was a dead= end. but i am sure jmk told me he found a vax compiler binary in the labs = dump. i think vaxes where becoming rather pass=C3=A9 by the time plan9 was born. -Steve > On 28 Aug 2023, at 7:21 pm, Kurt H Maier via 9fans <9fans@9fans.net> wrot= e: >=20 > =EF=BB=BFOn Mon, Aug 28, 2023 at 12:32:55PM +0000, G B via 9fans wrote: >> Windows and Linux began on single-core single processor machines. Multip= rocessor had been around for some time--IBM's System 360 began using multi-= processors in 1968--but not for x86. Plan 9 first edition came out in 1992,= at a time when multicore didn't exist, and multicore was released with IBM= 's Power 4 in 2001.=20 >> I can see why someone would ask if Plan 9 supports multicore. Plan 9 3rd= edition was released in 2000 and 4th edition was released in 2002. In each= case, going from single core-single processor to multiprocessor and then f= rom multiprocessor to multicore would require changes in the operating syst= em to recognize the extra processors and then the cores. >=20 > Symmetric multiprocessing was available in 1992, even on x86 > machines. Multics, tops-10, and various unixes all supported it by then. > Once you have shared-memory SMP there's little difference between > multiprocessor and multicore. Plan 9's implementation is imo cleaner > than most of what came before, but by 1992 there was a lot of > multiprocessing going on in the world. >=20 > khm ------------------------------------------ 9fans: 9fans Permalink: https://9fans.topicbox.com/groups/9fans/T912e4838cb1a371f-M51030= 7f3a2d09736e5a91038 Delivery options: https://9fans.topicbox.com/groups/9fans/subscription