From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.3 (2019-12-06) on atuin.qyliss.net X-Spam-Level: X-Spam-Status: No, score=-4.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RCVD_IN_DNSWL_LOW, SPF_HELO_PASS autolearn=unavailable autolearn_force=no version=3.4.3 Received: by atuin.qyliss.net (Postfix, from userid 496) id B5AA52A0EB; Wed, 18 Nov 2020 12:45:31 +0000 (UTC) Received: from [127.0.0.1] (localhost [IPv6:::1]) by atuin.qyliss.net (Postfix) with ESMTP id 53E452A0D1; Wed, 18 Nov 2020 12:45:23 +0000 (UTC) Received: by atuin.qyliss.net (Postfix, from userid 496) id 926A62A0BD; Wed, 18 Nov 2020 12:45:20 +0000 (UTC) Received: from smtp3.mail.ru (smtp3.mail.ru [94.100.179.58]) by atuin.qyliss.net (Postfix) with ESMTPS id AA1B029FD4 for ; Wed, 18 Nov 2020 12:45:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mail.ru; s=mail3; h=Message-Id:Content-type:Mime-Version:REFERENCES:IN-REPLY-TO:Reply-To:Subject:Cc:To:From:Date:From:Subject:Content-Type:Content-Transfer-Encoding:To:Cc; bh=qohrjCFh8ct6rq5xEjgIKpqp5pDrcE6WNcrEBmgIbPs=; b=Ecj52WO/S5saLNxbiPzr1QUFolYCTrh4aeawI1zAQoPQHC38+wrZJfi6rT6+LUqiSvvC2qBSOSC5SLEAlqC0loSD2aGndxNMfrOc1SHeFyD+qE1Jv+W6rU99IEJN9UVQKy7fQUdNO9xlQDVuceEGfKhbboXp/YiMNi+mccT/pS0=; Received: by smtp3.mail.ru with esmtpa (envelope-from <7c6f434c@mail.ru>) id 1kfMpm-00022p-U5; Wed, 18 Nov 2020 15:45:15 +0300 Date: Wed, 18 Nov 2020 13:52:17 +0100 From: Michael Raskin <7c6f434c@mail.ru> To: hi@alyssa.is, devel@spectrum-os.org Subject: [PATCH www] design.html: backpedal a bit on POWER9 X-Mailer: cl-smtp (SBCL 2.0.8.nixos) IN-REPLY-TO: <20201118120116.21390-1-hi@alyssa.is> REFERENCES: (<20201118120116.21390-1-hi@alyssa.is> . <20201118120116.21390-1-hi@alyssa.is> ) Mime-Version: 1.0 Content-type: text/plain; charset="UTF-8" Message-Id: Authentication-Results: smtp3.mail.ru; auth=pass smtp.auth=7c6f434c@mail.ru smtp.mailfrom=7c6f434c@mail.ru X-7564579A: 646B95376F6C166E X-77F55803: 4F1203BC0FB41BD911112A01BCD94C879E3DB60184CD496767AF80642FF42120182A05F538085040D81F326CDCB1FA8A50E696D07360B799228304BFD69B4D5DBDD195A828ED3253 X-7FA49CB5: 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 X-B7AD71C0: 14C14B24D00AF5AC321EF223B8115265C77432E3705FE0C78E1CD14B953EB46D09E7E3B62772F096355D89D7DBCDD132 X-C8649E89: 2B0D3889FB6FECDD0C840C87D7469CD88B998981EA245526249E670B3D6E3D6E1B4F34DBC1B5415F X-D57D3AED: 3ZO7eAau8CL7WIMRKs4sN3D3tLDjz0dLbV79QFUyzQ2Ujvy7cMT6pYYqY16iZVKkSc3dCLJ7zSJH7+u4VD18S7Vl4ZUrpaVfd2+vE6kuoey4m4VkSEu530nj6fImhcD4MUrOEAnl0W826KZ9Q+tr5ycPtXkTV4k65bRjmOUUP8cvGozZ33TWg5HZplvhhXbhDGzqmQDTd6OAevLeAnq3Ra9uf7zvY2zzsIhlcp/Y7m53TZgf2aB4JOg4gkr2bioj5ydGCopCJZtkMyG4mbXhFw== X-Mailru-Sender: A682F7DD9AD981BB4387D53265802FF4995EBDED44E73C21DFA7457C214B48D3A53BECF14B6D0792C449D830281D7835C77752E0C033A69EC3F51D8AFC1961D9D25F0A8BD79F64FE3453F38A29522196 X-Mras: Ok Message-ID-Hash: DZMLP7SICDXO3FZLCMCXN5PEEIMAVOA2 X-Message-ID-Hash: DZMLP7SICDXO3FZLCMCXN5PEEIMAVOA2 X-MailFrom: 7c6f434c@mail.ru X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-config-1; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; suspicious-header CC: mm@m-squa.red X-Mailman-Version: 3.3.1 Precedence: list Reply-To: 7c6f434c@mail.ru List-Id: Patches and low-level development discussion Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: >Supporting POWER9 isn't going to be as easy as I'd initially hoped. >This patch aims to explain that there are blockers that I'd need help >overcoming to be able to support it, even though I'd still like to. > >I don't want to be promising anything I can't deliver on, and I now >know that it's very unlikely I'll be able to deliver on this without >help. I wonder whether it is still correct to imply that Aarch64 is not comparable in performance. It does look even worse than x86_64 from transparency point of view, though. Do I understand correctly that none of rust-vmm versions support POWER9?