From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp0 ([2001:41d0:8:6d80::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by ms11 with LMTPS id aGf6OjIORGA6VAAA0tVLHw (envelope-from ) for ; Sat, 06 Mar 2021 23:20:18 +0000 Received: from aspmx1.migadu.com ([2001:41d0:8:6d80::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp0 with LMTPS id mAnNNjIORGDVUwAA1q6Kng (envelope-from ) for ; Sat, 06 Mar 2021 23:20:18 +0000 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by aspmx1.migadu.com (Postfix) with ESMTPS id 8114222B20 for ; Sun, 7 Mar 2021 00:20:18 +0100 (CET) Received: from localhost ([::1]:34430 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lIgDZ-0000jZ-JL for larch@yhetil.org; Sat, 06 Mar 2021 18:20:17 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:40060) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lIgDQ-0000jE-R0 for guix-devel@gnu.org; Sat, 06 Mar 2021 18:20:08 -0500 Received: from mail.zaclys.net ([178.33.93.72]:55359) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lIgDO-0006Sn-Az for guix-devel@gnu.org; Sat, 06 Mar 2021 18:20:08 -0500 Received: from guix-xps.local (82-64-145-38.subs.proxad.net [82.64.145.38]) (authenticated bits=0) by mail.zaclys.net (8.14.7/8.14.7) with ESMTP id 126NK2qU019622 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Sun, 7 Mar 2021 00:20:02 +0100 DMARC-Filter: OpenDMARC Filter v1.3.2 mail.zaclys.net 126NK2qU019622 Authentication-Results: mail.zaclys.net; spf=fail smtp.mailfrom=lle-bout@zaclys.net DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zaclys.net; s=default; t=1615072802; bh=ayJg7c76iaqLEMbmn2+UQfCtZr733TZrLHZdTiox/GQ=; h=Subject:From:To:Date:In-Reply-To:References:From; b=RPglERc5y9y7B2yP4kxCZSEYXWFFuMC4cPdEVGI8TrS+x7Qsw+s3VyJPsa0YJFXI0 i0NMLP2LG8kN4HSFlXGkPVWLyVrllpDVeYunRNeGBjTqN4zi5z/TxaofJRi4qMPp0j tLMCWeIwZ8q5hH1Ou5aWVv/rJsbYo91mqyzLqbao= Message-ID: <0de60501672d88b8014d2adb9b617c7576d40714.camel@zaclys.net> Subject: Re: Implications of QEMU binfmt transparent emulation for builds From: =?ISO-8859-1?Q?L=E9o?= Le Bouter To: Christopher Baines , guix-devel@gnu.org Date: Sun, 07 Mar 2021 00:19:44 +0100 In-Reply-To: <87eegsnexv.fsf@cbaines.net> References: <87eegsnexv.fsf@cbaines.net> Content-Type: multipart/signed; micalg="pgp-sha512"; protocol="application/pgp-signature"; boundary="=-SC25y89S11QJQPGzcomi" User-Agent: Evolution 3.34.2 MIME-Version: 1.0 Received-SPF: pass client-ip=178.33.93.72; envelope-from=lle-bout@zaclys.net; helo=mail.zaclys.net X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: guix-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-devel-bounces+larch=yhetil.org@gnu.org Sender: "Guix-devel" X-Migadu-Flow: FLOW_IN ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=yhetil.org; s=key1; t=1615072818; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:mime-version:mime-version: content-type:content-type:in-reply-to:in-reply-to: references:references:list-id:list-help:list-unsubscribe: list-subscribe:list-post:dkim-signature; bh=ayJg7c76iaqLEMbmn2+UQfCtZr733TZrLHZdTiox/GQ=; b=H2cvCA6ZpNT2bst+zoLN7QbMZV9H3LzvZ3MuBceaKtlO3pA4OZJOiGDuRC7iVMMLMQc/T3 9gTzW5IRTj1n39pV1r7Bd27mGk3qghSbdwPYaIjOxYtVjHJsk5YAdSMt4RICdMGjbuE1ps JbxWQDlK/7LLR+y6QVL1bKtsKcdvbaRWzHPSxGKAcClq+CRMDeYsK2khDhUUhO4WtO6mdc Y7tjN2ieOc/XgyFgJ87AC0UK2WSYaMyIAKCoa4M8Pu1ERO5lHiaZQEK+K/Z+r5oe3jnQwe sjckilFI04BBQ75KX/WivbxOvR66hCSh2fvvDZjkjwIZSg2NSJF0P1deZpSRuA== ARC-Seal: i=1; s=key1; d=yhetil.org; t=1615072818; a=rsa-sha256; cv=none; b=X5FluAScVQ3a3FXNKvh8U7Y1U4Gc4DIeItv/J44Xfb8iFqLtpb32UFsRwkV8hi0Kc3YJey y3MRTBy428oELffShzBlbu+HJTBaxJmrphSlAY1tVnUQe8WsyQLLKnytHS9x3fODUCYOVR bWy4BbrLrzfpjp+fRJwNOFEq1dX8J3ntB4scX7utHIgc7FsknQCN5yjmelM9DmytuFyoe5 HjvC2w+Gp/9r2fpz2C0c0zXHa6c3gzBrdxUXY6ymzr4pP8g2ay3OBGi2HyvI8yLr54LAMl QL3pfOppwmFCHlNRPEgCxlhArKxbccAthFbv3JMPtpod1yiauA2pzIOymvwcHQ== ARC-Authentication-Results: i=1; aspmx1.migadu.com; dkim=pass header.d=zaclys.net header.s=default header.b=RPglERc5; dmarc=pass (policy=reject) header.from=zaclys.net; spf=pass (aspmx1.migadu.com: domain of guix-devel-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=guix-devel-bounces@gnu.org X-Migadu-Spam-Score: -5.17 Authentication-Results: aspmx1.migadu.com; dkim=pass header.d=zaclys.net header.s=default header.b=RPglERc5; dmarc=pass (policy=reject) header.from=zaclys.net; spf=pass (aspmx1.migadu.com: domain of guix-devel-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=guix-devel-bounces@gnu.org X-Migadu-Queue-Id: 8114222B20 X-Spam-Score: -5.17 X-Migadu-Scanner: scn1.migadu.com X-TUID: 9mO/9wYwjDfc --=-SC25y89S11QJQPGzcomi Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Sat, 2021-03-06 at 21:35 +0000, Christopher Baines wrote: In general I think binary translation is very wasteful use of computing resources. At least use something like this:=20 http://csl.iis.sinica.edu.tw/hqemu/ - otherwise I think building natively is at the end less costly. > I'd like the Guix Build Coordinator agents to be able to report the > configuration of the machine at the time builds happen, so maybe once > that's a feature, and QEMU support can be detected, then it'll be > possible to look for cases where a change in QEMU support affects the > build result. What about including such metadata in Nars directly? Kernel name and version string, system/target, processor model.. or is that too privacy-invasive..? Maybe make such opt-in. 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