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[205.151.56.5]) by smtp.gmail.com with ESMTPSA id h3sm848980qka.122.2021.04.20.19.47.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Apr 2021 19:47:30 -0700 (PDT) From: Maxim Cournoyer To: Mark H Weaver Subject: Re: wip-ungrafting builds stuck References: <87sg3nnc6f.fsf@gnu.org> <874kg3rjay.fsf@gnu.org> <871rb7tw24.fsf@netris.org> Date: Tue, 20 Apr 2021 22:47:29 -0400 In-Reply-To: <871rb7tw24.fsf@netris.org> (Mark H. 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List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Guix Devel , Mathieu Othacehe 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=1618973266; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc: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=oEJ7XRedezN5F15ZOjoAMweAoz2sO+JJj8JNI48hKhU=; b=Ucexl9VrJinpCFHYgNMNEvzQbVBWzAfWZkAkt4NVCiflhlJVNhfZX6oR97pa7z4v/zHuqX yScHW5OytUrB8Ma8vJzG0BXfeDzDYY/v8TuddxnDCiXoMM8F+baKWSw3oxIpnft8vIUolz EUAksoD0Z1klCnY+D+2Rag7u2nS0/YrTfvoC8QV1ee8K2c48hZZKxVYkhebT9jwJYV35SD 5THtD+c9Sn8CIYgVESC1aAtU437jwNH5naog1A2u+wsMg2hU8D/ZxbGFogYgPwsbr5Z+rw QJSJAI4ERnd5nl086GS8oeveItFpSr+i85EzLXBsvhNCMHvlkaCnbFg9xDr36w== ARC-Seal: i=1; s=key1; d=yhetil.org; t=1618973266; a=rsa-sha256; cv=none; b=WgA+i5vUmC2W1QxSKqrI9/u0vxy8p9VqA8TGA48MO8vyI07dP2Orcm/qZB/ZjIzhB467bR urIzwLFdNdC6U7VNbwgoFttjC6Cj+uxfq8YwHurnpc6dWHgDVXm8eCGO5tXLUfOpn4LVGH AXuVxvdOl2/jixZV0nlGdfWrbhD+nxnVRzvFrTsirZiZLNvwCFmpSXuTUrTtvM+99gO5nt Tng0dKndUMttedgw/4AeU+6i8YzF/4ISIj3Zyf+UdL7Xos73UxNc6ByJbBnmdwfresTpxn 4S5UpaIgLh3ekcntipRpLeS6UTFObRdS7Qn3xLexYBdGAUMPz7skwzHljlPcuQ== ARC-Authentication-Results: i=1; aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=gmail.com header.s=20161025 header.b="ClSxRg/J"; dmarc=fail reason="SPF not aligned (relaxed)" header.from=gmail.com (policy=none); 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: -1.34 Authentication-Results: aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=gmail.com header.s=20161025 header.b="ClSxRg/J"; dmarc=fail reason="SPF not aligned (relaxed)" header.from=gmail.com (policy=none); 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: 6DDF5112E4 X-Spam-Score: -1.34 X-Migadu-Scanner: scn0.migadu.com X-TUID: 13sNkmLCJe4W Hi, Mark H Weaver writes: > Mathieu Othacehe writes: > >>> Any idea what could be wrong, Mathieu? What would you suggest to do >>> when investigating such issues? >> >> Yes I noticed it. The main problem here is that almost all workers are >> stuck building Rust. >> >> I see two actions here: >> >> 1. Understand why Rust is taking so long to build. > > The attached patch, which I've been using on my private branch of Guix > for a long time and is fully tested, would significantly speed up the > Rust bootstrap. I never submitted it because I wasn't sure it would be > of interest. > > Mark FWIW, the tests are already disabled on core-updates, which reduced the build time by 33%. Also we now bootstrap from 1.29 there instead of 1.19. The net result is a 50% faster bootstrap (8 hours) compared to master (16 hours) on a 3900X Ryzen processor. That's still a lot of time. I hope that the effort to produce a GCC front end for Rust succeeds [0]. Otherwise mrustc, which we already use to bootstrap rust, is now able to bootstrap from 1.39 (unreleased yet though), so we should look into making use of it [1]. Maxim [0] https://github.com/Rust-GCC/gccrs [1] https://github.com/thepowersgang/mrustc/