From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9C7CFC4829C for ; Thu, 8 Feb 2024 13:42:17 +0000 (UTC) Received: from mail-wr1-f48.google.com (mail-wr1-f48.google.com [209.85.221.48]) by mx.groups.io with SMTP id smtpd.web11.17815.1707399734965796750 for ; Thu, 08 Feb 2024 05:42:15 -0800 Authentication-Results: mx.groups.io; dkim=pass header.i=@linuxfoundation.org header.s=google header.b=hn/6wu17; spf=pass (domain: linuxfoundation.org, ip: 209.85.221.48, mailfrom: richard.purdie@linuxfoundation.org) Received: by mail-wr1-f48.google.com with SMTP id ffacd0b85a97d-33b535c5d0fso833639f8f.0 for ; Thu, 08 Feb 2024 05:42:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=google; t=1707399733; x=1708004533; darn=lists.openembedded.org; h=mime-version:user-agent:content-transfer-encoding:autocrypt :references:in-reply-to:date:cc:to:from:subject:message-id:from:to :cc:subject:date:message-id:reply-to; bh=hWhfMfgFaNkmScH/J55yiPbm3GBPSWLKk26c07DrDXA=; b=hn/6wu17T4uW/TqwCPwdEHlRpIcvi7jer/tqRm7vYu1rNn9BzxAI8kc2+3CpsKnSg8 n3hmHRYwparD08Mq/M9pPH3qLC2wvhBnD21U5ES2YK0UEZB++jB04YJO/N/O8cr/z3Z/ +m+WZuoHUOOx+FQUvxHET/HpCN481Ph/g/T7w= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1707399733; x=1708004533; h=mime-version:user-agent:content-transfer-encoding:autocrypt :references:in-reply-to:date:cc:to:from:subject:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=hWhfMfgFaNkmScH/J55yiPbm3GBPSWLKk26c07DrDXA=; b=M/FEp+cFf6pv2YK6UI2z+pTz6RGJx9SQnC5O4GhDoPv3TkeGg45Yq5gQQRjiSTUnWz cVVvary4HZ/kuHblp1Fjww2e+RwwYVC+T0qGQk/0STtrw65+3UQ7LdRP+AWPenm+wi5v ORq/Dw/AGZbLFr9NAAegMugLTmWJk4/1cfdq39yxqsLWGz38Ryp8STi793GCVJpRy6Tu yx0WBXUy03kmrWsyl9jS/nnxia9uz2keGwWFh3QL+swW3uwkHeQIGeCcIGWAdIppgMOT 2ypZ8ouRCNo1n2OzfoauLsjOEx4cAW7AmIiCQiRxPXXV+L+B25chquEAsG9d/lFBFBSK 6qFw== X-Forwarded-Encrypted: i=1; AJvYcCWoxoEId5Dr1G5nq8fYTs7pKJnD7VksdD8OHoNEvMeLk6SqnSKr6Bciryw9VPBi2BMrjfSHzR8Xa7bmPph84L4moEfaATM7Y1rsT/35Sabv6ku8e9VbBp/s X-Gm-Message-State: AOJu0Yzlv9D8KAFhKW7lMR9qT0NaS78o48QlR2BEAGdqXNUwMmk0+dxu 2p5VDk1LG3KUNqKEUg4cf4QPOlfnNbjeQoRsaDBd0UAHohoO4FhszUtBx/9PNYY= X-Google-Smtp-Source: AGHT+IEJ4/dFxmgdzvZ8FLhrm53MNJ5+1phrLLSHnqSyGBDvlyOtwzQZx8W98ZMmUE/FpMlVxlFdng== X-Received: by 2002:a5d:5f92:0:b0:33b:2884:edf2 with SMTP id dr18-20020a5d5f92000000b0033b2884edf2mr8212316wrb.56.1707399733015; Thu, 08 Feb 2024 05:42:13 -0800 (PST) X-Forwarded-Encrypted: i=1; AJvYcCVJiMY7qShRN2ee49hd84IotPA2VVmmKHv54xhNO2p7FkwcvRnMyNkcRr0MyHFZirwQXx/qJuq77iO/M4FALSIWzdJh+04VybjdH6fIXcM7wcoAHNb3ymggVAiJ1fZzyykvmn6ZuyH0uZvjBGtztEobcS/8VkgShtJwlGHgHlm4FCU36b3VZMSQbFuXzA== Received: from ?IPv6:2001:8b0:aba:5f3c:c14:ae3d:85df:fff? ([2001:8b0:aba:5f3c:c14:ae3d:85df:fff]) by smtp.gmail.com with ESMTPSA id bv11-20020a0560001f0b00b0033b483d1abcsm1324532wrb.53.2024.02.08.05.42.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Feb 2024 05:42:12 -0800 (PST) Message-ID: <018185898b86e2fccabf68570a6aec6039a0c6d6.camel@linuxfoundation.org> Subject: Re: [OE-core] Core workflow: sstate for all, bblock/bbunlock, tools for why is sstate not being reused? From: Richard Purdie To: Alexander Kanavin Cc: openembedded-architecture , Yocto-mailing-list , ",openembedded-core@lists.openembedded.org" , Joshua Watt Date: Thu, 08 Feb 2024 13:42:11 +0000 In-Reply-To: References: <17ACA59E7A7FD97B.16230@lists.openembedded.org> Autocrypt: addr=richard.purdie@linuxfoundation.org; prefer-encrypt=mutual; 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YNvg== Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.50.0-1 MIME-Version: 1.0 List-Id: X-Webhook-Received: from li982-79.members.linode.com [45.33.32.79] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Thu, 08 Feb 2024 13:42:17 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/195153 On Thu, 2024-02-08 at 14:35 +0100, Alexander Kanavin wrote: > On Mon, 5 Feb 2024 at 22:11, Richard Purdie > wrote: > > > - export the hash equivalency database into something human readable, > > > and placed into the bundle, and then import it back when the bundle i= s > > > unpacked and set up. As far as I understand currently there's no code > > > for this. I'd find it useful in general, as effects of hash > > > equivalency can be tricky to grasp, and being able to look at the > > > database in a human readable format goes a long way towards > > > understanding how it all fits together. There may be other use cases > > > where you'd want to move the content of the database between build > > > machines. I'd like to get Joshua's take on this, did I misunderstand > > > this completely? > >=20 > > You don't misunderstand, this is an issue. > >=20 > > The good news is that the hashes needed will be in > > cache/bb_unihashes.dat. The eSDK code saves and restores that to ensure > > things all work out ok. > >=20 > > It isn't human readable but could be translated easily enough. >=20 > Right, I didn't realize bb_unihashes.dat is simply a python pickle, > and can be dumped to stdout with a three-liner script. >=20 > What I don't understand is why for each task, that file seems to > contain only a single pair of equivalence, and only matching the last > build. The complete set seems to be in hashserv.db, but I didn't yet > look into the structure of that or whether it's portable to other > locations as a file copy. >=20 > So how do the two files interact? Shouldn't we copy over the full > database rather, and have bitbake re-create the cache on the other > side from that? hashserve.db is a full hash serve database. When we run a build without specifying a hash serve to use, bitbake will start a local one and this is the file which backs it. In a build with a remote hashserve, it won't be present. the unihashes file is bitbake's internal lookup cache. It exists so that if the hashserve isn't local, we have a local lookup of our "last" value. This means the file is good for the current (last) build not much beyond that. I'm not saying any of this entirely solves the problem at hand, just that some of the data is there. Cheers, Richard