From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.savoirfairelinux.com (mail.savoirfairelinux.com [208.88.110.44]) by mx.groups.io with SMTP id smtpd.msgproc01-g2.764.1792594898947995356 for ; Wed, 21 Oct 2026 08:01:39 -0700 Authentication-Results: mx.groups.io; dkim=pass header.i=@savoirfairelinux.com header.s=DFC430D2-D198-11EC-948E-34200CB392D2 header.b=M+25UHBK; spf=pass (domain: savoirfairelinux.com, ip: 208.88.110.44, mailfrom: elinor.montmasson@savoirfairelinux.com) Received: from localhost (localhost [127.0.0.1]) by mail.savoirfairelinux.com (Postfix) with ESMTP id A6AB73D81665; Wed, 21 Oct 2026 11:01:37 -0400 (EDT) Received: from mail.savoirfairelinux.com ([127.0.0.1]) by localhost (mail.savoirfairelinux.com [127.0.0.1]) (amavis, port 10032) with ESMTP id hnuSOo8s18ni; Wed, 21 Oct 2026 11:01:37 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mail.savoirfairelinux.com (Postfix) with ESMTP id DAF5F3D80F30; Wed, 21 Oct 2026 11:01:36 -0400 (EDT) DKIM-Filter: OpenDKIM Filter v2.10.3 mail.savoirfairelinux.com DAF5F3D80F30 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=savoirfairelinux.com; s=DFC430D2-D198-11EC-948E-34200CB392D2; t=1792594896; bh=R75cZhn6fymXv/HbBMISKkOJpWzoTucubn+BZf5RrPQ=; h=Date:From:To:Message-ID:MIME-Version; b=M+25UHBKMkGcTTyUgVFoUJ6q873Hz0ucA5YT7W26TKwt2n++ZIO/7GzLrGK1jlpCl 3VtIPpvfNGzNAvtOuNWQOJD9Tn7mFnh6YIT2F+UVQ8O5s/BOD9aYPagjDrBxSf1pb0 Os2jZZW5eyhOlHWjL31VWFtYzvvRa6uTA8nB05OyOC1N277s/duMwzAmslrf8ayHnC snHi4CJmCxAxjG9RP1v6b5su3Q2MiE0sXUVL4vcUb3Ch3elE3sgRQKsNWsBk/kEQQL dpkuPqv+NMCYYMJ4e6t4GFH+Fg403C1WOpp+sR2uxRIyQhIajr2LN8cgQNPhAaaqTZ iCaNQXCIUSliA== X-Virus-Scanned: amavis at mail.savoirfairelinux.com Received: from mail.savoirfairelinux.com ([127.0.0.1]) by localhost (mail.savoirfairelinux.com [127.0.0.1]) (amavis, port 10026) with ESMTP id j3AhT85m0zvK; Wed, 21 Oct 2026 11:01:36 -0400 (EDT) Received: from mail.savoirfairelinux.com (mail.savoirfairelinux.com [192.168.48.237]) by mail.savoirfairelinux.com (Postfix) with ESMTP id A06CE3D81665; Wed, 21 Oct 2026 11:01:36 -0400 (EDT) Date: Wed, 21 Oct 2026 11:01:36 -0400 (EDT) From: Elinor Montmasson To: peter marko Cc: adrian freihofer , yocto Message-ID: <248975416.905486.1792594896595.JavaMail.zimbra@savoirfairelinux.com> In-Reply-To: References: <1383658177.878587.1792571670575.JavaMail.zimbra@savoirfairelinux.com> Subject: Re: Issues and questions regarding PowerPC 32-bits e500v2 tuning MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Mailer: Zimbra 10.1.20_GA_0326 (ZimbraWebClient - FF158 (Linux)/10.1.20_GA_0326) X-Zimbra-Message-Verification: hash=SHA256;guid=ZWY0NGQ1Njk5NWUzMTYyMDExNjNiZjIzNThkMDgyYzRiZDY2N2ViNmMwNGVhMWI3NDUyNGYzMzQwNTBmOGFhNQ== Thread-Topic: Issues and questions regarding PowerPC 32-bits e500v2 tuning Thread-Index: csrwnORdasdJ3xzr7D7vjdu/N9REb6ThjGzwNaVB2iM= List-Id: X-Webhook-Received: from 45-33-107-173.ip.linodeusercontent.com [45.33.107.173] by lin-tor-korg-lkml-alma10-1 with HTTPS for ; Wed, 21 Oct 2026 15:01:49 -0000 X-Groupsio-URL: https://lists.yoctoproject.org/g/yocto/message/66777 Hello Peter, ----- Original Message ----- > From: "peter marko" > To: "Elinor Montmasson" , "adrian freihofer" > Cc: "yocto" > Sent: Wednesday, 21 October, 2026 15:50:22 > Subject: RE: Issues and questions regarding PowerPC 32-bits e500v2 tuning > Hello Elinor, > > I have already checked SPE on e500 before and can confirm that it needs to be > disabled in favor of soft-fpu with newer GCC versions. > It of course dramatically decreases performance, but what can we do... > > As usual with Yocto, only the default settings are being tested and untested > features slowly bit rot by time. > For now, we don't plan to extend our pipeline to all possible tunes/variations. > So ideally, you should send patches to fix your tune configuration and spin a > regular local pipeline with Yocto master to catch if it would break again. > > Best Regards, > Peter Ok, thank you for your answer, at least it confirms my analysis. Because GCC is not an option for SPE support, I am considering using the LLVM/Clang toolchain through meta-clang, as it seems to support PowerPC SPE. I know that some specific recipes will require building with GCC anyway, in that case fpu-soft will be enabled, but most of the distribution could build with clang. Is it something you have tested? Best regards, Elinor Montmasson