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 X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 523FFC433E2 for ; Wed, 15 Jul 2020 10:31:23 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 1E67B2067D for ; Wed, 15 Jul 2020 10:31:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=gibson.dropbear.id.au header.i=@gibson.dropbear.id.au header.b="WA2NmZOb" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1E67B2067D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=gibson.dropbear.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:44064 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jveh8-000454-Cr for qemu-devel@archiver.kernel.org; Wed, 15 Jul 2020 06:31:22 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:49932) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jvegH-0003YU-QZ for qemu-devel@nongnu.org; Wed, 15 Jul 2020 06:30:30 -0400 Received: from ozlabs.org ([2401:3900:2:1::2]:51285) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jvegE-0001v6-Sh for qemu-devel@nongnu.org; Wed, 15 Jul 2020 06:30:29 -0400 Received: by ozlabs.org (Postfix, from userid 1007) id 4B6DDD4qzKz9sTQ; Wed, 15 Jul 2020 20:30:20 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1594809020; bh=GjtEAxVXWmpKPy2K5f+eqECvHruOCY542r72yIiOv34=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=WA2NmZOb84/fbIJz/1WKI0z84Hu+Fb8Gb8njEvXu8B+tH/grPyJEAN4LTcdvLTjSc tE1q6VxRb6AZTGHqzCIE2Kq36bw0UlhvJ/JAXONNGhbaOeZrpRWtgpt8K5G9gfgyjs XgtmrebIiQfGtiMPmC8gRyAupMjysaJyidu1ewKY= Date: Wed, 15 Jul 2020 18:56:12 +1000 From: David Gibson To: Alex =?iso-8859-1?Q?Benn=E9e?= Subject: Re: [PATCH] .travis.yml: skip ppc64abi32-linux-user with plugins Message-ID: <20200715085612.GH93134@umbus.fritz.box> References: <20200714175516.5475-1-alex.bennee@linaro.org> <20200715040619.GG93134@umbus.fritz.box> <87o8ohxl36.fsf@linaro.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="poJSiGMzRSvrLGLs" Content-Disposition: inline In-Reply-To: <87o8ohxl36.fsf@linaro.org> Received-SPF: pass client-ip=2401:3900:2:1::2; envelope-from=dgibson@ozlabs.org; helo=ozlabs.org X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -9 X-Spam_score: -1.0 X-Spam_bar: - X-Spam_report: (-1.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HEADER_FROM_DIFFERENT_DOMAINS=1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Fam Zheng , Philippe =?iso-8859-1?Q?Mathieu-Daud=E9?= , qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" --poJSiGMzRSvrLGLs Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Jul 15, 2020 at 09:02:05AM +0100, Alex Benn=E9e wrote: >=20 > David Gibson writes: >=20 > > On Tue, Jul 14, 2020 at 06:55:16PM +0100, Alex Benn=E9e wrote: > >> We actually see failures on threadcount running without plugins: > >>=20 > >> retry.py -n 1000 -c -- \ > >> ./ppc64abi32-linux-user/qemu-ppc64abi32 \ > >> ./tests/tcg/ppc64abi32-linux-user/threadcount > >>=20 > >> which reports: > >>=20 > >> 0: 978 times (97.80%), avg time 0.270 (0.01 varience/0.08 deviation) > >> -6: 21 times (2.10%), avg time 0.336 (0.01 varience/0.12 deviation) > >> -11: 1 times (0.10%), avg time 0.502 (0.00 varience/0.00 deviation) > >> Ran command 1000 times, 978 passes > >>=20 > >> But when running with plugins we hit the failure a lot more often: > >>=20 > >> 0: 91 times (91.00%), avg time 0.302 (0.04 varience/0.19 deviation) > >> -11: 9 times (9.00%), avg time 0.558 (0.01 varience/0.11 deviation) > >> Ran command 100 times, 91 passes > >>=20 > >> The crash occurs in guest code which is the same in both pass and fail > >> cases. However we see various messages reported on the console about > >> corrupted memory lists which seems to imply the guest memory allocation > >> is corrupted. This lines up with the seg fault being in the guest > >> __libc_free function. So we think this is a guest bug which is > >> exacerbated by various modes of translation. If anyone has access to > >> real hardware to soak test the test case we could prove this properly. > >>=20 > >> Signed-off-by: Alex Benn=E9e > >> Cc: David Gibson > >> Cc: Philippe Mathieu-Daud=E9 > > > > Acked-by: David Gibson > > > > Honestly, AFAICT the ppc64abi32-linux-user target is pretty much > > entirely broken anyway. Many things about it appear to make no > > sense, it's difficult to work out what it's even supposed to be, and I > > strongly suspect no-one's actually used it in like a decade. >=20 > Should we think about marking it deprecated for 5.2? Yes, probably. I just haven't gotten around to it. --=20 David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_ | _way_ _around_! http://www.ozlabs.org/~dgibson --poJSiGMzRSvrLGLs Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEdfRlhq5hpmzETofcbDjKyiDZs5IFAl8OxKoACgkQbDjKyiDZ s5Lnyg/+KBoLp5qM3iFufJNcWBpJWQ1wnKm72TJYwfbO+YcszDn5ilEp+LHWlnpp /vZukorX3Bf7qdlwewdfvOI6HC3NL/tGShez1kgmKljrJ1LuQOvqhxuPJofQBmBj Ol/ME1eyaxfdEr0gaCQFAo09iMbbnP0HXARhyAmNrpfdfL08EzDxO5XpJD3IOrLd rCNmTpRlPPEG1CXCMT6MqxWT+UHLspBFBbsP2+l0cPTLGyDmcBvE99oI+c/Rrx4r 1FNPjQ7Qmd7I3fNU6e6YmqTDfE3qzmW1h2X2PuzMsE0M4FRyAP59LaeCBQ6S7MNj IvzmdmtP7j9a701Wf2tpeUvbr30V9eX1FIbNah9SERzD6HXplR0Mj2B2uzyuDuaE RAn9jO093IoiVWlbAnCwfWZXZ2w2nk16ZhPTvHPeT6MUY/gUQBM/4YM+QN08AYcZ 5aBnQRKistq5x4XFy1zkoHDkMVqJbSC8XNrQ1s0eiL1rZoUr8Hn+SVKbA0095KOI xH47dqDapvkAY3qGE4qwPXic2GBnocLbCwK6kRETg9L225/Y/MANreJsh93d9HB4 8puad6rq0qgR/yl4sNLjvK7mS/XRg9HOg6WDqbc3TcId4mD7dpwzpjLWygyEdgta 3AxcZbdjDTc2MHASLiCdtg1ouZer6QLceY/dTnBDPFujqNwWcqI= =hYJv -----END PGP SIGNATURE----- --poJSiGMzRSvrLGLs--