From owner-freebsd-current@freebsd.org Sat Apr 7 19:59:18 2018 Return-Path: Delivered-To: freebsd-current@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 0FC93F80392 for ; Sat, 7 Apr 2018 19:59:18 +0000 (UTC) (envelope-from chmeeedalf@gmail.com) Received: from mail-lf0-x244.google.com (mail-lf0-x244.google.com [IPv6:2a00:1450:4010:c07::244]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4631D70F2E; Sat, 7 Apr 2018 19:59:17 +0000 (UTC) (envelope-from chmeeedalf@gmail.com) Received: by mail-lf0-x244.google.com with SMTP id z143-v6so4870691lff.3; Sat, 07 Apr 2018 12:59:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=MuDggmqLUxPEnr7jczEEY7MJd34Y50wJKZJAALKk/jk=; b=Ou4MRdkLP248I43+OAQ/Y1n4ZO+b4KAKZYNbGceEPtDC2OTOs9HBfyuO/ysoMhNgyn X7k0LXJg7MUseCxngrdBzj+y05rK4qhbzhKwYL8Kdr7hQotgUIsXlLBXFd+Ok4j2f/GE Ef62rXb2MW+/Y+L8lMHLN42ZppqQt4/Y+3Ngs9bgcIFCTDr+pHTTb5ty/u+aJqVt2BOR rr2mlo2lQe1pSvRmbimcyhl4WOTzeJlUmJ/LgO9318DGrXRmmaGmbxojKN6lR6Jj7VYO 5nvvw5hsL/iZo3+FdwpjCm5HA1g+OSruiiBX5x+vUsAYCRjQ3JTRCn6zJQzBpYJphO2p fBZQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=MuDggmqLUxPEnr7jczEEY7MJd34Y50wJKZJAALKk/jk=; b=OjyhplaynW/I6YMvljAKLvvJR8+NgLw70+SpS9KCsGgfV1FxaFM4NBHOl3pYzk3e4o wWPkUVih3TGubHAtAlcf+Y/4QM6CexlA+zOyfedju6JMV6rm/4uSLiqXL7MtZxW54Xn/ aZkf+VvODOt9NAUz1E+ct8+FzX2sccWIO77FSwu+iZ+gqkLKiKhYtXromr0KaXv7PG4p 6+cVjnH+2h10WyyHtzUV9KddYvAWht7LP6ONI+UvIn/2Q9SHYQ1WR/Xwiy+AlC9Au8ST 9r4MEvAFbjoKEYzgy/g8WVUm5l1czpVMZeGXw2PmwqvQJjUmtOl1+IAKmZnXpkL0BptY UbMA== X-Gm-Message-State: ALQs6tA8SuyJ1Ux4AFxtT3uQJc4vppCFSf199fDuKrKUKtJoo5yhVlFa bazRSE4ySxklnR0XBANBbf5iigWvw93xu4UspcQ= X-Google-Smtp-Source: AIpwx49Eszns53aaU6O1upNWcMPRLDFb0DbNsfGQ9QeJj4KJ36//WUVgP7QI5JBWiRiZGr5JXg7+qXFy9l4BCNPzLbI= X-Received: by 2002:a19:7385:: with SMTP id h5-v6mr19618347lfk.67.1523131155437; Sat, 07 Apr 2018 12:59:15 -0700 (PDT) MIME-Version: 1.0 Received: by 10.46.85.13 with HTTP; Sat, 7 Apr 2018 12:59:14 -0700 (PDT) In-Reply-To: References: <20180320070745.GA12880@server.rulingia.com> <2b3db2af-03c7-65ff-25e7-425cfd8815b6@FreeBSD.org> <1fd2b47b-b559-69f8-7e39-665f0f599c8f@FreeBSD.org> <20180404174949.GA12271@raichu> <20180406150814.GB10017@raichu> From: Justin Hibbits Date: Sat, 7 Apr 2018 14:59:14 -0500 Message-ID: Subject: Re: Strange ARC/Swap/CPU on yesterday's -CURRENT To: Don Lewis Cc: Mark Johnston , Jeff Roberson , FreeBSD current Content-Type: text/plain; charset="UTF-8" X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 07 Apr 2018 19:59:18 -0000 Hi Don, > I initially missed that this was on powerpc. I believe that arch is a > bit odd with characters unsigned by default and arithmentic shifts > always being unsigned. Things like that could mess up the algorithm, > but I didn't see anything suspicious in the r329882 diff. I think the biggest difference for powerpc64 vs amd64 in this case is the (currently) relatively small KVA (7.5GB vs 2(?) TB). That might make a difference regarding VM pageout calculations. - Justin