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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 77019C43458 for ; Mon, 29 Jun 2026 12:49:06 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4gpmLT0yQsz2yT0; Mon, 29 Jun 2026 22:49:05 +1000 (AEST) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=213.95.11.211 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1782737345; cv=none; b=ZH3a+Cv2i0PUfq0nH6057i44FXadk7G8adN8rdWa60isWBaYb7gzcDnWxVD/sTt9yHXgOmZDKoPjKt3rb8GeZu9DeXuQei/cUSC/yYjqI4FeYjtfMELqJy+60qoRsTlGWoHu+6LK+uGsx024LrcROlkLuWFM09HdJnnSYi4QqST4wgWLbo1J32lrnNTV52rmiXmvtEkyMxbPgSzMbmPWT05F++jit0Y0IDAiQpOzbOaZOMeOGRSXu+r6kpZvle7ID/SXvynk5xZg25CsRbtGKOLftq+vRGeKCH7+izJYtCjd7C8zbWh4S7Yr2VjRAiksaFYdcQDvH7UkAnKCw4bEEg== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1782737345; c=relaxed/relaxed; bh=ZnCdA3RZ8rzOBYeB70O433uBRb2J0cxlC2SD87W2TX0=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=RWc+Ql8PwLWrdUeh5GRI4u68YcuxJEUYYKwLHgJhQJaszNA7wY6ritnjpCVLF/+q+twdcFftp/07WIfePiS/5dXr0bhBZaqN6Gb69Osxl9V6meqt8VkJKhjfjJQmPy0ax46SI19gClexk7CC9YrvMmlcPBE5aSbjrdYYP5Ya4NJ+KFrfkTXGR3oycA+kzecp+E2Ks7iBGwM7OpMwLDnPKbU72/4WOyS+chMQ3lxOEKk0gp2awN4gk6Uo3GsiLcTO1rVT0/c2eBXfQimydV9h6CBWmIbW5xlGVqDRP6cG4/hiSdgLvmxOn4h3WcXvjEvNTyiIvV/tKCn3j+nxbgtTZg== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=lst.de; spf=pass (client-ip=213.95.11.211; helo=verein.lst.de; envelope-from=hch@lst.de; receiver=lists.ozlabs.org) smtp.mailfrom=lst.de Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=lst.de Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lst.de (client-ip=213.95.11.211; helo=verein.lst.de; envelope-from=hch@lst.de; receiver=lists.ozlabs.org) Received: from verein.lst.de (verein.lst.de [213.95.11.211]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4gpmLS34S4z2ySS for ; Mon, 29 Jun 2026 22:49:04 +1000 (AEST) Received: by verein.lst.de (Postfix, from userid 2407) id 8495D68B05; Mon, 29 Jun 2026 14:48:57 +0200 (CEST) Date: Mon, 29 Jun 2026 14:48:56 +0200 From: Christoph Hellwig To: "H. Peter Anvin" Cc: Christoph Hellwig , Andrew Morton , Catalin Marinas , Will Deacon , Ard Biesheuvel , Huacai Chen , WANG Xuerui , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , "Christophe Leroy (CS GROUP)" , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, Herbert Xu , Dan Williams , Chris Mason , David Sterba , Arnd Bergmann , Song Liu , Yu Kuai , Li Nan , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-crypto@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-arch@vger.kernel.org, linux-raid@vger.kernel.org Subject: Re: cleanup the RAID6 P/Q library v3 Message-ID: <20260629124856.GA23695@lst.de> References: <20260518051804.462141-1-hch@lst.de> <20260518141205.c100f76eec5f58e78bbbf7af@linux-foundation.org> <20260519082432.GA14956@lst.de> <7d8efc7c-65e3-49f8-9381-910de7affef2@zytor.com> <20260629122152.GA21344@lst.de> <8684FEC2-AD56-4BDA-874F-1D3D7170F880@zytor.com> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <8684FEC2-AD56-4BDA-874F-1D3D7170F880@zytor.com> User-Agent: Mutt/1.5.17 (2007-11-01) On Mon, Jun 29, 2026 at 05:34:41AM -0700, H. Peter Anvin wrote: > The real issue though is that the benchmarking isn't really helpful, either. > > It has to do with power across the whole chip, so it perversely enough depends on what *else* is going on... Yes. And preferences might matter if this is just a file server or something running a real workload as well. But I don't really have a good answer to that.