From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756327AbaFYWYJ (ORCPT ); Wed, 25 Jun 2014 18:24:09 -0400 Received: from gw-1.arm.linux.org.uk ([78.32.30.217]:43043 "EHLO pandora.arm.linux.org.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755493AbaFYWYG (ORCPT ); Wed, 25 Jun 2014 18:24:06 -0400 Date: Wed, 25 Jun 2014 23:23:56 +0100 From: Russell King - ARM Linux To: Sudeep Holla Cc: linux-kernel@vger.kernel.org, Rob Herring , linux-s390@vger.kernel.org, Lorenzo Pieralisi , linux-ia64@vger.kernel.org, linux-doc@vger.kernel.org, Greg Kroah-Hartman , x86@kernel.org, Heiko Carstens , linux390@de.ibm.com, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH 2/9] drivers: base: support cpu cache information interface to userspace via sysfs Message-ID: <20140625222355.GK32514@n2100.arm.linux.org.uk> References: <1403717444-23559-1-git-send-email-sudeep.holla@arm.com> <1403717444-23559-3-git-send-email-sudeep.holla@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1403717444-23559-3-git-send-email-sudeep.holla@arm.com> User-Agent: Mutt/1.5.19 (2009-01-05) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jun 25, 2014 at 06:30:37PM +0100, Sudeep Holla wrote: > + coherency_line_size: the minimum amount of data that gets transferred So, what value to do envision this taking for a CPU where the cache line size is 32 bytes, but each cache line has two dirty bits which allow it to only evict either the upper or lower 16 bytes depending on which are dirty? -- FTTC broadband for 0.8mile line: now at 9.7Mbps down 460kbps up... slowly improving, and getting towards what was expected from it.