From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ob0-f178.google.com (mail-ob0-f178.google.com [209.85.214.178]) by kanga.kvack.org (Postfix) with ESMTP id 7B5EA6B0031 for ; Thu, 6 Mar 2014 20:55:09 -0500 (EST) Received: by mail-ob0-f178.google.com with SMTP id wp18so3480728obc.23 for ; Thu, 06 Mar 2014 17:55:09 -0800 (PST) Received: from g5t1625.atlanta.hp.com (g5t1625.atlanta.hp.com. [15.192.137.8]) by mx.google.com with ESMTPS id m4si4281823oel.113.2014.03.06.17.55.08 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Thu, 06 Mar 2014 17:55:08 -0800 (PST) Message-ID: <1394157304.2555.21.camel@buesod1.americas.hpqcorp.net> Subject: Re: [PATCH 6/7] x86: mm: set TLB flush tunable to sane value From: Davidlohr Bueso Date: Thu, 06 Mar 2014 17:55:04 -0800 In-Reply-To: <20140306004529.5510B23D@viggo.jf.intel.com> References: <20140306004519.BBD70A1A@viggo.jf.intel.com> <20140306004529.5510B23D@viggo.jf.intel.com> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Dave Hansen Cc: linux-kernel@vger.kernel.org, akpm@linux-foundation.org, ak@linux.intel.com, kirill.shutemov@linux.intel.com, mgorman@suse.de, alex.shi@linaro.org, x86@kernel.org, linux-mm@kvack.org, dave.hansen@linux.intel.com On Wed, 2014-03-05 at 16:45 -0800, Dave Hansen wrote: > From: Dave Hansen > > Now that we have some shiny new tracepoints, we can actually > figure out what the heck is going on. > > During a kernel compile, 60% of the flush_tlb_mm_range() calls > are for a single page. It breaks down like this: It would be interesting to see similar data for opposite workloads with more random access patterns. That's normally when things start getting fun in the tlb world. Thanks, Davidlohr -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org