From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753008AbeC1Qsh (ORCPT ); Wed, 28 Mar 2018 12:48:37 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:40610 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752161AbeC1Qsf (ORCPT ); Wed, 28 Mar 2018 12:48:35 -0400 Date: Wed, 28 Mar 2018 09:49:22 -0700 From: "Paul E. McKenney" To: Peter Zijlstra Cc: schwidefsky@de.ibm.com, borntraeger@de.ibm.com, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, stern@rowland.harvard.edu, parri.andrea@gmail.com, will.deacon@arm.com, boqun.feng@gmail.com, npiggin@gmail.com, dhowells@redhat.com, j.alglave@ucl.ac.uk, luc.maranget@inria.fr, akiyks@gmail.com Subject: Re: [PATCH RFC tools/memory-model] Add s390.{cfg,cat} Reply-To: paulmck@linux.vnet.ibm.com References: <20180328134232.GA29274@linux.vnet.ibm.com> <20180328134813.GF4082@hirez.programming.kicks-ass.net> <20180328142004.GR3675@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180328142004.GR3675@linux.vnet.ibm.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-GCONF: 00 x-cbid: 18032816-0048-0000-0000-000002512365 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00008760; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000255; SDB=6.01009704; UDB=6.00514384; IPR=6.00788987; MB=3.00020293; MTD=3.00000008; XFM=3.00000015; UTC=2018-03-28 16:48:32 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18032816-0049-0000-0000-000044953BBF Message-Id: <20180328164922.GA25475@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2018-03-28_06:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1803280174 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Mar 28, 2018 at 07:20:04AM -0700, Paul E. McKenney wrote: > On Wed, Mar 28, 2018 at 03:48:13PM +0200, Peter Zijlstra wrote: > > On Wed, Mar 28, 2018 at 06:42:32AM -0700, Paul E. McKenney wrote: > > > Hello! > > > > > > The prototype patch shown below provides files required to allow herd7 to > > > evaluate C-language litmus tests for the multicopy-atomic TSO ordering > > > provided by s390. > > > > There really isn't anything s390 specific here is there? That is, would > > this not equally work for x86 and sparc, both of which are similarly TSO > > ? > > As I understand it, there is a difference. The difference from TSO > systems such as x86 is that s390 is multicopy atomic as well as TSO. > In contrast, x86 is TSO as well as other-multicopy-atomic. I must defer > to Martin and Christian for details -- this should be interpreted as a > feeble first attempt on my part, not any sort of IBM-approved definition > of s390. ;-) > > > Given that, should this not be called TSO instead of s390 ? > > I agree completely with a single tso.cfg, TSO.cfg, or whatever name, > as opposed to a bunch of identical files for x86, SPARC, ... And to Alan's point, it appears that you can already test x86 TSO ordering on C-language litmus tests as follows: herd7 -conf linux-kernel.cfg -cat x86tso.cat litmus-tests/SB+poonceoncescoh.litmus Might simply be working by accident, but it does currently work. ;-) Thanx, Paul