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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E9D3AC05027 for ; Fri, 20 Jan 2023 22:36:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229659AbjATWg4 (ORCPT ); Fri, 20 Jan 2023 17:36:56 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45042 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229470AbjATWgz (ORCPT ); Fri, 20 Jan 2023 17:36:55 -0500 Received: from frasgout11.his.huawei.com (frasgout11.his.huawei.com [14.137.139.23]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8B509613EE for ; Fri, 20 Jan 2023 14:36:53 -0800 (PST) Received: from mail02.huawei.com (unknown [172.18.147.227]) by frasgout11.his.huawei.com (SkyGuard) with ESMTP id 4NzDgC3YSbz9v7VY for ; Sat, 21 Jan 2023 06:28:55 +0800 (CST) Received: from [10.81.218.54] (unknown [10.81.218.54]) by APP2 (Coremail) with SMTP id GxC2BwBn7mRiF8tj6ECxAA--.45932S2; Fri, 20 Jan 2023 23:36:29 +0100 (CET) Message-ID: <44a2c301-900e-90ea-4b21-e5264102e699@huaweicloud.com> Date: Fri, 20 Jan 2023 23:36:15 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.6.1 Subject: Re: Internal vs. external barriers (was: Re: Interesting LKMM litmus test) To: paulmck@kernel.org Cc: Alan Stern , Andrea Parri , Jonas Oberhauser , Peter Zijlstra , will , "boqun.feng" , npiggin , dhowells , "j.alglave" , "luc.maranget" , akiyks , dlustig , joel , urezki , quic_neeraju , frederic , Kernel development list References: <20230118211201.GL2948950@paulmck-ThinkPad-P17-Gen-1> <09f084d2-6128-7f83-b2a5-cbe236b1678d@huaweicloud.com> <20230119001147.GN2948950@paulmck-ThinkPad-P17-Gen-1> <0fae983b-2a7c-d44e-8881-53d5cc053f09@huaweicloud.com> <20230119184107.GT2948950@paulmck-ThinkPad-P17-Gen-1> <20230119215304.GA2948950@paulmck-ThinkPad-P17-Gen-1> <20230120153909.GF2948950@paulmck-ThinkPad-P17-Gen-1> <20230120213727.GX2948950@paulmck-ThinkPad-P17-Gen-1> From: Jonas Oberhauser In-Reply-To: <20230120213727.GX2948950@paulmck-ThinkPad-P17-Gen-1> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-CM-TRANSID: GxC2BwBn7mRiF8tj6ECxAA--.45932S2 X-Coremail-Antispam: 1UD129KBjvdXoWrKFyUCFyfAFyDtFWUXr4UCFg_yoW3tFcEka 40kFyxGr43AwsxJ3W8Kr4rWr9a9rW29FykXa1UXw4xt34rXFWkJrZFkFn29wnrJa9xWFn0 9w1j9w4IvrWIqjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUb-xYFVCjjxCrM7AC8VAFwI0_Xr0_Wr1l1xkIjI8I6I8E6xAIw20E Y4v20xvaj40_Wr0E3s1l1IIY67AEw4v_Jr0_Jr4l8cAvFVAK0II2c7xJM28CjxkF64kEwV A0rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVWUJVWUCwA2z4x0Y4vE2Ix0cI8IcVCY1x02 67AKxVW8JVWxJwA2z4x0Y4vEx4A2jsIE14v26r4j6F4UM28EF7xvwVC2z280aVCY1x0267 AKxVW8Jr0_Cr1UM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40E x7xfMcIj6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x 0Yz7v_Jr0_Gr1lF7xvr2IY64vIr41lFIxGxcIEc7CjxVA2Y2ka0xkIwI1lc7I2V7IY0VAS 07AlzVAYIcxG8wCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwCFI7km07 C267AKxVWUXVWUAwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1r MI8E67AF67kF1VAFwI0_GFv_WrylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJV WUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6rWU JVWrZr1UMIIF0xvEx4A2jsIE14v26r4j6F4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr1j6F 4UJbIYCTnIWIevJa73UjIFyTuYvjxUFDGOUUUUU X-CM-SenderInfo: 5mrqt2oorev25kdx2v3u6k3tpzhluzxrxghudrp/ X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 1/20/2023 10:37 PM, Paul E. McKenney wrote: > > Just out of curiosity, are you [set] up to run LKMM locally at your end? I don't know what exactly that means. I generally run it on wetware. But I sometimes ask Hernan to run Dat3M (on his machine) over all the litmus tests in your repo to spot any obvious problems with variations I consider. I don't think Dat3M is feature-complete with herd at the moment, just unbelievably faster. For example I think it ignores all flags in the cat files. Oh, I just remembered that I also installed herd7 recently to make sure that any patches I might send in satisfy herd7 syntax requirements (I think you called this diagnostic driven development?), but I haven't used it to really run anything. Is it too obvious that my words usually aren't backed by cold machine logic? Best wishes, jonas