From patchwork Sat Oct 17 23:14:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Morton X-Patchwork-Id: 11843125 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D0F8814B5 for ; Sat, 17 Oct 2020 23:14:50 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 97C7C20897 for ; Sat, 17 Oct 2020 23:14:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="EmRDwEgZ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 97C7C20897 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id A83986B008A; Sat, 17 Oct 2020 19:14:49 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id A337E6B008C; Sat, 17 Oct 2020 19:14:49 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 8D54B6B0092; Sat, 17 Oct 2020 19:14:49 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0116.hostedemail.com [216.40.44.116]) by kanga.kvack.org (Postfix) with ESMTP id 6068D6B008A for ; Sat, 17 Oct 2020 19:14:49 -0400 (EDT) Received: from smtpin02.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 0B22B181AEF07 for ; Sat, 17 Oct 2020 23:14:49 +0000 (UTC) X-FDA: 77382974298.02.knot52_07048ea27229 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin02.hostedemail.com (Postfix) with ESMTP id DBCEB101E2D3A for ; Sat, 17 Oct 2020 23:14:48 +0000 (UTC) X-Spam-Summary: 1,0,0,973b3978f4e8c113,d41d8cd98f00b204,akpm@linux-foundation.org,,RULES_HIT:41:355:379:800:960:967:973:988:989:1260:1345:1359:1381:1431:1437:1534:1541:1711:1730:1747:1777:1792:2393:2525:2559:2563:2682:2685:2859:2902:2933:2937:2939:2942:2945:2947:2951:2954:3022:3138:3139:3140:3141:3142:3352:3834:3865:3866:3867:3870:3871:3872:3874:3934:3936:3938:3941:3944:3947:3950:3953:3956:3959:4250:4321:4560:5007:6261:6653:7514:7576:8957:9025:9545:10004:11026:11473:11658:11914:12043:12048:12296:12297:12517:12519:12555:12679:12986:13069:13311:13357:13846:14181:14384:14721:21080:21451:21627:21939:30034:30054:30056:30064:30070,0,RBL:198.145.29.99:@linux-foundation.org:.lbl8.mailshell.net-62.2.0.100 64.100.201.201;04yrgtge5wff4dye8ocr4y854n67doc78qiz79ba1e5s8xx9r6edtr1tzkwy87w.yy7n1q1ajef1hpcwanq8g97hf8skn83u5xy3p7ghsfnf313jdmnz3h6hmfagz9r.n-lbl8.mailshell.net-223.238.255.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,C ustom_ru X-HE-Tag: knot52_07048ea27229 X-Filterd-Recvd-Size: 2712 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf47.hostedemail.com (Postfix) with ESMTP for ; Sat, 17 Oct 2020 23:14:48 +0000 (UTC) Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8CBA3212CC; Sat, 17 Oct 2020 23:14:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1602976487; bh=25RfhTqr2Jfw6P3r6zDykxyPWbiJknJ7qwh27f3yQic=; h=Date:From:To:Subject:In-Reply-To:From; b=EmRDwEgZvAUwkCRkYXY55983hD7TvnkRXlNWpLbwzSl4v+Le3P6he8EmejHQiJAs2 nyGFbRwmRaLQwIGd+Zo8njT+KV5i1Befpyzw6oxT5coCTexTJ/pXddxDOvxBjlSWvx Y+C6HhiEgjQGyFDgjAN8cjYK997CjwJjtJrLu7ok= Date: Sat, 17 Oct 2020 16:14:47 -0700 From: Andrew Morton To: akpm@linux-foundation.org, jhubbard@nvidia.com, linux-mm@kvack.org, mm-commits@vger.kernel.org, rcampbell@nvidia.com, shuah@kernel.org, sj38.park@gmail.com, torvalds@linux-foundation.org Subject: [patch 23/40] selftests/vm: 10x speedup for hmm-tests Message-ID: <20201017231447.uw23bzJ9_%akpm@linux-foundation.org> In-Reply-To: <20201017161314.88890b87fae7446ccc13c902@linux-foundation.org> User-Agent: s-nail v14.8.16 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: John Hubbard Subject: selftests/vm: 10x speedup for hmm-tests This patch reduces the running time for hmm-tests from about 10+ seconds, to just under 1.0 second, for an approximately 10x speedup. That brings it in line with most of the other tests in selftests/vm, which mostly run in < 1 sec. This is done with a one-line change that simply reduces the number of iterations of several tests, from 256, to 10. Thanks to Ralph Campbell for suggesting changing NTIMES as a way to get the speedup. Link: https://lkml.kernel.org/r/20201003011721.44238-1-jhubbard@nvidia.com Signed-off-by: John Hubbard Suggested-by: Ralph Campbell Cc: SeongJae Park Cc: Shuah Khan Signed-off-by: Andrew Morton --- tools/testing/selftests/vm/hmm-tests.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/tools/testing/selftests/vm/hmm-tests.c~selftests-vm-10x-speedup-for-hmm-tests +++ a/tools/testing/selftests/vm/hmm-tests.c @@ -49,7 +49,7 @@ struct hmm_buffer { #define TWOMEG (1 << 21) #define HMM_BUFFER_SIZE (1024 << 12) #define HMM_PATH_MAX 64 -#define NTIMES 256 +#define NTIMES 10 #define ALIGN(x, a) (((x) + (a - 1)) & (~((a) - 1)))