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 X-Spam-Level: X-Spam-Status: No, score=-11.5 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_INVALID,DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,MISSING_HEADERS,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EEFD9C4363D for ; Fri, 2 Oct 2020 16:22:28 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 945B5206FA for ; Fri, 2 Oct 2020 16:22:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=google.com header.i=@google.com header.b="hDQngTLl" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 945B5206FA Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 119946B005C; Fri, 2 Oct 2020 12:22:28 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 0C8A46B005D; Fri, 2 Oct 2020 12:22:28 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id ED20B6B0074; Fri, 2 Oct 2020 12:22:27 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0122.hostedemail.com [216.40.44.122]) by kanga.kvack.org (Postfix) with ESMTP id C099D6B005C for ; Fri, 2 Oct 2020 12:22:27 -0400 (EDT) Received: from smtpin03.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 583B9180AD807 for ; Fri, 2 Oct 2020 16:22:27 +0000 (UTC) X-FDA: 77327503134.03.dog93_2a0b2ae271a5 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin03.hostedemail.com (Postfix) with ESMTP id 28E1D28A4EA for ; Fri, 2 Oct 2020 16:22:27 +0000 (UTC) X-HE-Tag: dog93_2a0b2ae271a5 X-Filterd-Recvd-Size: 5967 Received: from mail-qk1-f202.google.com (mail-qk1-f202.google.com [209.85.222.202]) by imf35.hostedemail.com (Postfix) with ESMTP for ; Fri, 2 Oct 2020 16:22:26 +0000 (UTC) Received: by mail-qk1-f202.google.com with SMTP id 16so1423455qky.8 for ; Fri, 02 Oct 2020 09:22:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:cc; bh=LRJDXnxkqiv1fXN9f+/QaOavubXnRcM3sdCzYDHh/KU=; b=hDQngTLlwEHOqbG2+qPgfBLtWoEqSz0RkrlSy0B5xHc4i/KeZ/R920ykBSSrSrqDgX CEX4Tgn8ZKwrNAh0SCxx3MqEG1DqjESis+XdXBnejPZw0+2u+FY9vYO4kxboKo2PiyEQ 3iBxhoVO+LzKAusmFIm+4JGhC1ynyXra7m+eLxYhBZxVxK4E0ZBejCp4qEzKcGsWpJZE puM1f74zS6RH4HpPzKX98Rg31esYNa7V4eey0WQFt5clFp1JKfoZGwplRwD6lHtSQ9F4 6x6NO+IrtXl6t5Fyg5dLe+13Pu8d05KrIWnvnQtTqOQg/lZsiJgR/56sN9FPpKJIu6P+ hpRg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:cc; bh=LRJDXnxkqiv1fXN9f+/QaOavubXnRcM3sdCzYDHh/KU=; b=VwOt3rFiUXa3clyTvL0prXmfZrSGyXcf1L569OxSKnhlfeJnuds3Q6tatLadPjpvAM /wi3Nj0x/Ma8b5gGDHusPc7u7kyKmnxuj0Is1eJDOTBvIpGRHpIjp0+C2NiMTA1oLNb1 gR++q69N67IAL5ZwGCaImWYeDlUg42MLoVmvnn26bPyS/s1HKDwu522pqLQU+I0kbN7E MgO8UmIM+yb4Xl3R1X53R1cXbh2QdN1PPF7GZkX8Jwd1K/a7177xHA3KCCOS7vEKUEkJ WxfmX117eV8LANm28VQzmqL3REfVodCqjWkVQ9/UguFlRe3FXtllvd2sRBr1EI3JYbzR kdDw== X-Gm-Message-State: AOAM530bMDRE8ZTkhNBcKUTRghEGagJ67+nFFAxqLAT1NRJbp8HA0Xat q4x8k7Pl3WsTg1DCGDcbqOLQRqEbdwJpkLGQFA== X-Google-Smtp-Source: ABdhPJw5Qv2OwIK9h4CVpf46tlO/7EN7KFe9wLwV6R2ARAWl/2Z2ldNw6qedIQHz6XTQMkbUNtRhsapSAzj+MENlEg== X-Received: from kaleshsingh.c.googlers.com ([fda3:e722:ac3:10:14:4d90:c0a8:2145]) (user=kaleshsingh job=sendgmr) by 2002:a05:6214:b0d:: with SMTP id u13mr2886535qvj.17.1601655745859; Fri, 02 Oct 2020 09:22:25 -0700 (PDT) Date: Fri, 2 Oct 2020 16:20:50 +0000 In-Reply-To: <20201002162101.665549-1-kaleshsingh@google.com> Message-Id: <20201002162101.665549-6-kaleshsingh@google.com> Mime-Version: 1.0 References: <20201002162101.665549-1-kaleshsingh@google.com> X-Mailer: git-send-email 2.28.0.806.g8561365e88-goog Subject: [PATCH v2 5/6] arm64: mremap speedup - Enable HAVE_MOVE_PUD From: Kalesh Singh Cc: surenb@google.com, minchan@google.com, joelaf@google.com, lokeshgidra@google.com, kaleshsingh@google.com, kernel-team@android.com, Catalin Marinas , Will Deacon , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , Andrew Morton , Shuah Khan , "Aneesh Kumar K.V" , Kees Cook , Peter Zijlstra , Arnd Bergmann , Masahiro Yamada , Sami Tolvanen , Krzysztof Kozlowski , Frederic Weisbecker , Hassan Naveed , Christian Brauner , Mark Rutland , Mark Brown , Mike Rapoport , Gavin Shan , Zhenyu Ye , Jia He , John Hubbard , Mike Kravetz , Ralph Campbell , Ram Pai , "Kirill A. Shutemov" , Mina Almasry , Sandipan Das , Dave Hansen , William Kucharski , Masami Hiramatsu , Ira Weiny , SeongJae Park , Brian Geffon , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org Content-Type: text/plain; charset="UTF-8" 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: HAVE_MOVE_PUD enables remapping pages at the PUD level if both the source and destination addresses are PUD-aligned. With HAVE_MOVE_PUD enabled it can be inferred that there is approximately a 19x improvement in performance on arm64. (See data below). ------- Test Results --------- The following results were obtained using a 5.4 kernel, by remapping a PUD-aligned, 1GB sized region to a PUD-aligned destination. The results from 10 iterations of the test are given below: Total mremap times for 1GB data on arm64. All times are in nanoseconds. Control HAVE_MOVE_PUD 1247761 74271 1219896 46771 1094792 59687 1227760 48385 1043698 76666 1101771 50365 1159896 52500 1143594 75261 1025833 61354 1078125 48697 1134312.6 59395.7 <-- Mean time in nanoseconds A 1GB mremap completion time drops from ~1.1 milliseconds to ~59 microseconds on arm64. (~19x speed up). Signed-off-by: Kalesh Singh --- arch/arm64/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 844d089668e3..4d521f0a5863 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -122,6 +122,7 @@ config ARM64 select HANDLE_DOMAIN_IRQ select HARDIRQS_SW_RESEND select HAVE_MOVE_PMD + select HAVE_MOVE_PUD select HAVE_PCI select HAVE_ACPI_APEI if (ACPI && EFI) select HAVE_ALIGNED_STRUCT_PAGE if SLUB -- 2.28.0.806.g8561365e88-goog