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 A299FC7EE37 for ; Fri, 9 Jun 2023 01:00:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233529AbjFIBAH (ORCPT ); Thu, 8 Jun 2023 21:00:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55278 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234505AbjFIA7s (ORCPT ); Thu, 8 Jun 2023 20:59:48 -0400 Received: from mail-yw1-x1149.google.com (mail-yw1-x1149.google.com [IPv6:2607:f8b0:4864:20::1149]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5B1AB270B for ; Thu, 8 Jun 2023 17:59:46 -0700 (PDT) Received: by mail-yw1-x1149.google.com with SMTP id 00721157ae682-5689bcc5f56so16112357b3.2 for ; Thu, 08 Jun 2023 17:59:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1686272385; x=1688864385; h=cc:to:from:subject:references:mime-version:message-id:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=ddXgsJixIEMqGA5wc+jEsC/2PCjKU+k92CAoSHzENIQ=; b=2gQvv8Elto4XccdRwaHPDqIj9nLGBVTBNmb86njoPvqhsd0tjtN6HCelUzSemN7wyY 71LauLyB1lnldzxzQTkfe6nQZecdjOxXtr/4StosXGI1CrlQDTJck4wzTXo8dKjjpnV4 D20udOm2zFIzHEQ51hLEe5UarHwCpaC6lXinX2YwMS98bkU6dZgz2pBUAz+mzsFIorM8 xdmbpgNfTyxvCAzBTy+SieKUu3Kw2LKLwSnetOswWodGDZgbdEkzkIsg0JKEhFrOZU8p T4WBKVoS8Yje74KiF7RZvIKnuSmaC0kPLDwvUqdU+Fm/Ozb38xa28j2ttI0hrtP0j54l z55w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686272385; x=1688864385; h=cc:to:from:subject:references:mime-version:message-id:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=ddXgsJixIEMqGA5wc+jEsC/2PCjKU+k92CAoSHzENIQ=; b=CKw/OyrgCxdI82pVA/C9PQ1vfpbTzhS9CXZw8wVaFBPl+vTcCOAiANOkO7aS8vP0UX HwMAqsaIrkI4aEo+bopnssgOc1V+ZwiCXo0EZk/bKQ6/tszRFPj0CWUzSjWj91uDGupe Qs3kOkQuVfQY3JcKRZXACckbwwcGyVP/Bj3sheYXH4F6J1hu1p38afByPF9g4wwx8COX bfaYejBgdRlVh5J9lcxh4FRaJ5bacgs1BaMcsbY+t7Xe9OL+MGp5BdqJYz6ctfqz+yUb Di/s7tZ9qD9bJB+m/WTHJQqkSF9g1SAL0Qb0X0Cs0L41nIZ1cSzgJpBeEEm91rVHuj5U Bg9Q== X-Gm-Message-State: AC+VfDyeKBkkSEPgFXUBuATpYgyv/IOrG3zkp9cT90Sn55xFo8ApJGly Gk6QOSgDtIHR5pjWSndXRgqrOTgjAmQ= X-Google-Smtp-Source: ACHHUZ48Ctq25/jOWo2nOrUYiTkPu+9cUUGT9KZFEWhgs36Jat11A7iC8UGGnM5T4c2tHVmOSHQ7ebLSwlw= X-Received: from yuzhao.bld.corp.google.com ([2620:15c:183:200:f582:c9e5:6c95:4461]) (user=yuzhao job=sendgmr) by 2002:a05:690c:702:b0:565:ebd4:304d with SMTP id bs2-20020a05690c070200b00565ebd4304dmr731769ywb.4.1686272385574; Thu, 08 Jun 2023 17:59:45 -0700 (PDT) Date: Thu, 8 Jun 2023 18:59:43 -0600 In-Reply-To: <20230526234435.662652-1-yuzhao@google.com> Message-Id: <20230609005943.43041-1-yuzhao@google.com> Mime-Version: 1.0 References: <20230526234435.662652-1-yuzhao@google.com> X-Mailer: git-send-email 2.41.0.162.gfafddb0af9-goog Subject: kvm/x86: multichase benchmark From: Yu Zhao To: Andrew Morton , Paolo Bonzini Cc: Alistair Popple , Anup Patel , Ben Gardon , Borislav Petkov , Catalin Marinas , Chao Peng , Christophe Leroy , Dave Hansen , Fabiano Rosas , Gaosheng Cui , Gavin Shan , "H. Peter Anvin" , Ingo Molnar , James Morse , "Jason A. Donenfeld" , Jason Gunthorpe , Jonathan Corbet , Marc Zyngier , Masami Hiramatsu , Michael Ellerman , Michael Larabel , Mike Rapoport , Nicholas Piggin , Oliver Upton , Paul Mackerras , Peter Xu , Sean Christopherson , Steven Rostedt , Suzuki K Poulose , Thomas Gleixner , Thomas Huth , Will Deacon , Zenghui Yu , kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-trace-kernel@vger.kernel.org, x86@kernel.org, linux-mm@google.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org TLDR ==== Multichase in 64 microVMs achieved 6% more total samples (in ~4 hours) after this patchset [1]. Hardware ======== HOST $ lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Address sizes: 43 bits physical, 48 bits virtual Byte Order: Little Endian CPU(s): 128 On-line CPU(s) list: 0-127 Vendor ID: AuthenticAMD Model name: AMD Ryzen Threadripper PRO 3995WX 64-Cores CPU family: 23 Model: 49 Thread(s) per core: 2 Core(s) per socket: 64 Socket(s): 1 Stepping: 0 Frequency boost: disabled CPU max MHz: 4308.3979 CPU min MHz: 2200.0000 BogoMIPS: 5390.20 Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ... Virtualization features: Virtualization: AMD-V Caches (sum of all): L1d: 2 MiB (64 instances) L1i: 2 MiB (64 instances) L2: 32 MiB (64 instances) L3: 256 MiB (16 instances) NUMA: NUMA node(s): 1 NUMA node0 CPU(s): 0-127 Vulnerabilities: Itlb multihit: Not affected L1tf: Not affected Mds: Not affected Meltdown: Not affected Mmio stale data: Not affected Retbleed: Mitigation; untrained return thunk; SMT enabled with STIBP protection Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl Spectre v1: Mitigation; usercopy/swapgs barriers and __user pointer sanitization Spectre v2: Mitigation; Retpolines, IBPB conditional, STIBP always-on, RSB filling, PBRSB-eIBRS Not affected Srbds: Not affected Tsx async abort: Not affected HOST $ numactl -H available: 1 nodes (0) node 0 cpus: 0-127 node 0 size: 257542 MB node 0 free: 224855 MB node distances: node 0 0: 10 HOST $ cat /sys/class/nvme/nvme0/model INTEL SSDPF21Q800GB HOST $ cat /sys/class/nvme/nvme0/numa_node 0 Software ======== HOST $ cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=22.04 DISTRIB_CODENAME=jammy DISTRIB_DESCRIPTION="Ubuntu 22.04.1 LTS" HOST $ uname -a Linux x86 6.4.0-rc5+ #1 SMP PREEMPT_DYNAMIC Wed Jun 7 22:17:47 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux HOST $ cat /proc/swaps Filename Type Size Used Priority /dev/nvme0n1p2 partition 466838356 0 -2 HOST $ cat /sys/kernel/mm/lru_gen/enabled 0x000f HOST $ cat /sys/kernel/mm/transparent_hugepage/enabled always madvise [never] HOST $ cat /sys/kernel/mm/transparent_hugepage/defrag always defer defer+madvise madvise [never] Procedure ========= HOST $ git clone https://github.com/google/multichase HOST $ HOST $ HOST $ cp multichase/multichase ./initrd/bin/ HOST $ sed -i \ "/^maybe_break top$/i multichase -t 2 -m 4g -n 28800; poweroff" \ ./initrd/init HOST $ HOST $ cat run_microvms.sh memcgs=64 run() { path=/sys/fs/cgroup/memcg$1 mkdir $path echo $BASHPID >$path/cgroup.procs qemu-system-x86_64 -M microvm,accel=kvm -cpu host -smp 2 -m 6g \ -nographic -kernel /boot/vmlinuz -initrd ./initrd.img \ -append "console=ttyS0 loglevel=0" } for ((memcg = 0; memcg < $memcgs; memcg++)); do run $memcg & done wait Results ======= Before [1] After Change ---------------------------------------------- Total samples 6824 7237 +6% Notes ===== [1] "mm: rmap: Don't flush TLB after checking PTE young for page reference" was included so that the comparison is apples to Apples. https://lore.kernel.org/r/20220706112041.3831-1-21cnbao@gmail.com/