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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 0BA30C4743C for ; Sat, 5 Jun 2021 01:42:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E75E361208 for ; Sat, 5 Jun 2021 01:42:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231329AbhFEBop (ORCPT ); Fri, 4 Jun 2021 21:44:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54240 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231326AbhFEBoo (ORCPT ); Fri, 4 Jun 2021 21:44:44 -0400 Received: from mail-pg1-x534.google.com (mail-pg1-x534.google.com [IPv6:2607:f8b0:4864:20::534]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D5C28C061767; Fri, 4 Jun 2021 18:42:42 -0700 (PDT) Received: by mail-pg1-x534.google.com with SMTP id o9so6401760pgd.2; Fri, 04 Jun 2021 18:42:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=PZkiKtXqsSUWsFPxoaMD52BWVXcB9txjh0r70N9gfwg=; b=WW4xgRVmullOrJwODXcaph9gCP7wl4/aB45NW6pjILZwERzHDpOslub+OyR7hv6vhX MQF6HrAFrzeiZgWNqLnh7i5L5IUeCDNz4A5ttNpDA19cMy9/mGXcEJT0WbPyaayBmVSB bVOuiJ/6Rsgfw8dJqWBlu/YAJYV8e3PSbOsa4f4K9eWKr2Xgo39e1CSlwj7VCjuDyqVY S0LwDvr6wJcda9KLJjMBlr2BLG4r6PfTk2tg/qAZCN5xG7q7k/UhBG0CDq4/lfxkpqkm 0WECU+QAbnudJ7jXiUtvPGGgerN8eW0cwsDgFdV4SroQ2C6/rCsFRueDEuusyXuNkrHY BuTQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=PZkiKtXqsSUWsFPxoaMD52BWVXcB9txjh0r70N9gfwg=; b=SfzRrxmgYspHlMh9tq8R3vP8n6lfn1RFOGkSA5nTB6xJX9+cYzXWAi9pd8sfNyjEhX mqbAJejGYDZt4UN88WVwTnAiQwwUJ9Mky4bOEezw9TZs81IiKHRsprkmsIpKGy16dJ8U eLYqCHf5JwrLXDW0GICqMk8YS100sbmpZ8u6gz8ABsM1in8ujjVbGYzxi5pWA1b8TTv3 0RWAhe3xCFJtMXt+YQSqfBO5nd5AHhaeuMRVjZqn30n7UryvhOx57AL/KmFdDqOPUTc6 H+RqYKe2Wo0u+piF2llIBPJqLfBwUZBBdbKsdIg98osMuLkfUXF49nClr9BBs47m/vNB 7yYA== X-Gm-Message-State: AOAM532fRw1VCiNQo7nPswV06xJfpcvtoGXFFt5KE8imA9uKzboZ0sQk Mznqz9hBf50aAAmDDhy/xlE= X-Google-Smtp-Source: ABdhPJyb9zARpDDElBpR8QCJlNYPOxW79PfjHchqfbuf/vsgpBZ0bkxI9OwGFQqJfm5GHitbPo8Vnw== X-Received: by 2002:a62:3782:0:b029:2de:903d:8640 with SMTP id e124-20020a6237820000b02902de903d8640mr7135267pfa.40.1622857362398; Fri, 04 Jun 2021 18:42:42 -0700 (PDT) Received: from bobo.ozlabs.ibm.com (60-242-147-73.tpgi.com.au. [60.242.147.73]) by smtp.gmail.com with ESMTPSA id q68sm5779056pjq.45.2021.06.04.18.42.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Jun 2021 18:42:42 -0700 (PDT) From: Nicholas Piggin To: Andrew Morton Cc: Nicholas Piggin , Randy Dunlap , linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org, Anton Blanchard , Andy Lutomirski Subject: [PATCH v4 4/4] powerpc/64s: enable MMU_LAZY_TLB_SHOOTDOWN Date: Sat, 5 Jun 2021 11:42:16 +1000 Message-Id: <20210605014216.446867-5-npiggin@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20210605014216.446867-1-npiggin@gmail.com> References: <20210605014216.446867-1-npiggin@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-arch@vger.kernel.org On a 16-socket 192-core POWER8 system, a context switching benchmark with as many software threads as CPUs (so each switch will go in and out of idle), upstream can achieve a rate of about 1 million context switches per second. After this patch it goes up to 118 million. Signed-off-by: Nicholas Piggin --- arch/powerpc/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 088dd2afcfe4..8a092eedc692 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -252,6 +252,7 @@ config PPC select IRQ_FORCED_THREADING select MMU_GATHER_PAGE_SIZE select MMU_GATHER_RCU_TABLE_FREE + select MMU_LAZY_TLB_SHOOTDOWN if PPC_BOOK3S_64 select MODULES_USE_ELF_RELA select NEED_DMA_MAP_STATE if PPC64 || NOT_COHERENT_CACHE select NEED_SG_DMA_LENGTH -- 2.23.0