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=-15.7 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=unavailable 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 D1DA8C1B0D9 for ; Mon, 14 Dec 2020 07:03:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8D4AC207A0 for ; Mon, 14 Dec 2020 07:03:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2407171AbgLNHCX (ORCPT ); Mon, 14 Dec 2020 02:02:23 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60800 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2407167AbgLNHCO (ORCPT ); Mon, 14 Dec 2020 02:02:14 -0500 Received: from mail-pf1-x435.google.com (mail-pf1-x435.google.com [IPv6:2607:f8b0:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 850B7C061794; Sun, 13 Dec 2020 23:01:34 -0800 (PST) Received: by mail-pf1-x435.google.com with SMTP id x126so2661838pfc.7; Sun, 13 Dec 2020 23:01:34 -0800 (PST) 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=cxv1/xcoFyc0+rLkO7iNlzfTmTCUobsv0mf1a1fJaKs=; b=EBV8ywP4FdjYHK6Zs3pDMM/umySWWxUPltYnJrMBAcmSNSrWDQ9XMhWHy0oK/dZhkt mLuWcdPYgZ1T+rntAUck+SBWkw1wKlUH94Qr46nl4/BWhJw7PzgNFCdnq92WNA9BhoWB s8B9bP0O7v5R2B1SM/hMsaO1bfvOw7EJZu4ZBQi6Io0XQvfLxxp/ScAF6c5nl5Z4gxOY EqAy2QuVQUTiezdjMTmBwRk86RieavdiE+zX/OVFC/wJy1fiIcpfP12XwS8WErhncquo WlvMsM6ce4p/hs3r4DiLYkhtSooj48Kx8Zo4YtnHMIXxP3UmAA3IOmqOGzrTgI7cEb2+ dYQw== 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=cxv1/xcoFyc0+rLkO7iNlzfTmTCUobsv0mf1a1fJaKs=; b=ozl/n2+i/nFBrbtj3TZWkLQOoSRQEOmFMH5ybvFC16UgvM3lViJtdZb6zEeude6QJY ZGqzO3YSi2yMby6877XjdmfJKejR3OjBJQsMmmzASNrcgfLsrGa6cQQAIGnDbUVsd4ca s5/9NoWkyI1ViEemWKRPakq3qKetvFK1xDybYq0Bfed8gd4Ybge5OC1+phpO7hIeNxMN OmKiyxl6LkoYW3iQHk3KufTKwUZvJMj0qq0WfrwXPjjffwJYb4AP1VsLxzau0J9Vny7y J7aHis2lcs4+a0cGqTRzM37S+HIs/bNua7nr7R9f8yzmcFVoq45SKkxSkp5QXAtbrqxy EX1w== X-Gm-Message-State: AOAM533Ns/QxwhDcGaKYWzkAr2ri4k/oY84o1BuJcn54cw/EDQgZaKBT 287gwE2e4tX7zsfL25sjCt7a8aFxruo= X-Google-Smtp-Source: ABdhPJx5AmILXSD1xPGNVdPYIqA2jTn8bVniddzn968H7tbSxzitU/Hs0byrii/p6xSaJmriLmU4jw== X-Received: by 2002:a63:5418:: with SMTP id i24mr22887288pgb.165.1607929293976; Sun, 13 Dec 2020 23:01:33 -0800 (PST) Received: from bobo.ozlabs.ibm.com ([220.240.228.148]) by smtp.gmail.com with ESMTPSA id 84sm19570018pfy.9.2020.12.13.23.01.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 13 Dec 2020 23:01:33 -0800 (PST) From: Nicholas Piggin To: linux-kernel@vger.kernel.org Cc: Nicholas Piggin , linux-arch@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org, Anton Blanchard , Andy Lutomirski Subject: [PATCH v2 5/5] powerpc/64s: enable MMU_LAZY_TLB_SHOOTDOWN Date: Mon, 14 Dec 2020 16:53:12 +1000 Message-Id: <20201214065312.270062-6-npiggin@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20201214065312.270062-1-npiggin@gmail.com> References: <20201214065312.270062-1-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 5181872f9452..356138bdb5bb 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -232,6 +232,7 @@ config PPC select HAVE_PERF_USER_STACK_DUMP select MMU_GATHER_RCU_TABLE_FREE select MMU_GATHER_PAGE_SIZE + select MMU_LAZY_TLB_SHOOTDOWN if PPC_BOOK3S_64 select HAVE_REGS_AND_STACK_ACCESS_API select HAVE_RELIABLE_STACKTRACE if PPC_BOOK3S_64 && CPU_LITTLE_ENDIAN select HAVE_SYSCALL_TRACEPOINTS -- 2.23.0