From patchwork Mon Dec 14 06:53:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicholas Piggin X-Patchwork-Id: 1415834 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4CvXZz5m3Hz9sSf for ; Mon, 14 Dec 2020 18:10:03 +1100 (AEDT) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20161025 header.b=EBV8ywP4; dkim-atps=neutral Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 4CvXZz348ZzDqVK for ; Mon, 14 Dec 2020 18:10:03 +1100 (AEDT) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=gmail.com (client-ip=2607:f8b0:4864:20::533; helo=mail-pg1-x533.google.com; envelope-from=npiggin@gmail.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20161025 header.b=EBV8ywP4; dkim-atps=neutral Received: from mail-pg1-x533.google.com (mail-pg1-x533.google.com [IPv6:2607:f8b0:4864:20::533]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4CvXPF2dgFzDqHS for ; Mon, 14 Dec 2020 18:01:36 +1100 (AEDT) Received: by mail-pg1-x533.google.com with SMTP id w5so11074100pgj.3 for ; Sun, 13 Dec 2020 23:01:36 -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=KZm4cC1DxbG858vs0ptvnD4Oe315ekFOel9NkDKqVqgG/N60LMBFxc0BP8J9O2YhSa OUkRqehyv7TQZuyfZ1UShVN9psItoc/f4Rj90knspxTGpNxRaKZJwM8CVcbCzwpUM+w3 khG/6reDRo/vmQD1dQrIe8HXL7nZDiyG7kZDaWIpJff33ddiZeR19ueLsKkPKCGbq3mt WItIhrNx3WvURgW9eTG6FkzDCzmZUpCgMNyVd8Y+KFNHuw4OvHpST0Ic+N9G2qrROFoj xWHC6pHd+YXjIK7CNfX/aueEkfpw8FGMdbHXS/idkbvon+4IJKAajo9/RStRqIN5JguF X4JQ== X-Gm-Message-State: AOAM532NT5gbU47XoCOqsQoz1Z51KOd4TC5EFws8NW4U84VGvMLe+NuL qhK3FN+pNPcaqypTPUwSWzqBRk/viJ0= 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 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 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, Nicholas Piggin , linux-mm@kvack.org, Andy Lutomirski , linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" 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