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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C8676ECAAD5 for ; Mon, 29 Aug 2022 15:07:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=F1oLkIcUEWpuwg4n3Ny8+QFjngvyZ0kUWq8m1qPaEH0=; b=Fzradx1ooV+sBL fhli7oRXRyC5llYLYdG2c+VvSSxBXevj3Dw2odmq+GOkqMZn981IvH9i5Ah+eg0y1gcj/+QoIA8SW 9GDR9dWzC41FnI+uIJ08aMBmitfW8Ad9rARugZexUSVRxB7ATsFerEVoXEiAuh6tqgRMTT7RSkS7Z WeNw3XYarEyRZTztnHQ9H8FmYRAAL4Yckz3iHXy+yJ7gqcOYla/s5fclMZtGJINnwmAHU3/fwer+1 R4oRIA+UYwPnExpnFQGVzzce+TXHgs/sQ/cVLrrTyk4+9TDQwhy4SzlUApZbI+WfAwEPGVShs598x rts7HNIuM2SlhEXgGCMg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oSgLy-00BGUW-3E; Mon, 29 Aug 2022 15:07:06 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oSgLu-00BGTe-OK for linux-riscv@lists.infradead.org; Mon, 29 Aug 2022 15:07:04 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id B0811610FB; Mon, 29 Aug 2022 15:06:58 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 954FDC433C1; Mon, 29 Aug 2022 15:06:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1661785618; bh=K2Sqs5g2tp+43xxFZspN1D8v3qOT6RryXTyaXO3QnJY=; h=From:To:Cc:Subject:Date:From; b=YYXlnOUgStpRCiFT6xNptSzJyFRT4JucbhZeoUfkRrgmPajuUSeKoR2RX375IVAwW fWUicxuedS/yJYoXbHl4oSA/B2FW4Hz1VP9bGfUEJlbJX8b/18ozyR5dvuBNk65C/1 0qtiP53v9e830gxaaZCnzYMnKam3CbPRjQ4nOKmzqo5F3Jj+l1hxIot9mlt3Y0BGiL fKvlG2pZGtIPoSDEMmqaV1Mh/qCP9u7wSb8asYue/vJJuJQ8Lc0UToDR4WpIVVJLP9 Ew2MdR07uCX8N1dG2rJ8pMmJIueJ2b/CS8S5qxyNZBtoIJx5RjYNRLyepRzDAfq1Qb SMTZRKKlK8L/g== From: Jisheng Zhang To: Paul Walmsley , Palmer Dabbelt , Albert Ou Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Andrew Jones , Conor Dooley Subject: [PATCH v3] riscv: enable THP_SWAP for RV64 Date: Mon, 29 Aug 2022 22:57:42 +0800 Message-Id: <20220829145742.3139-1-jszhang@kernel.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220829_080702_926539_4D7A1605 X-CRM114-Status: UNSURE ( 8.52 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org I have a Sipeed Lichee RV dock board which only has 512MB DDR, so memory optimizations such as swap on zram are helpful. As is seen in commit d0637c505f8a ("arm64: enable THP_SWAP for arm64") and commit bd4c82c22c367e ("mm, THP, swap: delay splitting THP after swapped out"), THP_SWAP can improve the swap throughput significantly. Enable THP_SWAP for RV64, testing the micro-benchmark which is introduced by commit d0637c505f8a ("arm64: enable THP_SWAP for arm64") shows below numbers on the Lichee RV dock board: swp out bandwidth w/o patch: 66908 bytes/ms (mean of 10 tests) swp out bandwidth w/ patch: 322638 bytes/ms (mean of 10 tests) Improved by 382%! Signed-off-by: Jisheng Zhang Reviewed-by: Andrew Jones Reviewed-by: Conor Dooley --- Since v2: - correct reviewed-by tag - update commit msg Since v1: - collect reviewed-by tag - make ARCH_WANTS_THP_SWAP rely on HAVE_ARCH_TRANSPARENT_HUGEPAGE instead arch/riscv/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index ed66c31e4655..79e52441e18b 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -45,6 +45,7 @@ config RISCV select ARCH_WANT_FRAME_POINTERS select ARCH_WANT_GENERAL_HUGETLB select ARCH_WANT_HUGE_PMD_SHARE if 64BIT + select ARCH_WANTS_THP_SWAP if HAVE_ARCH_TRANSPARENT_HUGEPAGE select BINFMT_FLAT_NO_DATA_START_OFFSET if !MMU select BUILDTIME_TABLE_SORT if MMU select CLONE_BACKWARDS -- 2.34.1 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv