From patchwork Thu Mar 28 13:38:29 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yunsheng Lin X-Patchwork-Id: 13608550 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 6978BCD1284 for ; Thu, 28 Mar 2024 13:40:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding: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=ImhlWRXvbZcIMYBECVTU9j9TO6/b3RTKXFtC3mkjsj8=; b=ty/4KZ9VaVEaXxjIDd4dm9aEq4 tSYKi2xkM5qTjQr8vnKDjuljm2PzftSX1u0G1N6Cx1ha42Sbh7tcKBE3rj7basV6GyEOKaa8p/ou4 soKoIB8ZqQ2cQhLg3dv4BypHnWQOzsUG1aotkakl80u4pV4DhL1Wp4lnBF4SN8fz1E5ektae5ODcu qE/aW6jGWvZS+Sk54nKbRN0KrFSpqLlhM9GmPmRYcPXKyv2b18i30NzbG9E7ne0+vqQsKHRsR1as5 zlvrUYCfCUmn5MJyiyJ19FFNTkccRhnHGX960eeZVU+Aa/oWfK8u4CYHUZ1adUsCSMhg3qvjdH1Vi 7HWD+3RA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rppzx-0000000E971-09Ou; Thu, 28 Mar 2024 13:40:53 +0000 Received: from szxga07-in.huawei.com ([45.249.212.35]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rppzs-0000000E93w-1eea; Thu, 28 Mar 2024 13:40:50 +0000 Received: from mail.maildlp.com (unknown [172.19.163.44]) by szxga07-in.huawei.com (SkyGuard) with ESMTP id 4V54Ng4jTvz1R88n; Thu, 28 Mar 2024 21:37:55 +0800 (CST) Received: from dggpemm500005.china.huawei.com (unknown [7.185.36.74]) by mail.maildlp.com (Postfix) with ESMTPS id 83CC11402CA; Thu, 28 Mar 2024 21:40:36 +0800 (CST) Received: from localhost.localdomain (10.69.192.56) by dggpemm500005.china.huawei.com (7.185.36.74) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.35; Thu, 28 Mar 2024 21:40:36 +0800 From: Yunsheng Lin To: , , CC: , , Yunsheng Lin , Alexander Duyck , Matthias Brugger , AngeloGioacchino Del Regno , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , , , Subject: [PATCH RFC 00/10] First try to replace page_frag with page_frag_cache Date: Thu, 28 Mar 2024 21:38:29 +0800 Message-ID: <20240328133839.13620-1-linyunsheng@huawei.com> X-Mailer: git-send-email 2.33.0 MIME-Version: 1.0 X-Originating-IP: [10.69.192.56] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To dggpemm500005.china.huawei.com (7.185.36.74) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240328_064048_865503_C950F7E9 X-CRM114-Status: GOOD ( 14.20 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org After [1], Only there are two implementations for page frag: 1. mm/page_alloc.c: net stack seems to be using it in the rx part with 'struct page_frag_cache' and the main API being page_frag_alloc_align(). 2. net/core/sock.c: net stack seems to be using it in the tx part with 'struct page_frag' and the main API being skb_page_frag_refill(). This patchset tries to unfiy the page frag implementation by replacing page_frag with page_frag_cache for sk_page_frag() first. And will try to replace the rest of page_frag in the follow patchset. After this patchset, we are not only able to unify the page frag implementation a little, but seems able to have about 0.5% performance boost testing by using the vhost_net_test introduced in [1] too. Before this patch: Performance counter stats for './vhost_net_test' (10 runs): 603027.29 msec task-clock # 1.756 CPUs utilized ( +- 0.04% ) 2097713 context-switches # 3.479 K/sec ( +- 0.00% ) 212 cpu-migrations # 0.352 /sec ( +- 4.72% ) 40 page-faults # 0.066 /sec ( +- 1.18% ) 467215266413 cycles # 0.775 GHz ( +- 0.12% ) (66.02%) 131736729037 stalled-cycles-frontend # 28.20% frontend cycles idle ( +- 2.38% ) (64.34%) 77728393294 stalled-cycles-backend # 16.64% backend cycles idle ( +- 3.98% ) (65.42%) 345874254764 instructions # 0.74 insn per cycle # 0.38 stalled cycles per insn ( +- 0.75% ) (70.28%) 105166217892 branches # 174.397 M/sec ( +- 0.65% ) (68.56%) 9649321070 branch-misses # 9.18% of all branches ( +- 0.69% ) (65.38%) 343.376 +- 0.147 seconds time elapsed ( +- 0.04% ) After this patch: Performance counter stats for './vhost_net_test' (10 runs): 598081.02 msec task-clock # 1.752 CPUs utilized ( +- 0.11% ) 2097738 context-switches # 3.507 K/sec ( +- 0.00% ) 220 cpu-migrations # 0.368 /sec ( +- 6.58% ) 40 page-faults # 0.067 /sec ( +- 0.92% ) 469788205101 cycles # 0.785 GHz ( +- 0.27% ) (64.86%) 137108509582 stalled-cycles-frontend # 29.19% frontend cycles idle ( +- 0.96% ) (63.62%) 75499065401 stalled-cycles-backend # 16.07% backend cycles idle ( +- 1.04% ) (65.86%) 345469451681 instructions # 0.74 insn per cycle # 0.40 stalled cycles per insn ( +- 0.37% ) (70.16%) 102782224964 branches # 171.853 M/sec ( +- 0.62% ) (69.28%) 9295357532 branch-misses # 9.04% of all branches ( +- 1.08% ) (66.21%) 341.466 +- 0.305 seconds time elapsed ( +- 0.09% ) CC: Alexander Duyck 1. https://lore.kernel.org/all/20240228093013.8263-1-linyunsheng@huawei.com/ Yunsheng Lin (10): mm: Move the page fragment allocator from page_alloc into its own file mm: page_frag: use initial zero offset for page_frag_alloc_align() mm: page_frag: change page_frag_alloc_* API to accept align param mm: page_frag: add '_va' suffix to page_frag API mm: page_frag: add two inline helper for page_frag API mm: page_frag: reuse MSB of 'size' field for pfmemalloc mm: page_frag: reuse existing bit field of 'va' for pagecnt_bias net: introduce the skb_copy_to_va_nocache() helper mm: page_frag: introduce prepare/commit API for page_frag net: replace page_frag with page_frag_cache drivers/net/ethernet/google/gve/gve_rx.c | 4 +- drivers/net/ethernet/intel/ice/ice_txrx.c | 2 +- drivers/net/ethernet/intel/ice/ice_txrx.h | 2 +- drivers/net/ethernet/intel/ice/ice_txrx_lib.c | 2 +- .../net/ethernet/intel/ixgbevf/ixgbevf_main.c | 4 +- .../marvell/octeontx2/nic/otx2_common.c | 2 +- drivers/net/ethernet/mediatek/mtk_wed_wo.c | 4 +- drivers/net/tun.c | 36 ++--- drivers/nvme/host/tcp.c | 8 +- drivers/nvme/target/tcp.c | 22 +-- drivers/vhost/net.c | 6 +- include/linux/gfp.h | 22 --- include/linux/mm_types.h | 18 --- include/linux/page_frag_cache.h | 142 ++++++++++++++++ include/linux/sched.h | 5 +- include/linux/skbuff.h | 15 +- include/net/sock.h | 22 ++- kernel/bpf/cpumap.c | 2 +- kernel/exit.c | 3 +- kernel/fork.c | 2 +- mm/Makefile | 1 + mm/page_alloc.c | 136 ---------------- mm/page_frag_alloc.c | 152 ++++++++++++++++++ net/core/skbuff.c | 54 ++++--- net/core/skmsg.c | 24 +-- net/core/sock.c | 24 +-- net/core/xdp.c | 2 +- net/ipv4/ip_output.c | 37 +++-- net/ipv4/tcp.c | 33 ++-- net/ipv4/tcp_output.c | 30 ++-- net/ipv6/ip6_output.c | 37 +++-- net/kcm/kcmsock.c | 28 ++-- net/mptcp/protocol.c | 72 ++++++--- net/rxrpc/txbuf.c | 16 +- net/sunrpc/svcsock.c | 4 +- net/tls/tls_device.c | 139 +++++++++------- 36 files changed, 661 insertions(+), 451 deletions(-) create mode 100644 include/linux/page_frag_cache.h create mode 100644 mm/page_frag_alloc.c