From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by dpdk.org (Postfix) with ESMTP id DCD192BE1 for ; Thu, 29 Jun 2017 12:57:36 +0200 (CEST) Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga105.jf.intel.com with ESMTP; 29 Jun 2017 03:57:35 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.40,280,1496127600"; d="scan'208";a="986630224" Received: from dpdk15.sh.intel.com ([10.67.111.77]) by orsmga003.jf.intel.com with ESMTP; 29 Jun 2017 03:57:33 -0700 From: Jiayu Hu To: dev@dpdk.org Cc: konstantin.ananyev@intel.com, jianfeng.tan@intel.com, yliu@fridaylinux.org, stephen@networkplumber.org, jingjing.wu@intel.com, tiwei.bie@intel.com, lei.a.yao@intel.com, Jiayu Hu Date: Thu, 29 Jun 2017 18:58:57 +0800 Message-Id: <1498733940-117800-1-git-send-email-jiayu.hu@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1498459430-116048-1-git-send-email-jiayu.hu@intel.com> References: <1498459430-116048-1-git-send-email-jiayu.hu@intel.com> Subject: [dpdk-dev] [PATCH v8 0/3] Support TCP/IPv4 GRO in DPDK X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 29 Jun 2017 10:57:37 -0000 Generic Receive Offload (GRO) is a widely used SW-based offloading technique to reduce per-packet processing overhead. It gains performance by reassembling small packets into large ones. Therefore, we propose to support GRO in DPDK. To enable more flexibility to applications, DPDK GRO is implemented as a user library. Applications explicitly use the GRO library to merge small packets into large ones. DPDK GRO provides two reassembly modes: lightweight mode and heavyweight mode. If applications want to merge packets in a simple way, they can select the lightweight mode API. If applications need more fine-grained controls, they can select the heavyweight mode API. This patchset is to support TCP/IPv4 GRO in DPDK. The first patch is to provide a GRO API framework. The second patch is to support TCP/IPv4 GRO. The last patch is to enable TCP/IPv4 GRO in testpmd. We perform many iperf tests to see the performance gains from DPDK GRO. The test environment is: a. two 25Gbps physical ports (p0 and p1) are linked together. Assign p0 to one networking namespace and assign p1 to DPDK; b. enable TSO for p0. Run iperf client on p0; c. launch testpmd with p1 and a vhost-user port, and run it in csum forwarding mode. Select TCP HW checksum calculation for the vhost-user port in csum forwarding engine. And for better performance, we select IPv4 and TCP HW checksum calculation for p1 too; d. launch a VM with one CPU core and a virtio-net port. The VM OS is ubuntu 16.04 whose virtio-net driver supports GRO. Enables RX csum offloading and mrg_rxbuf for the VM. Iperf server runs in the VM; e. to run iperf tests, we need to avoid the csum forwarding engine compulsorily changes packet mac addresses. SO in our tests, we comment these codes out (line701 ~ line704 in csumonly.c). In each test, we run iperf with the following three configurations: - single flow and single TCP client thread - multiple flows and single TCP client thread - single flow and parallel TCP client threads We run above iperf tests on three scenarios: s1: disabling kernel GRO and enabling DPDK GRO s2: disabling kernel GRO and disabling DPDK GRO s3: enabling kernel GRO and disabling DPDK GRO Comparing the throughput of s1 with s2, we can see the performance gains from DPDK GRO. Comparing the throughput of s1 and s3, we can compare DPDK GRO performance with kernel GRO performance. Test results: - DPDK GRO throughput is almost 2 times than the throughput of no DPDK GRO and no kernel GRO; - DPDK GRO throughput is almost 1.2 times than the throughput of kernel GRO. Change log ========== v8: - merge rte_gro_flush and rte_gro_timeout_flush together and optimize flushing operation - enable rte_gro_reassemble to process N inputted packets - add rte_gro_tbl_item_num to get packet num in the GRO table - add 'lastseg' to struct gro_tcp_item to get last segment faster - add operations to handle rte_malloc failure - use mbuf->l2_len/l3_len/l4_len instead of parsing header - remove 'is_groed' and 'is_valid' in struct gro_tcp_item - fix bugs in gro_tcp4_reassemble - pass start-time as a parameter to avoid frequently calling rte_rdtsc - modify rte_gro_tbl_create prototype - add 'RTE_' to external macros - remove 'goto' - remove inappropriate 'const' - hide internal variables v7: - add a macro 'GRO_MAX_BURST_ITEM_NUM' to avoid stack overflow in rte_gro_reassemble_burst - change macro name (_NB to _NUM) - add '#ifdef __cplusplus ...' in rte_gro.h v6: - avoid checksum validation and calculation - enable to process IP fragmented packets - add a command in testpmd - update documents - modify rte_gro_timeout_flush and rte_gro_reassemble_burst - rename veriable name v5: - fix some bugs - fix coding style issues v4: - implement DPDK GRO as an application-used library - introduce lightweight and heavyweight working modes to enable fine-grained controls to applications - replace cuckoo hash tables with simpler table structure v3: - fix compilation issues. v2: - provide generic reassembly function; - implement GRO as a device ability: add APIs for devices to support GRO; add APIs for applications to enable/disable GRO; - update testpmd example. Jiayu Hu (3): lib: add Generic Receive Offload API framework lib/gro: add TCP/IPv4 GRO support app/testpmd: enable TCP/IPv4 GRO app/test-pmd/cmdline.c | 125 +++++++++ app/test-pmd/config.c | 37 +++ app/test-pmd/csumonly.c | 5 + app/test-pmd/testpmd.c | 3 + app/test-pmd/testpmd.h | 11 + config/common_base | 5 + doc/guides/rel_notes/release_17_08.rst | 7 + doc/guides/testpmd_app_ug/testpmd_funcs.rst | 34 +++ lib/Makefile | 2 + lib/librte_gro/Makefile | 51 ++++ lib/librte_gro/rte_gro.c | 275 +++++++++++++++++++ lib/librte_gro/rte_gro.h | 180 +++++++++++++ lib/librte_gro/rte_gro_tcp.c | 400 ++++++++++++++++++++++++++++ lib/librte_gro/rte_gro_tcp.h | 172 ++++++++++++ lib/librte_gro/rte_gro_version.map | 12 + mk/rte.app.mk | 1 + 16 files changed, 1320 insertions(+) create mode 100644 lib/librte_gro/Makefile create mode 100644 lib/librte_gro/rte_gro.c create mode 100644 lib/librte_gro/rte_gro.h create mode 100644 lib/librte_gro/rte_gro_tcp.c create mode 100644 lib/librte_gro/rte_gro_tcp.h create mode 100644 lib/librte_gro/rte_gro_version.map -- 2.7.4