From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 1773DA052F; Mon, 10 Feb 2020 15:02:32 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 287DF1BDAE; Mon, 10 Feb 2020 15:02:30 +0100 (CET) Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by dpdk.org (Postfix) with ESMTP id 19CDC4C74; Mon, 10 Feb 2020 15:02:27 +0100 (CET) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 10 Feb 2020 06:02:22 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,425,1574150400"; d="scan'208";a="312755594" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.20]) ([10.237.221.20]) by orsmga001.jf.intel.com with ESMTP; 10 Feb 2020 06:02:20 -0800 To: Viacheslav Ovsiienko , dev@dpdk.org Cc: thomas@monjalon.net, bernard.iremonger@intel.com, stable@dpdk.org References: <1581267759-698-1-git-send-email-viacheslavo@mellanox.com> From: Ferruh Yigit Autocrypt: addr=ferruh.yigit@intel.com; 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charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Subject: Re: [dpdk-dev] [dpdk-stable] [PATCH] app/testpmd: fix txonly flow generation entropy 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: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On 2/9/2020 5:02 PM, Viacheslav Ovsiienko wrote: > The testpmd application in txonly forwarding mode has an option > to generate the packet flows by varying the destination IP address. > The patch increments the IP for each packet sent, this improves > the entropy and RSS distibution on the peer receiving size > is getting more uniform. The IP address already incremented for each packet sent [1], I can't see what this patch adds. [1] http://lxr.dpdk.org/dpdk/v19.11/source/app/test-pmd/txonly.c#L208 btw, for reference the option mentioned is "--txonly-multi-flow" and it has been added with: commit: 82010ef55e7c ("app/testpmd: make txonly mode generate multiple flows") > > Fixes: 82010ef55e7c ("app/testpmd: make txonly mode generate multiple flows") > Cc: stable@dpdk.org > > Signed-off-by: Viacheslav Ovsiienko > --- > app/test-pmd/txonly.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/app/test-pmd/txonly.c b/app/test-pmd/txonly.c > index 4b5bec4..8a1989f 100644 > --- a/app/test-pmd/txonly.c > +++ b/app/test-pmd/txonly.c > @@ -153,7 +153,6 @@ > const uint16_t vlan_tci_outer, const uint64_t ol_flags) > { > struct rte_mbuf *pkt_segs[RTE_MAX_SEGS_PER_PKT]; > - uint8_t ip_var = RTE_PER_LCORE(_ip_var); > struct rte_mbuf *pkt_seg; > uint32_t nb_segs, pkt_len; > uint8_t i; > @@ -193,6 +192,7 @@ > copy_buf_to_pkt(&pkt_ip_hdr, sizeof(pkt_ip_hdr), pkt, > sizeof(struct rte_ether_hdr)); > if (txonly_multi_flow) { > + uint8_t ip_var = RTE_PER_LCORE(_ip_var); > struct rte_ipv4_hdr *ip_hdr; > uint32_t addr; > > @@ -208,6 +208,7 @@ > */ > addr = (tx_ip_dst_addr | (ip_var++ << 8)) + rte_lcore_id(); > ip_hdr->src_addr = rte_cpu_to_be_32(addr); > + RTE_PER_LCORE(_ip_var) = ip_var; > } > copy_buf_to_pkt(&pkt_udp_hdr, sizeof(pkt_udp_hdr), pkt, > sizeof(struct rte_ether_hdr) + > @@ -315,7 +316,7 @@ > fs->tx_packets += nb_tx; > > if (txonly_multi_flow) > - RTE_PER_LCORE(_ip_var) += nb_tx; > + RTE_PER_LCORE(_ip_var) -= nb_pkt - nb_tx; > > #ifdef RTE_TEST_PMD_RECORD_BURST_STATS > fs->tx_burst_stats.pkt_burst_spread[nb_tx]++; >