<div dir="ltr"><div dir="ltr"> </div> <div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Feb 21, 2024 at 9:40 PM Yaron Illouz <<a href="mailto:yaroni@radcom.com">yaroni@radcom.com</a>> wrote: </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="msg-7692156074670919738"> <div style="overflow-wrap: break-word;" lang="en-IL"> <div class="m_-7692156074670919738WordSection1"> Hi Ori Thank you for your answer it helped me But I can see the load balancing is not done to the same instance for both directions I would like to have ip + port pairs arrive to same instance Now ip1+port1 -> ip2+port2 arrive to instance x and ip2+port2 -> ip1+port1 arrive to another instance How can I solve this? <div> <div style="border-color:rgb(225,225,225) currentcolor currentcolor;border-style:solid none none;border-width:1pt medium medium;padding:3pt 0cm 0cm"> From: Ori Kam <<a href="mailto:orika@nvidia.com" target="_blank">orika@nvidia.com</a>> Sent: Wednesday, February 14, 2024 6:07 PM To: Yaron Illouz <<a href="mailto:yaroni@radcom.com" target="_blank">yaroni@radcom.com</a>>; <a href="mailto:dev@dpdk.org" target="_blank">dev@dpdk.org</a>; '<a href="mailto:users@dpdk.org" target="_blank">users@dpdk.org</a>' <<a href="mailto:users@dpdk.org" target="_blank">users@dpdk.org</a>> Subject: RE: rss calculation as the nic </div> </div> <table style="background:rgb(255,242,204);border-collapse:collapse" cellspacing="0" cellpadding="0" border="0"> <tbody> <tr> <td style="width:432.35pt;background:rgb(251,228,213);padding:0cm 5.4pt" width="576" valign="top"> <a name="m_-7692156074670919738__Hlk88152779">EXTERNAL EMAIL:</a> Do not click links or attachments unless you recognize the sender and know the content is safe </td> </tr> </tbody> </table> <div> Hi Yaron, I can see some possible issues with your code, please see below. </div></div></div></div></blockquote><div>If I understand your case correctly, you need to use a symmetric RSS key. </div><div>We use this one in production - <a href="https://www.ndsl.kaist.edu/~kyoungsoo/papers/TR-symRSS.pdf">https://www.ndsl.kaist.edu/~kyoungsoo/papers/TR-symRSS.pdf</a> </div><div>And you'll need to set it accordingly when configuring the device: port_conf.rx_adv_conf.rss_conf.rss_key = rss_key; port_conf.rx_adv_conf.rss_conf.rss_key_len = rss_key_size; </div><div>HTH. </div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="msg-7692156074670919738"><div style="overflow-wrap: break-word;" lang="en-IL"><div class="m_-7692156074670919738WordSection1"><div> <div style="border-color:currentcolor currentcolor currentcolor blue;border-style:none none none solid;border-width:medium medium medium 1.5pt;padding:0cm 0cm 0cm 4pt"> <div> <div style="border-color:rgb(225,225,225) currentcolor currentcolor;border-style:solid none none;border-width:1pt medium medium;padding:3pt 0cm 0cm"> From: Yaron Illouz <<a href="mailto:yaroni@radcom.com" target="_blank">yaroni@radcom.com</a>> Sent: Saturday, February 3, 2024 7:03 PM To: <a href="mailto:dev@dpdk.org" target="_blank">dev@dpdk.org</a>; '<a href="mailto:users@dpdk.org" target="_blank">users@dpdk.org</a>' <<a href="mailto:users@dpdk.org" target="_blank">users@dpdk.org</a>> Subject: rss calculation as the nic </div> </div> [Snip] static inline uint32_t do_softrss(struct rte_mbuf *m) { uint32_t input_len; struct rte_ipv4_tuple ipv4_tuple; char * pRawPacket = static_cast<char*>(rte_pktmbuf_mtod(pi_mbuf, void* )); IpHeader * pIpHeader = (IpHeader *)(pRawPacket + offsetOfIp); if(pIpHeader->GetVersion()==4) { ipv4_tuple.src_addr = rte_be_to_cpu_32(pIpHeader->dwSrcAddressBigEndian); ipv4_tuple.dst_addr = rte_be_to_cpu_32(pIpHeader->dwDstAddressBigEndian); [Ori] here you are converting BE to CPU ipv4_tuple.sport = *(uint16_t*)(pRawPacket + transportLayerOffset); ipv4_tuple.dport = *(uint16_t*)(pRawPacket + transportLayerOffset+2); [Ori] here you keep the values as BE input_len = RTE_THASH_V4_L3_LEN; return rte_softrss_be((uint32_t *)&ipv4_tuple, input_len, rss_key_be); [Ori] the above function expects to get everything in BE and you should also call rte_convert_rss_key before the use of the above function. } return 0; } new_rss = do_softrss(mbuf_pointer); std::cout<< std::hex << mbuf_pointer->hash.rss << " -> " << new_rss << std::dec << std::endl; And i get a different value than the mbuf_pointer->hash.rss 5ed28a5c -> 33eb33eb 974c1896 -> 24e224e2 1edf1638 -> 21752175 8a54c19 -> 80638063 459a6f76 -> 1b351b35 1cdf1d1c -> e53be53b **** I understand it is possible to do it, but i don't get the same value *** ethtool -i ens5f0 driver: mlx5_core version: 5.8-3.0.7 firmware-version: 22.32.2004 (MT_0000000437) expansion-rom-version: bus-info: 0000:83:00.0 supports-statistics: yes supports-test: yes supports-eeprom-access: no supports-register-dump: no supports-priv-flags: yes </div> </div> </div> </div> </div></blockquote></div></div>