* Re: Symmetric RSS Hashing support in DPDK [not found] <CDE5E416-0537-498B-BE79-D351B4051D99@cisco.com> @ 2024-03-31 11:47 ` Shaul Hamoi (shamoi) 2024-04-01 16:40 ` Shaul Hamoi (shamoi) 0 siblings, 1 reply; 6+ messages in thread From: Shaul Hamoi (shamoi) @ 2024-03-31 11:47 UTC (permalink / raw) To: sismis; +Cc: Balakrishnan.K1, stephen, users [-- Attachment #1: Type: text/plain, Size: 4093 bytes --] Hi, I am looking to determine the target queue for a flow in advance I’m using dpdk-rss-flows.py to calculate the Toeplitz hash with I40E key. However, If I use the script as is, I don’t obtain the correct queue because the hash calculation isn’t symmetric. I have attempted to XOR the source and destination IP addresses and source and destination port before performing the calculation but I still don’t get the correct queue. In case you use RTE_ETH_HASH_SYMMETRIC_TOEPLITZ , the I40E key doesn’t change - Right ? How do I find that the NIC does for symmetric hash so I can simulate it ? (src="1.0.0.1", dst="2.0.0.2")/TCP(sport=8819, dport=80) Actual queue - 7 (32 RX queues) Result with XOR: dpdk-rss-flows.py -s 8819 -d 80 -k i40e 32 1.0.0.1 2.0.0.2 SRC_IP SPORT DST_IP DPORT QUEUE 1.0.0.1 8819 2.0.0.2 80 19 Result without (original script): dpdk-rss-flows.py -s 8819 -d 80 -k i40e 32 1.0.0.1 2.0.0.2 SRC_IP SPORT DST_IP DPORT QUEUE 1.0.0.1 8819 2.0.0.2 80 20 Thanks in advance, Shaul. From: "Lukáš Šišmiš" <sismis@cesnet.cz> To: Balakrishnan K <Balakrishnan.K1@tatacommunications.com>, Stephen Hemminger <stephen@networkplumber.org> Cc: "users@dpdk.org" <users@dpdk.org> Subject: Re: Symmetric RSS Hashing support in DPDK<https://inbox.dpdk.org/users/90dc11cf-8c60-4b90-a3fc-43b2351b6c93@cesnet.cz/#r> Date: Fri, 8 Mar 2024 08:29:32 +0100 [thread overview]<https://inbox.dpdk.org/users/90dc11cf-8c60-4b90-a3fc-43b2351b6c93@cesnet.cz/#r> Message-ID: <90dc11cf-8c60-4b90-a3fc-43b2351b6c93@cesnet.cz> (raw<https://inbox.dpdk.org/users/90dc11cf-8c60-4b90-a3fc-43b2351b6c93@cesnet.cz/raw>) In-Reply-To: <PSAPR04MB551616841D8221851FF79214D6272@PSAPR04MB5516.apcprd04.prod.outlook.com<https://inbox.dpdk.org/users/PSAPR04MB551616841D8221851FF79214D6272@PSAPR04MB5516.apcprd04.prod.outlook.com/>> Hi all, I've made minimalist example app on how to set symmetric RSS support for X710 that uses RTE_FLOW rules - check it out here: https://github.com/lukashino/i40e-symmetric-rss-rte-flow Lukas On 08. 03. 24 6:53, Balakrishnan K wrote: > Hi Stephen, > Thanks for the response . I will below option and come back if any help required. > > Regards, > Bala > > -----Original Message----- > From: Stephen Hemminger <stephen@networkplumber.org> > Sent: Wednesday, March 6, 2024 8:34 PM > To: Balakrishnan K <Balakrishnan.K1@tatacommunications.com> > Cc: users@dpdk.org > Subject: Re: Symmetric RSS Hashing support in DPDK > > CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. > > On Wed, 6 Mar 2024 07:28:40 +0000 > Balakrishnan K <Balakrishnan.K1@tatacommunications.com> wrote: > >> Hello, >> Our application needs symmetric hashing to handle the reverse >> traffic on the same core, also to Improve performance by distributing the traffic across core. >> Tried using rss config as below . >> action_rss_tcp.types = ETH_RSS_NONFRAG_IPV4_TCP | ETH_RSS_L3_SRC_ONLY| >> ETH_RSS_L3_DST_ONLY | ETH_RSS_L4_SRC_ONLY | ETH_RSS_L4_DST_ONLY; but could not get desired result. >> Is there any options or API available to enable symmetric RSS hashing . >> We are using dpdk 20.11 and intel NIC X710 10GbE . >> >> Regards, >> Bala > With XL710 there are two choices: > 1. Set RSS hash function to RTE_ETH_HASH_SYMMETRIC_TOEPLITZ in > the rte_eth_rss_conf passed in during configure > 2. Use default (non symmetric TOEPLITZ) but pass in a rss_key that > has duplicated bits in the right place. Like: > > 0x6d5a 0x6d5a 0x6d5a 0x6d5a > 0x6d5a 0x6d5a 0x6d5a 0x6d5a > 0x6d5a 0x6d5a 0x6d5a 0x6d5a > 0x6d5a 0x6d5a 0x6d5a 0x6d5a > 0x6d5a 0x6d5a 0x6d5a 0x6d5a > > https://www.ndsl.kaist.edu/~kyoungsoo/papers/TR-symRSS.pdf [-- Attachment #2: Type: text/html, Size: 12290 bytes --] ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Symmetric RSS Hashing support in DPDK 2024-03-31 11:47 ` Symmetric RSS Hashing support in DPDK Shaul Hamoi (shamoi) @ 2024-04-01 16:40 ` Shaul Hamoi (shamoi) 0 siblings, 0 replies; 6+ messages in thread From: Shaul Hamoi (shamoi) @ 2024-04-01 16:40 UTC (permalink / raw) To: sismis; +Cc: Balakrishnan.K1, stephen, users [-- Attachment #1: Type: text/plain, Size: 4649 bytes --] OK, I found my issue. The input to the hash function should include all 4 parameters also in case of symmetic: (SRC_IP^DST_IP , SRC_IP^DST_IP, SRC_PORT^DST_PORT, SRC_PORT^DST_PORT) Shaul. From: Shaul Hamoi (shamoi) <shamoi@cisco.com> Date: Sunday, 31 March 2024 at 14:48 To: sismis@cesnet.cz <sismis@cesnet.cz> Cc: Balakrishnan.K1@tatacommunications.com <Balakrishnan.K1@tatacommunications.com>, stephen@networkplumber.org <stephen@networkplumber.org>, users@dpdk.org <users@dpdk.org> Subject: Re: Symmetric RSS Hashing support in DPDK Hi, I am looking to determine the target queue for a flow in advance I’m using dpdk-rss-flows.py to calculate the Toeplitz hash with I40E key. However, If I use the script as is, I don’t obtain the correct queue because the hash calculation isn’t symmetric. I have attempted to XOR the source and destination IP addresses and source and destination port before performing the calculation but I still don’t get the correct queue. In case you use RTE_ETH_HASH_SYMMETRIC_TOEPLITZ , the I40E key doesn’t change - Right ? How do I find that the NIC does for symmetric hash so I can simulate it ? (src="1.0.0.1", dst="2.0.0.2")/TCP(sport=8819, dport=80) Actual queue - 7 (32 RX queues) Result with XOR: dpdk-rss-flows.py -s 8819 -d 80 -k i40e 32 1.0.0.1 2.0.0.2 SRC_IP SPORT DST_IP DPORT QUEUE 1.0.0.1 8819 2.0.0.2 80 19 Result without (original script): dpdk-rss-flows.py -s 8819 -d 80 -k i40e 32 1.0.0.1 2.0.0.2 SRC_IP SPORT DST_IP DPORT QUEUE 1.0.0.1 8819 2.0.0.2 80 20 Thanks in advance, Shaul. From: "Lukáš Šišmiš" <sismis@cesnet.cz> To: Balakrishnan K <Balakrishnan.K1@tatacommunications.com>, Stephen Hemminger <stephen@networkplumber.org> Cc: "users@dpdk.org" <users@dpdk.org> Subject: Re: Symmetric RSS Hashing support in DPDK<https://inbox.dpdk.org/users/90dc11cf-8c60-4b90-a3fc-43b2351b6c93@cesnet.cz/#r> Date: Fri, 8 Mar 2024 08:29:32 +0100 [thread overview]<https://inbox.dpdk.org/users/90dc11cf-8c60-4b90-a3fc-43b2351b6c93@cesnet.cz/#r> Message-ID: <90dc11cf-8c60-4b90-a3fc-43b2351b6c93@cesnet.cz> (raw<https://inbox.dpdk.org/users/90dc11cf-8c60-4b90-a3fc-43b2351b6c93@cesnet.cz/raw>) In-Reply-To: <PSAPR04MB551616841D8221851FF79214D6272@PSAPR04MB5516.apcprd04.prod.outlook.com<https://inbox.dpdk.org/users/PSAPR04MB551616841D8221851FF79214D6272@PSAPR04MB5516.apcprd04.prod.outlook.com/>> Hi all, I've made minimalist example app on how to set symmetric RSS support for X710 that uses RTE_FLOW rules - check it out here: https://github.com/lukashino/i40e-symmetric-rss-rte-flow Lukas On 08. 03. 24 6:53, Balakrishnan K wrote: > Hi Stephen, > Thanks for the response . I will below option and come back if any help required. > > Regards, > Bala > > -----Original Message----- > From: Stephen Hemminger <stephen@networkplumber.org> > Sent: Wednesday, March 6, 2024 8:34 PM > To: Balakrishnan K <Balakrishnan.K1@tatacommunications.com> > Cc: users@dpdk.org > Subject: Re: Symmetric RSS Hashing support in DPDK > > CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. > > On Wed, 6 Mar 2024 07:28:40 +0000 > Balakrishnan K <Balakrishnan.K1@tatacommunications.com> wrote: > >> Hello, >> Our application needs symmetric hashing to handle the reverse >> traffic on the same core, also to Improve performance by distributing the traffic across core. >> Tried using rss config as below . >> action_rss_tcp.types = ETH_RSS_NONFRAG_IPV4_TCP | ETH_RSS_L3_SRC_ONLY| >> ETH_RSS_L3_DST_ONLY | ETH_RSS_L4_SRC_ONLY | ETH_RSS_L4_DST_ONLY; but could not get desired result. >> Is there any options or API available to enable symmetric RSS hashing . >> We are using dpdk 20.11 and intel NIC X710 10GbE . >> >> Regards, >> Bala > With XL710 there are two choices: > 1. Set RSS hash function to RTE_ETH_HASH_SYMMETRIC_TOEPLITZ in > the rte_eth_rss_conf passed in during configure > 2. Use default (non symmetric TOEPLITZ) but pass in a rss_key that > has duplicated bits in the right place. Like: > > 0x6d5a 0x6d5a 0x6d5a 0x6d5a > 0x6d5a 0x6d5a 0x6d5a 0x6d5a > 0x6d5a 0x6d5a 0x6d5a 0x6d5a > 0x6d5a 0x6d5a 0x6d5a 0x6d5a > 0x6d5a 0x6d5a 0x6d5a 0x6d5a > > https://www.ndsl.kaist.edu/~kyoungsoo/papers/TR-symRSS.pdf [-- Attachment #2: Type: text/html, Size: 13902 bytes --] ^ permalink raw reply [flat|nested] 6+ messages in thread
* Symmetric RSS Hashing support in DPDK @ 2024-03-06 7:28 Balakrishnan K 2024-03-06 15:03 ` Stephen Hemminger 0 siblings, 1 reply; 6+ messages in thread From: Balakrishnan K @ 2024-03-06 7:28 UTC (permalink / raw) To: users [-- Attachment #1: Type: text/plain, Size: 520 bytes --] Hello, Our application needs symmetric hashing to handle the reverse traffic on the same core, also to Improve performance by distributing the traffic across core. Tried using rss config as below . action_rss_tcp.types = ETH_RSS_NONFRAG_IPV4_TCP | ETH_RSS_L3_SRC_ONLY| ETH_RSS_L3_DST_ONLY | ETH_RSS_L4_SRC_ONLY | ETH_RSS_L4_DST_ONLY; but could not get desired result. Is there any options or API available to enable symmetric RSS hashing . We are using dpdk 20.11 and intel NIC X710 10GbE . Regards, Bala [-- Attachment #2: Type: text/html, Size: 2676 bytes --] ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Symmetric RSS Hashing support in DPDK 2024-03-06 7:28 Balakrishnan K @ 2024-03-06 15:03 ` Stephen Hemminger 2024-03-08 5:53 ` Balakrishnan K 0 siblings, 1 reply; 6+ messages in thread From: Stephen Hemminger @ 2024-03-06 15:03 UTC (permalink / raw) To: Balakrishnan K; +Cc: users On Wed, 6 Mar 2024 07:28:40 +0000 Balakrishnan K <Balakrishnan.K1@tatacommunications.com> wrote: > Hello, > Our application needs symmetric hashing to handle the reverse traffic on the same core, also to > Improve performance by distributing the traffic across core. > Tried using rss config as below . > action_rss_tcp.types = ETH_RSS_NONFRAG_IPV4_TCP | ETH_RSS_L3_SRC_ONLY| ETH_RSS_L3_DST_ONLY | ETH_RSS_L4_SRC_ONLY | ETH_RSS_L4_DST_ONLY; > but could not get desired result. > Is there any options or API available to enable symmetric RSS hashing . > We are using dpdk 20.11 and intel NIC X710 10GbE . > > Regards, > Bala With XL710 there are two choices: 1. Set RSS hash function to RTE_ETH_HASH_SYMMETRIC_TOEPLITZ in the rte_eth_rss_conf passed in during configure 2. Use default (non symmetric TOEPLITZ) but pass in a rss_key that has duplicated bits in the right place. Like: 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a https://www.ndsl.kaist.edu/~kyoungsoo/papers/TR-symRSS.pdf ^ permalink raw reply [flat|nested] 6+ messages in thread
* RE: Symmetric RSS Hashing support in DPDK 2024-03-06 15:03 ` Stephen Hemminger @ 2024-03-08 5:53 ` Balakrishnan K 2024-03-08 7:29 ` Lukáš Šišmiš 0 siblings, 1 reply; 6+ messages in thread From: Balakrishnan K @ 2024-03-08 5:53 UTC (permalink / raw) To: Stephen Hemminger; +Cc: users Hi Stephen, Thanks for the response . I will below option and come back if any help required. Regards, Bala -----Original Message----- From: Stephen Hemminger <stephen@networkplumber.org> Sent: Wednesday, March 6, 2024 8:34 PM To: Balakrishnan K <Balakrishnan.K1@tatacommunications.com> Cc: users@dpdk.org Subject: Re: Symmetric RSS Hashing support in DPDK CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. On Wed, 6 Mar 2024 07:28:40 +0000 Balakrishnan K <Balakrishnan.K1@tatacommunications.com> wrote: > Hello, > Our application needs symmetric hashing to handle the reverse > traffic on the same core, also to Improve performance by distributing the traffic across core. > Tried using rss config as below . > action_rss_tcp.types = ETH_RSS_NONFRAG_IPV4_TCP | ETH_RSS_L3_SRC_ONLY| > ETH_RSS_L3_DST_ONLY | ETH_RSS_L4_SRC_ONLY | ETH_RSS_L4_DST_ONLY; but could not get desired result. > Is there any options or API available to enable symmetric RSS hashing . > We are using dpdk 20.11 and intel NIC X710 10GbE . > > Regards, > Bala With XL710 there are two choices: 1. Set RSS hash function to RTE_ETH_HASH_SYMMETRIC_TOEPLITZ in the rte_eth_rss_conf passed in during configure 2. Use default (non symmetric TOEPLITZ) but pass in a rss_key that has duplicated bits in the right place. Like: 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a 0x6d5a https://www.ndsl.kaist.edu/~kyoungsoo/papers/TR-symRSS.pdf ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Symmetric RSS Hashing support in DPDK 2024-03-08 5:53 ` Balakrishnan K @ 2024-03-08 7:29 ` Lukáš Šišmiš 0 siblings, 0 replies; 6+ messages in thread From: Lukáš Šišmiš @ 2024-03-08 7:29 UTC (permalink / raw) To: Balakrishnan K, Stephen Hemminger; +Cc: users Hi all, I've made minimalist example app on how to set symmetric RSS support for X710 that uses RTE_FLOW rules - check it out here: https://github.com/lukashino/i40e-symmetric-rss-rte-flow Lukas On 08. 03. 24 6:53, Balakrishnan K wrote: > Hi Stephen, > Thanks for the response . I will below option and come back if any help required. > > Regards, > Bala > > -----Original Message----- > From: Stephen Hemminger <stephen@networkplumber.org> > Sent: Wednesday, March 6, 2024 8:34 PM > To: Balakrishnan K <Balakrishnan.K1@tatacommunications.com> > Cc: users@dpdk.org > Subject: Re: Symmetric RSS Hashing support in DPDK > > CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. > > On Wed, 6 Mar 2024 07:28:40 +0000 > Balakrishnan K <Balakrishnan.K1@tatacommunications.com> wrote: > >> Hello, >> Our application needs symmetric hashing to handle the reverse >> traffic on the same core, also to Improve performance by distributing the traffic across core. >> Tried using rss config as below . >> action_rss_tcp.types = ETH_RSS_NONFRAG_IPV4_TCP | ETH_RSS_L3_SRC_ONLY| >> ETH_RSS_L3_DST_ONLY | ETH_RSS_L4_SRC_ONLY | ETH_RSS_L4_DST_ONLY; but could not get desired result. >> Is there any options or API available to enable symmetric RSS hashing . >> We are using dpdk 20.11 and intel NIC X710 10GbE . >> >> Regards, >> Bala > With XL710 there are two choices: > 1. Set RSS hash function to RTE_ETH_HASH_SYMMETRIC_TOEPLITZ in > the rte_eth_rss_conf passed in during configure > 2. Use default (non symmetric TOEPLITZ) but pass in a rss_key that > has duplicated bits in the right place. Like: > > 0x6d5a 0x6d5a 0x6d5a 0x6d5a > 0x6d5a 0x6d5a 0x6d5a 0x6d5a > 0x6d5a 0x6d5a 0x6d5a 0x6d5a > 0x6d5a 0x6d5a 0x6d5a 0x6d5a > 0x6d5a 0x6d5a 0x6d5a 0x6d5a > > https://www.ndsl.kaist.edu/~kyoungsoo/papers/TR-symRSS.pdf ^ permalink raw reply [flat|nested] 6+ messages in thread
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[not found] <CDE5E416-0537-498B-BE79-D351B4051D99@cisco.com>
2024-03-31 11:47 ` Symmetric RSS Hashing support in DPDK Shaul Hamoi (shamoi)
2024-04-01 16:40 ` Shaul Hamoi (shamoi)
2024-03-06 7:28 Balakrishnan K
2024-03-06 15:03 ` Stephen Hemminger
2024-03-08 5:53 ` Balakrishnan K
2024-03-08 7:29 ` Lukáš Šišmiš
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