X-Git-Url: https://gerrit.fd.io/r/gitweb?p=csit.git;a=blobdiff_plain;f=tests%2Fsuites%2Fperformance%2FLong_Bridge_Domain_Intel-X520-DA2.robot;h=3a3db169ee8206790af8c8453b78df6787bdd876;hp=710c01e8f6cc920d5a3d06372521a9f8c750597d;hb=a74531b4483ae9122ba18e064cd20b8550039d21;hpb=800ff9b53f5c861e4625509d1403c1cb4606583b diff --git a/tests/suites/performance/Long_Bridge_Domain_Intel-X520-DA2.robot b/tests/suites/performance/Long_Bridge_Domain_Intel-X520-DA2.robot index 710c01e8f6..3a3db169ee 100644 --- a/tests/suites/performance/Long_Bridge_Domain_Intel-X520-DA2.robot +++ b/tests/suites/performance/Long_Bridge_Domain_Intel-X520-DA2.robot @@ -34,14 +34,14 @@ | | [Documentation] | | ... | Find throughput with non drop rate for 64B frames by using | | ... | binary search with threshold 0.1Mpps. -| | [Tags] | 1_THREAD_NOHTT_RSS_1 | SINGLE_THREAD | NDR +| | [Tags] | 1_THREAD_NOHTT_RXQUEUES_1 | SINGLE_THREAD | NDR | | ${framesize}= | Set Variable | 64 | | ${min_rate}= | Set Variable | 100000 | | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_64B} | | ${binary_min}= | Set Variable | ${min_rate} | | ${binary_max}= | Set Variable | ${max_rate} | | ${threshold}= | Set Variable | ${min_rate} -| | Given Add '1' worker threads and rss '1' without HTT to all DUTs +| | Given Add '1' worker threads and rxqueues '1' without HTT to all DUTs | | And Add all PCI devices to all DUTs | | And Add No Multi Seg to all DUTs | | And Apply startup configuration on all VPP DUTs @@ -56,14 +56,14 @@ | | ... | Find throughput with partial drop rate for 64B frames by using | | ... | binary search with threshold 0.1Mpps. Loss acceptance is set to 0.5 | | ... | percent of transmitted packets. -| | [Tags] | 1_THREAD_NOHTT_RSS_1 | SINGLE_THREAD | PDR +| | [Tags] | 1_THREAD_NOHTT_RXQUEUES_1 | SINGLE_THREAD | PDR | | ${framesize}= | Set Variable | 64 | | ${min_rate}= | Set Variable | 100000 | | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_64B} | | ${binary_min}= | Set Variable | ${min_rate} | | ${binary_max}= | Set Variable | ${max_rate} | | ${threshold}= | Set Variable | ${min_rate} -| | Given Add '1' worker threads and rss '1' without HTT to all DUTs +| | Given Add '1' worker threads and rxqueues '1' without HTT to all DUTs | | And Add all PCI devices to all DUTs | | And Add No Multi Seg to all DUTs | | And Apply startup configuration on all VPP DUTs @@ -79,14 +79,14 @@ | | [Documentation] | | ... | Find throughput with non drop rate for 1518B frames by using | | ... | binary search with threshold 10,000pps. -| | [Tags] | 1_THREAD_NOHTT_RSS_1 | SINGLE_THREAD | NDR +| | [Tags] | 1_THREAD_NOHTT_RXQUEUES_1 | SINGLE_THREAD | NDR | | ${framesize}= | Set Variable | 1518 | | ${min_rate}= | Set Variable | 10000 | | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_1518B} | | ${binary_min}= | Set Variable | ${min_rate} | | ${binary_max}= | Set Variable | ${max_rate} | | ${threshold}= | Set Variable | ${min_rate} -| | Given Add '1' worker threads and rss '1' without HTT to all DUTs +| | Given Add '1' worker threads and rxqueues '1' without HTT to all DUTs | | And Add all PCI devices to all DUTs | | And Add No Multi Seg to all DUTs | | And Apply startup configuration on all VPP DUTs @@ -101,14 +101,14 @@ | | ... | Find throughput with partial drop rate for 1518B frames by using | | ... | binary search with threshold 10,000pps. Loss acceptance is set to 0.5 | | ... | percent of transmitted packets. -| | [Tags] | 1_THREAD_NOHTT_RSS_1 | SINGLE_THREAD | PDR +| | [Tags] | 1_THREAD_NOHTT_RXQUEUES_1 | SINGLE_THREAD | PDR | | ${framesize}= | Set Variable | 1518 | | ${min_rate}= | Set Variable | 10000 | | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_1518B} | | ${binary_min}= | Set Variable | ${min_rate} | | ${binary_max}= | Set Variable | ${max_rate} | | ${threshold}= | Set Variable | ${min_rate} -| | Given Add '1' worker threads and rss '1' without HTT to all DUTs +| | Given Add '1' worker threads and rxqueues '1' without HTT to all DUTs | | And Add all PCI devices to all DUTs | | And Add No Multi Seg to all DUTs | | And Apply startup configuration on all VPP DUTs @@ -124,14 +124,14 @@ | | [Documentation] | | ... | Find throughput with non drop rate for 9000B frames by using | | ... | binary search with threshold of 5,000pps. -| | [Tags] | 1_THREAD_NOHTT_RSS_1 | SINGLE_THREAD | NDR +| | [Tags] | 1_THREAD_NOHTT_RXQUEUES_1 | SINGLE_THREAD | NDR | | ${framesize}= | Set Variable | 9000 | | ${min_rate}= | Set Variable | 5000 | | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_9000B} | | ${binary_min}= | Set Variable | ${min_rate} | | ${binary_max}= | Set Variable | ${max_rate} | | ${threshold}= | Set Variable | ${min_rate} -| | Given Add '1' worker threads and rss '1' without HTT to all DUTs +| | Given Add '1' worker threads and rxqueues '1' without HTT to all DUTs | | And Add all PCI devices to all DUTs | | And Apply startup configuration on all VPP DUTs | | And L2 bridge domain initialized in a 3-node circular topology @@ -145,14 +145,14 @@ | | ... | Find throughput with partial drop rate for 9000B frames by using | | ... | binary search with threshold of 5,000pps. Loss acceptance is set to | | ... | 0.5 percent of transmitted packets. -| | [Tags] | 1_THREAD_NOHTT_RSS_1 | SINGLE_THREAD | PDR +| | [Tags] | 1_THREAD_NOHTT_RXQUEUES_1 | SINGLE_THREAD | PDR | | ${framesize}= | Set Variable | 9000 | | ${min_rate}= | Set Variable | 5000 | | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_9000B} | | ${binary_min}= | Set Variable | ${min_rate} | | ${binary_max}= | Set Variable | ${max_rate} | | ${threshold}= | Set Variable | ${min_rate} -| | Given Add '1' worker threads and rss '1' without HTT to all DUTs +| | Given Add '1' worker threads and rxqueues '1' without HTT to all DUTs | | And Add all PCI devices to all DUTs | | And Apply startup configuration on all VPP DUTs | | And L2 bridge domain initialized in a 3-node circular topology @@ -163,18 +163,18 @@ | | ... | ${glob_loss_acceptance} | | ... | ${glob_loss_acceptance_type} -| Find NDR with 2 cores and rss 1 by using RFC2544 binary search and 64B frames through bridge domain in 3-node topology +| Find NDR with 2 cores and rxqueues 1 by using RFC2544 binary search and 64B frames through bridge domain in 3-node topology | | [Documentation] | | ... | Find throughput on 2 cores with non drop rate for 64B frames by using | | ... | binary search with threshold 0.1Mpps. -| | [Tags] | 2_THREAD_NOHTT_RSS_1 | MULTI_THREAD | NDR +| | [Tags] | 2_THREAD_NOHTT_RXQUEUES_1 | MULTI_THREAD | NDR | | ${framesize}= | Set Variable | 64 | | ${min_rate}= | Set Variable | 100000 | | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_64B} | | ${binary_min}= | Set Variable | ${min_rate} | | ${binary_max}= | Set Variable | ${max_rate} | | ${threshold}= | Set Variable | ${min_rate} -| | Given Add '2' worker threads and rss '1' without HTT to all DUTs +| | Given Add '2' worker threads and rxqueues '1' without HTT to all DUTs | | And Add all PCI devices to all DUTs | | And Add No Multi Seg to all DUTs | | And Apply startup configuration on all VPP DUTs @@ -184,19 +184,19 @@ | | ... | ${min_rate} | ${max_rate} | | ... | ${threshold} -| Find PDR with 2 cores and rss 1 by using RFC2544 binary search and 64B frames through bridge domain in 3-node topology +| Find PDR with 2 cores and rxqueues 1 by using RFC2544 binary search and 64B frames through bridge domain in 3-node topology | | [Documentation] | | ... | Find throughput on 2 cores with partial drop rate for 64B frames by | | ... | using binary search with threshold 0.1Mpps. Loss acceptance is set to | | ... | 0.5 percent of transmitted packets. -| | [Tags] | 2_THREAD_NOHTT_RSS_1 | MULTI_THREAD | PDR +| | [Tags] | 2_THREAD_NOHTT_RXQUEUES_1 | MULTI_THREAD | PDR | | ${framesize}= | Set Variable | 64 | | ${min_rate}= | Set Variable | 100000 | | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_64B} | | ${binary_min}= | Set Variable | ${min_rate} | | ${binary_max}= | Set Variable | ${max_rate} | | ${threshold}= | Set Variable | ${min_rate} -| | Given Add '2' worker threads and rss '1' without HTT to all DUTs +| | Given Add '2' worker threads and rxqueues '1' without HTT to all DUTs | | And Add all PCI devices to all DUTs | | And Add No Multi Seg to all DUTs | | And Apply startup configuration on all VPP DUTs @@ -208,18 +208,18 @@ | | ... | ${glob_loss_acceptance} | | ... | ${glob_loss_acceptance_type} -| Find NDR with 2 cores and rss 1 by using RFC2544 binary search and 1518B frames through bridge domain in 3-node topology +| Find NDR with 2 cores and rxqueues 1 by using RFC2544 binary search and 1518B frames through bridge domain in 3-node topology | | [Documentation] | | ... | Find throughput on 2 cores with non drop rate for 1518B frames by | | ... | using binary search with threshold 10,000pps. -| | [Tags] | 2_THREAD_NOHTT_RSS_1 | MULTI_THREAD | NDR +| | [Tags] | 2_THREAD_NOHTT_RXQUEUES_1 | MULTI_THREAD | NDR | | ${framesize}= | Set Variable | 1518 | | ${min_rate}= | Set Variable | 10000 | | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_1518B} | | ${binary_min}= | Set Variable | ${min_rate} | | ${binary_max}= | Set Variable | ${max_rate} | | ${threshold}= | Set Variable | ${min_rate} -| | Given Add '2' worker threads and rss '1' without HTT to all DUTs +| | Given Add '2' worker threads and rxqueues '1' without HTT to all DUTs | | And Add all PCI devices to all DUTs | | And Add No Multi Seg to all DUTs | | And Apply startup configuration on all VPP DUTs @@ -229,19 +229,19 @@ | | ... | ${min_rate} | ${max_rate} | | ... | ${threshold} -| Find PDR with 2 cores and rss 1 by using RFC2544 binary search and 1518B frames through bridge domain in 3-node topology +| Find PDR with 2 cores and rxqueues 1 by using RFC2544 binary search and 1518B frames through bridge domain in 3-node topology | | [Documentation] | | ... | Find throughput on 2 cores with partial drop rate for 1518B frames by | | ... | using binary search with threshold 10,000pps. Loss acceptance is set | | ... | to 0.5 percent of transmitted packets. -| | [Tags] | 2_THREAD_NOHTT_RSS_1 | MULTI_THREAD | PDR +| | [Tags] | 2_THREAD_NOHTT_RXQUEUES_1 | MULTI_THREAD | PDR | | ${framesize}= | Set Variable | 1518 | | ${min_rate}= | Set Variable | 10000 | | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_1518B} | | ${binary_min}= | Set Variable | ${min_rate} | | ${binary_max}= | Set Variable | ${max_rate} | | ${threshold}= | Set Variable | ${min_rate} -| | Given Add '2' worker threads and rss '1' without HTT to all DUTs +| | Given Add '2' worker threads and rxqueues '1' without HTT to all DUTs | | And Add all PCI devices to all DUTs | | And Add No Multi Seg to all DUTs | | And Apply startup configuration on all VPP DUTs @@ -253,18 +253,18 @@ | | ... | ${glob_loss_acceptance} | | ... | ${glob_loss_acceptance_type} -| Find NDR with 2 cores and rss 1 by using RFC2544 binary search and 9000B frames through bridge domain in 3-node topology +| Find NDR with 2 cores and rxqueues 1 by using RFC2544 binary search and 9000B frames through bridge domain in 3-node topology | | [Documentation] | | ... | Find throughput on 2 cores with non drop rate for 9000B frames by | | ... | using binary search with threshold 5,000pps. -| | [Tags] | 2_THREAD_NOHTT_RSS_1 | MULTI_THREAD | NDR +| | [Tags] | 2_THREAD_NOHTT_RXQUEUES_1 | MULTI_THREAD | NDR | | ${framesize}= | Set Variable | 9000 | | ${min_rate}= | Set Variable | 5000 | | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_9000B} | | ${binary_min}= | Set Variable | ${min_rate} | | ${binary_max}= | Set Variable | ${max_rate} | | ${threshold}= | Set Variable | ${min_rate} -| | Given Add '2' worker threads and rss '1' without HTT to all DUTs +| | Given Add '2' worker threads and rxqueues '1' without HTT to all DUTs | | And Add all PCI devices to all DUTs | | And Apply startup configuration on all VPP DUTs | | And L2 bridge domain initialized in a 3-node circular topology @@ -273,19 +273,19 @@ | | ... | ${min_rate} | ${max_rate} | | ... | ${threshold} -| Find PDR with 2 cores and rss 1 by using RFC2544 binary search and 9000B frames through bridge domain in 3-node topology +| Find PDR with 2 cores and rxqueues 1 by using RFC2544 binary search and 9000B frames through bridge domain in 3-node topology | | [Documentation] | | ... | Find throughput on 2 cores with partial drop rate for 9000B frames by | | ... | using binary search with threshold 5,000pps. Loss acceptance is set | | ... | to 0.5 percent of transmitted packets. -| | [Tags] | 2_THREAD_NOHTT_RSS_1 | MULTI_THREAD | PDR +| | [Tags] | 2_THREAD_NOHTT_RXQUEUES_1 | MULTI_THREAD | PDR | | ${framesize}= | Set Variable | 9000 | | ${min_rate}= | Set Variable | 5000 | | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_9000B} | | ${binary_min}= | Set Variable | ${min_rate} | | ${binary_max}= | Set Variable | ${max_rate} | | ${threshold}= | Set Variable | ${min_rate} -| | Given Add '2' worker threads and rss '1' without HTT to all DUTs +| | Given Add '2' worker threads and rxqueues '1' without HTT to all DUTs | | And Add all PCI devices to all DUTs | | And Apply startup configuration on all VPP DUTs | | And L2 bridge domain initialized in a 3-node circular topology @@ -296,18 +296,18 @@ | | ... | ${glob_loss_acceptance} | | ... | ${glob_loss_acceptance_type} -| Find NDR with 4 cores and rss 2 by using RFC2544 binary search and 64B frames through bridge domain in 3-node topology +| Find NDR with 4 cores and rxqueues 2 by using RFC2544 binary search and 64B frames through bridge domain in 3-node topology | | [Documentation] -| | ... | Find throughput on 4 cores and rss 2 with non drop rate for 64B +| | ... | Find throughput on 4 cores and rxqueues 2 with non drop rate for 64B | | ... | frames by using binary search with threshold 0.1Mpps. -| | [Tags] | 4_THREAD_NOHTT_RSS_2 | MULTI_THREAD | NDR +| | [Tags] | 4_THREAD_NOHTT_RXQUEUES_2 | MULTI_THREAD | NDR | | ${framesize}= | Set Variable | 64 | | ${min_rate}= | Set Variable | 100000 | | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_64B} | | ${binary_min}= | Set Variable | ${min_rate} | | ${binary_max}= | Set Variable | ${max_rate} | | ${threshold}= | Set Variable | ${min_rate} -| | Given Add '4' worker threads and rss '2' without HTT to all DUTs +| | Given Add '4' worker threads and rxqueues '2' without HTT to all DUTs | | And Add all PCI devices to all DUTs | | And Add No Multi Seg to all DUTs | | And Apply startup configuration on all VPP DUTs @@ -317,19 +317,19 @@ | | ... | ${min_rate} | ${max_rate} | | ... | ${threshold} -| Find PDR with 4 cores and rss 2 by using RFC2544 binary search and 64B frames through bridge domain in 3-node topology +| Find PDR with 4 cores and rxqueues 2 by using RFC2544 binary search and 64B frames through bridge domain in 3-node topology | | [Documentation] -| | ... | Find throughput on 4 cores and rss 2 with partial drop rate for 64B +| | ... | Find throughput on 4 cores and rxqueues 2 with partial drop rate for 64B | | ... | frames by using binary search with threshold 0.1Mpps. Loss acceptance | | ... | is set to 0.5 percent of transmitted packets. -| | [Tags] | 4_THREAD_NOHTT_RSS_2 | MULTI_THREAD | PDR +| | [Tags] | 4_THREAD_NOHTT_RXQUEUES_2 | MULTI_THREAD | PDR | | ${framesize}= | Set Variable | 64 | | ${min_rate}= | Set Variable | 100000 | | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_64B} | | ${binary_min}= | Set Variable | ${min_rate} | | ${binary_max}= | Set Variable | ${max_rate} | | ${threshold}= | Set Variable | ${min_rate} -| | Given Add '4' worker threads and rss '2' without HTT to all DUTs +| | Given Add '4' worker threads and rxqueues '2' without HTT to all DUTs | | And Add all PCI devices to all DUTs | | And Add No Multi Seg to all DUTs | | And Apply startup configuration on all VPP DUTs @@ -342,18 +342,18 @@ | | ... | ${glob_loss_acceptance_type} -| Find NDR with 4 cores and rss 2 by using RFC2544 binary search and 1518B frames through bridge domain in 3-node topology +| Find NDR with 4 cores and rxqueues 2 by using RFC2544 binary search and 1518B frames through bridge domain in 3-node topology | | [Documentation] -| | ... | Find throughput on 4 cores and rss 2 with non drop rate for 1518B +| | ... | Find throughput on 4 cores and rxqueues 2 with non drop rate for 1518B | | ... | frames by using binary search with threshold 10,000pps. -| | [Tags] | 4_THREAD_NOHTT_RSS_2 | MULTI_THREAD | NDR +| | [Tags] | 4_THREAD_NOHTT_RXQUEUES_2 | MULTI_THREAD | NDR | | ${framesize}= | Set Variable | 1518 | | ${min_rate}= | Set Variable | 10000 | | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_1518B} | | ${binary_min}= | Set Variable | ${min_rate} | | ${binary_max}= | Set Variable | ${max_rate} | | ${threshold}= | Set Variable | ${min_rate} -| | Given Add '4' worker threads and rss '2' without HTT to all DUTs +| | Given Add '4' worker threads and rxqueues '2' without HTT to all DUTs | | And Add all PCI devices to all DUTs | | And Add No Multi Seg to all DUTs | | And Apply startup configuration on all VPP DUTs @@ -363,19 +363,19 @@ | | ... | ${min_rate} | ${max_rate} | | ... | ${threshold} -| Find PDR with 4 cores and rss 2 by using RFC2544 binary search and 1518B frames through bridge domain in 3-node topology +| Find PDR with 4 cores and rxqueues 2 by using RFC2544 binary search and 1518B frames through bridge domain in 3-node topology | | [Documentation] -| | ... | Find throughput on 4 cores and rss 2 with partial drop rate for 1518B +| | ... | Find throughput on 4 cores and rxqueues 2 with partial drop rate for 1518B | | ... | frames by using binary search with threshold 10,000pps. Loss | | ... | acceptance is set to 0.5 percent of transmitted packets. -| | [Tags] | 4_THREAD_NOHTT_RSS_2 | MULTI_THREAD | PDR +| | [Tags] | 4_THREAD_NOHTT_RXQUEUES_2 | MULTI_THREAD | PDR | | ${framesize}= | Set Variable | 1518 | | ${min_rate}= | Set Variable | 10000 | | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_1518B} | | ${binary_min}= | Set Variable | ${min_rate} | | ${binary_max}= | Set Variable | ${max_rate} | | ${threshold}= | Set Variable | ${min_rate} -| | Given Add '4' worker threads and rss '2' without HTT to all DUTs +| | Given Add '4' worker threads and rxqueues '2' without HTT to all DUTs | | And Add all PCI devices to all DUTs | | And Add No Multi Seg to all DUTs | | And Apply startup configuration on all VPP DUTs @@ -387,18 +387,18 @@ | | ... | ${glob_loss_acceptance} | | ... | ${glob_loss_acceptance_type} -| Find NDR with 4 cores and rss 2 by using RFC2544 binary search and 9000B frames through bridge domain in 3-node topology +| Find NDR with 4 cores and rxqueues 2 by using RFC2544 binary search and 9000B frames through bridge domain in 3-node topology | | [Documentation] -| | ... | Find throughput on 4 cores and rss 2 with non drop rate for 9000B +| | ... | Find throughput on 4 cores and rxqueues 2 with non drop rate for 9000B | | ... | frames by using binary search with threshold 5,000pps. -| | [Tags] | 4_THREAD_NOHTT_RSS_2 | MULTI_THREAD | NDR +| | [Tags] | 4_THREAD_NOHTT_RXQUEUES_2 | MULTI_THREAD | NDR | | ${framesize}= | Set Variable | 9000 | | ${min_rate}= | Set Variable | 5000 | | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_9000B} | | ${binary_min}= | Set Variable | ${min_rate} | | ${binary_max}= | Set Variable | ${max_rate} | | ${threshold}= | Set Variable | ${min_rate} -| | Given Add '4' worker threads and rss '2' without HTT to all DUTs +| | Given Add '4' worker threads and rxqueues '2' without HTT to all DUTs | | And Add all PCI devices to all DUTs | | And Apply startup configuration on all VPP DUTs | | And L2 bridge domain initialized in a 3-node circular topology @@ -407,19 +407,19 @@ | | ... | ${min_rate} | ${max_rate} | | ... | ${threshold} -| Find PDR with 4 cores and rss 2 by using RFC2544 binary search and 9000B frames through bridge domain in 3-node topology +| Find PDR with 4 cores and rxqueues 2 by using RFC2544 binary search and 9000B frames through bridge domain in 3-node topology | | [Documentation] -| | ... | Find throughput on 4 cores and rss 2 with partial drop rate for 9000B +| | ... | Find throughput on 4 cores and rxqueues 2 with partial drop rate for 9000B | | ... | frames by using binary search with threshold 5,000pps. Loss | | ... | acceptance is set to 0.5 percent of transmitted packets. -| | [Tags] | 4_THREAD_NOHTT_RSS_2 | MULTI_THREAD | PDR +| | [Tags] | 4_THREAD_NOHTT_RXQUEUES_2 | MULTI_THREAD | PDR | | ${framesize}= | Set Variable | 9000 | | ${min_rate}= | Set Variable | 5000 | | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_9000B} | | ${binary_min}= | Set Variable | ${min_rate} | | ${binary_max}= | Set Variable | ${max_rate} | | ${threshold}= | Set Variable | ${min_rate} -| | Given Add '4' worker threads and rss '2' without HTT to all DUTs +| | Given Add '4' worker threads and rxqueues '2' without HTT to all DUTs | | And Add all PCI devices to all DUTs | | And Apply startup configuration on all VPP DUTs | | And L2 bridge domain initialized in a 3-node circular topology