OpenFabrics Developers Summit SC06 QoS Update and Implementation RFC Eitan Zahavi, Mellanox Technologies Nov 2006.

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Presentation transcript:

OpenFabrics Developers Summit SC06 QoS Update and Implementation RFC Eitan Zahavi, Mellanox Technologies Nov 2006

IBTA QoS Annex Update 2/7/06 Mellanox Technologies – Developers SC06 Page 2 Client CMA/ CM SM/SA QM Draft annex is in LWG final review ETA IBTA release Q QoS enforcement by Client to QM negotiation The main mechanism is for QM to hide behind SA PathRecord PathRecord

IBTA QoS Annex Details QoS PathRecord/MultiPathRecord: –Additional query fields [Type, TClass]: requested priority (if the client knows) –Type == 0 means TClass is DSCP ServiceID (same as the one used in CM REQ) –Additional response fields Response status: granted or failed due to policy 2/7/06 Mellanox Technologies – Developers SC06 Page 3

IPoIB QoS Support Available today (OFED 1.1) Specified by IETF IPoIB RFC: 4391/4392 QoS is assigned by SM per IPoIB subnet –IPoIB Subnet = P_Key IPoIB uses broadcast group parameters for UDAV –SL, MTU, RATE, TClass 2/7/06 Mellanox Technologies – Developers SC06 Page 4

CMA Enhancements Query SA for QoS capability –SA ClassPortInfo.CapabilityMask.IsQoSSupported Fill in QoS fields in PathRecord –ServiceID – available today Given as rdma_resolve_addr args: dst_addr.sin_port, id.ps –TClass – if optionally provided As (sockaddr_in6*)&dst_addr->tclass Handle error code in case path is not granted 2/7/06 Mellanox Technologies – Developers SC06 Page 5

ULP Enhancements ULPs using CMA already handled –SDP, iSER, RDS ULPs owning their CM sequence –SRP, MPI, … –Fill in the ULP specific ServiceID –Fill in DSCP if specific one is defined in TClass Configuration is ULP specific 2/7/06 Mellanox Technologies – Developers SC06 Page 6

OpenSM Enhancements Implement integrated “Passive QM” Support QoS Policy –Node groups –Fabric setup rules –Matching rule setup Perform Fabric Setup –Validate requested policy is realizable –Optimize setup runtime Match incoming PathRecord/MultiPathRecord –Match against predefined QoS levels –Provide back QoS level: SL, LID, MTU, RATE 2/7/06 Mellanox Technologies – Developers SC06 Page 7