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IB Verbs Compatibility
Presentation on theme: "IB Verbs Compatibility"— Presentation transcript:
IB Verbs Compatibility
(Scalable) Fabric Interfaces
is implied by incorporating interface sets under a single framework
?Objects exist that are usable between the interfacesIsolated interfaces turn the framework into a complex dlopenInterfaces are composableMay be used together
Verbs API and data structures supportable through a compatibility mode
Verbs objects may be converted to FI objects
ibv_qp fid_ep, ibv_cq fid_ec
FI objects do not necessarily convert to verbsProvide access to native FI objectsExpose fields through
ibverbs data structuresAllows use of FI APIsApplications migrate to FI to use new features
from Verbs to FI
ibverbs abstraction layer
from Verbs to
Expose ‘verbs’ interfaces directly from FIUse macros or static inline functions to convert ‘libibverbs’ exported calls to FI callsSame performance as using libibverbs directlyRedefine verb data structuresExpose native FI definitions
Includes prototypes for libibverbs APIsibv_get_device_list() – inline callFirst call made by any appMaps to fi_open(“ibv_devices” …)Redefine struct
ibv_* for use with libfabricibv_device
, ibv_context, ibv_pd, ibv_mr
, ibv_srq, ibv_qp, ibv_cq,ibv_ah, ibv_comp_channelHide internal fields, reference FI objects
RDMA CM handled in a similar fashion
More challenging, not a single top-level entry point
Need to determine how to handle header filesAvoid conflicting with libibverbs and librdmacm headersCould require source change to use new headerwww.openfabrics.org