1fi_tcp(7)                      Libfabric v1.10.0                     fi_tcp(7)
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NAME

6       fi_tcp - The msg sockets Fabric Provider
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OVERVIEW

9       The  tcp  provider can be used on any system that supports TCP sockets.
10       The provider is not intended to provide performance  improvements  over
11       regular  TCP sockets, but rather to allow developers to write, test,and
12       debug application code even on platforms that do not have  high-perfor‐
13       mance fabric hardware.
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SUPPORTED FEATURES

16       The following features are supported
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18       Endpoint types
19              FI_EP_MSG  is  the only supported endpoint type.  Reliable data‐
20              gram endpoint over TCP sockets can be achieved by  layering  RxM
21              over tcp provider.
22       FI_EP_RDM  is  supported by layering ofi_rxm provider on top of the tcp
23       provider.
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25       Endpoint capabilities
26              The tcp provider currently supports FI_MSG, FI_RMA
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28       Progress
29              Currently tcp provider supports only FI_PROGRESS_MANUAL
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31       Shared Rx Context
32              The tcp provider supports shared receive context
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34       Multi recv buffers
35              The tcp provider supports multi recv buffers
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RUNTIME PARAMETERS

38       The tcp provider check for the following enviroment variables -
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40       FI_TCP_IFACE
41              A specific can be requested with this variable
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43       FI_TCP_PORT_LOW_RANGE/FI_TCP_PORT_HIGH_RANGE
44              These variables are used to set the range of ports to be used by
45              the  tcp  provider  for  its passive endpoint creation.  This is
46              useful where only a range of ports are allowed by  firewall  for
47              tcp connections.
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LIMITATIONS

50       The  tcp  provider is implemented over TCP sockets to emulate libfabric
51       API.  Hence the performance may be lower than what an application might
52       see  implementing  to  sockets directly, depending on the types of data
53       transfers the application is trying to achieve.
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SEE ALSO

56       fabric(7), fi_provider(7), fi_getinfo(3)
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AUTHORS

59       OpenFabrics.
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63Libfabric Programmer's Manual     2020-04-14                         fi_tcp(7)