fi_sockets man page on Kali

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fi_sockets(7)			   @VERSION@			 fi_sockets(7)

NAME
       fi_sockets - The Sockets Fabric Provider

OVERVIEW
       The  sockets provider is a general purpose provider that can be used on
       any system that supports TCP sockets.  The provider is not intended  to
       provide	performance  improvements over regular TCP sockets, but rather
       to allow developers to write, test, and debug application code even  on
       platforms that do not have high-performance fabric hardware.  The sock‐
       ets provider supports all libfabric provider  requirements  and	inter‐
       faces.

SUPPORTED FEATURES
       The  sockets provider supports all the features defined for the libfab‐
       ric API.	 Key features include:

       Endpoint types : The provider supports all endpoint  types:  FI_EP_MSG,
       FI_EP_RDM, and FI_EP_DGRAM.

       Endpoint	 capabilities  : The following data transfer interface is sup‐
       ported for a all endpoint types: fi_msg.	  Additionally,	 these	inter‐
       faces  are  supported for reliable endpoints (FI_EP_MSG and FI_EP_RDM):
       fi_tagged, fi_atomic, and fi_rma.

       Modes : The sockets provider supports all operational  modes  including
       FI_CONTEXT and FI_MSG_PREFIX.

       Progress	  :   Sockets  provider	 supports  both	 FI_PROGRESS_AUTO  and
       FI_PROGRESS_MANUAL, with a default set to auto.	When progress  is  set
       to  auto,  a background thread runs to ensure that progress is made for
       asynchronous requests.

LIMITATIONS
       Sockets provider attempts to emulate the entire API set, including  all
       defined	options.   In  order to support development on a wide range of
       systems, it is implemented over TCP sockets.  As a result, the  perfor‐
       mance  numbers  are  lower compared to other providers implemented over
       high-speed fabric, and lower than what an application might see	imple‐
       menting to sockets directly.

       Does not support FI_ADDR_STR address format.

RUNTIME PARAMETERS
       The sockets provider checks for the following environment variables -

       FI_SOCKETS_PE_WAITTIME  : An integer value that specifies how many mil‐
       liseconds to spin while waiting for progress in FI_PROGRESS_AUTO mode.

       FI_SOCKETS_MAX_CONN_RETRY : An integer value that specifies the	number
       of socket connection retries before reporting as failure.

       FI_SOCKETS_DEF_CONN_MAP_SZ  : An integer to specify the default connec‐
       tion map size.

       FI_SOCKETS_DEF_AV_SZ : An integer to specify the default address vector
       size.

       FI_SOCKETS_DEF_CQ_SZ  :	An  integer  to specify the default completion
       queue size.

       FI_SOCKETS_DEF_EQ_SZ : An integer to specify the	 default  event	 queue
       size.

       FI_SOCKETS_DGRAM_DROP_RATE  : An integer value to specify the drop rate
       of dgram frame when endpoint is FI_EP_DGRAM.   This  is	for  debugging
       purpose only.

       FI_SOCKETS_PE_AFFINITY  : If specified, progress thread is bound to the
       indicated range(s) of Linux virtual processor ID(s).   This  option  is
       currently    not	   supported	on    OS    X.	  The	usage	is   -
       id_start[-id_end[:stride]][,].

LARGE SCALE JOBS
       For large scale runs one can use these environment variables to set the
       default	parameters  e.g.   size	 of the address vector(AV), completion
       queue (CQ), connection map etc.	that satisfies the requriment  of  the
       particular  benchmark.  The recommended parameters for large scale runs
       are  FI_SOCKETS_MAX_CONN_RETRY,	FI_SOCKETS_DEF_CONN_MAP_SZ,   FI_SOCK‐
       ETS_DEF_AV_SZ, FI_SOCKETS_DEF_CQ_SZ, FI_SOCKETS_DEF_EQ_SZ.

SEE ALSO
       fabric(7), fi_provider(7), fi_getinfo(3)

AUTHORS
       OpenFabrics.

Libfabric Programmer's Manual	  2017-08-09			 fi_sockets(7)
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