[libfabric-users] address size

[Zhang, Wei]

You are right, the addrlen was returned by the fi_getname’s addrlen field.

Note that according to libfabric document, this field is always set, even when the buffer you provided is too small to hold the actual name.


From: Libfabric-users <libfabric-users-bounces at lists.openfabrics.org> on behalf of "Biddiscombe, John A." <john.biddiscombe at cscs.ch>
Date: Friday, March 3, 2023 at 3:04 AM
To: "libfabric-users at lists.openfabrics.org" <libfabric-users at lists.openfabrics.org>
Subject: RE: [EXTERNAL][libfabric-users] address size


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Apologies. more googling shows it is returned by fi_getname in the addrlen field.



JB

________________________________
From: Biddiscombe, John A.
Sent: 03 March 2023 11:59
To: libfabric-users at lists.openfabrics.org
Subject: address size


when using native address formats, I have the following hardcoded into my stuff


#ifdef HAVE_LIBFABRIC_GNI
#define HAVE_LIBFABRIC_LOCALITY_SIZE 48
#endif

#ifdef HAVE_LIBFABRIC_CXI
#define HAVE_LIBFABRIC_LOCALITY_SIZE 4
#endif

#if defined(HAVE_LIBFABRIC_VERBS) || defined(HAVE_LIBFABRIC_TCP) ||                                \
    defined(HAVE_LIBFABRIC_SOCKETS) || defined(HAVE_LIBFABRIC_PSM2)
#define HAVE_LIBFABRIC_LOCALITY_SIZE 16
#define HAVE_LIBFABRIC_LOCALITY_SOCKADDR
#endif

I want to use amazon EFA, and have no idea how large an address struct is with FI_ADDR_EFA

What is the correct way to find this info so that addresses can be safely copied around when compiling against different providers?



Thanks



JB




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