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2009-08-05T21:50:06Z

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These are packages that allow ''user space'' communication between nodes
over Ethernet. Note: all high performance interconnects provide similar libraries (uDAPL for InfiniBand and MX for Myrinet). Almost all recent MPI's will link to uDAPL or MX libraries.

* [http://www.disi.unige.it/project/gamma/ Genoa Active Message MAchine] or GAMMA is famous for achieving less than 10 μsecond latencies over GigE. It does require a patch to the Ethernet driver and only supports certain Intel Ethernet chip-sets. Results have been impressive.

* [http://software.intel.com/en-us/articles/intel-direct-ethernet-transport Intel® Direct Ethernet Transport] (DET) which works by providing uDAPL like InfiniBand interface over GigE. uDAPL is the User Direct Access Programming Library that defines a single set of user APIs for all RDMA-capable transports. DET includes a kernel module and a uDAPL library for Ethernet and will work on almost any Ethernet NIC. It can linked with any software requiring uDAPL library.

* [http://open-mx.gforge.inria.fr/ Open-MX] is based on the Myrinet MX protocol. Essentially, any software that links to the Myricom MX library should be able to link with Open-MX. Currently, Open MPI, MPICH2, and the PVFS2 file system have all been shown to work with Open-MX. While Open-MX will work with almost all GigE and 10-GigE chip-sets without modifying drivers, it does require kernel 2.6.15 or higher to work. Depending on the chip-set Open-MX latencies as low as 10 μseconds for GigE have been reported.

User Space Libraries - Revision history

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