User Manual

Rev 2.2-1.0.1
Mellanox Technologies
155
• GasNet library contains MXM conduit which offloads from UPC all P2P operations as
well as some synchronization routines. For further information on MXM, please refer to
the Mellanox website.
Mellanox OFED 1.8 includes ScalableUPC 2.1, which is installed under:
/opt/mellanox/bupc.
If you have installed OFED 1.8, you do not need to download and install ScalableUPC.
Mellanox ScalableUPC is distributed as source RPM as well and can be downloaded from the
Mellanox website.
5.6.1 Installing ScalableUPC
Mellanox ScalableUPC is installed as part of MLNX_OFED package.
Mellanox OFED 1.8.5 includes ScalableUPC Rev 2.2, which is installed under:
/opt/mellanox/bupc.
If you have installed OFED 1.8.5, you do not need to download and install ScalableUPC.
Mellanox ScalableUPC is distributed as source RPM as well and can be downloaded from the
Mellanox website.
Please note, the binary distribution of ScalableUPC is compiled with the following defaults:
• FCA support. FCA is disabled at runtime by default and must be configured prior to
using it from the ScalableUPC. For further information, please refer to FCA User Man-
ual.
• MXM support enabled by default
5.6.2 FCA Runtime Parameters
The following parameters can be passed to “upcrun” in order to change FCA support behavior:
Table 18 - Runtime Parameters
Parameter Description
-fca_enable <0|1>
Disables/Enables FCA support at runtime (default: disable).
-fca_np <value>
Enables FCA support for collective operations if the number
of processes in the job is greater than the
fca_np value
(default: 64).
-fca_verbose <level>
Sets verbosity level for the FCA modules