Chelsio Communications Chelsio T5 Guia do Utilizador descarregar pdf (Página 86)

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Chapter V. WD-UDP

Chelsio T5/T4 Unified Wire For Linux Page 86

egress, if the destination IP address will not route out via the T5/T4 device, then it too will

not be accelerated.

4.1.2. Using libcxgb4_sock

The libcxgb4_sock library utilizes the Linux RDMA Verbs subsystem, and thus requires the

RDMA modules be loaded. Ensure that your systems load the iw_cxgb4 and rdma_ucm

modules:

[root@host]# modprobe iw_cxgb4

[root@host]# modprobe rdma_ucm

Now, preload libcxgb4_sock, using one of the methods mentioned below when starting your

application:

 Preloading using wdload script:

[root@host]# PROT=UDP wdload <pathto>/your_application

The above command will generate an end point file, libcxgb4_sock.conf at /etc/. Parameters

like interface name and port number can be changed in this file.

 Preloading manually

Create a configuration file that defines which UDP endpoints should be accelerated, their vlan

and priority if any, as well as which T5/T4 interface/port should be used. The file

/etc/libcxgb4_sock.conf contains these endpoint entries. Create this file on all systems

using libcxgb4_sock. Here is the syntax:

# Syntax:

# endpoint {attributes} ...

# where attributes include:

# interface = interface-name

# port = udp-port-number

# vlan = vlan-id

# priority = vlan-priority

If you encounter error while using wdload on kernels built on RHEL 5.x

distribution, then run the above command as :

[root@host]# NUMA=0 PROT=UDP wdload <pathto>/your_application

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