about cxgb3 and cxgb4

about cxgb3 and cxgb4

[Andrea Gozzelino]

Hi all,

I ask you an opinion about RDMA driver cxgb3 and cxb4.

I installed two NetEffect Intel cards on machines with OS Linux and
driver cxgb3. Please see the detail below:

[root@redigo-01 ~]# find / -name cxgb3
/sys/module/cxgb3
/sys/bus/pci/drivers/cxgb3
/usr/src/kernels/2.6.18-164.15.1.el5-x86_64/drivers/net/cxgb3
/usr/src/kernels/2.6.18-164.15.1.el5-x86_64/drivers/infiniband/hw/cxgb3
/usr/src/kernels/2.6.18-164.15.1.el5-x86_64/include/config/scsi/cxgb3
/usr/src/kernels/2.6.18-164.2.1.el5-x86_64/drivers/net/cxgb3
/usr/src/kernels/2.6.18-164.2.1.el5-x86_64/drivers/infiniband/hw/cxgb3
/usr/src/kernels/2.6.18-164.2.1.el5-x86_64/include/config/scsi/cxgb3
/usr/src/ofa_kernel-1.5.2/drivers/net/cxgb3
/usr/src/ofa_kernel-1.5.2/drivers/infiniband/hw/cxgb3
/lib/modules/2.6.18-164.2.1.el5/updates/kernel/drivers/net/cxgb3

/lib/modules/2.6.18-164.2.1.el5/updates/kernel/drivers/infiniband/hw/cxgb3
/lib/modules/2.6.18-164.2.1.el5/kernel/drivers/net/cxgb3
/lib/modules/2.6.18-164.2.1.el5/kernel/drivers/infiniband/hw/cxgb3
/lib/modules/2.6.18-164.15.1.el5/kernel/drivers/net/cxgb3
/lib/modules/2.6.18-164.15.1.el5/kernel/drivers/infiniband/hw/cxgb3
[root@redigo-01 ~]# find / -name cxgb4
[root@redigo-01 ~]# 

I read a lot of emails about cxgb4, but I have not installed.
Could cxgb4 give an improvement on transfer speed or latency? I think
the answer is negative, but ...
What is the gain for RDMA over Ethernet at 10 Gbit/s performance - if
there is - to install cxgb4 instead of cxgb3?

Ideas or suggestions are welcome.

Thank you very much,
Andrea Gozzelino

INFN - Laboratori Nazionali di Legnaro	(LNL)
Viale dell'Universita' 2 -I-35020 - Legnaro (PD)- ITALIA
Office: E-101
Tel: +39 049 8068346
Fax: +39 049 641925
Mail: andrea.gozzelino-PK20h7lG/Rc1GQ1Ptb7lUw@public.gmane.org
Cell: +39 3488245552				

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Re: about cxgb3 and cxgb4

[Steve Wise]

Andrea Gozzelino wrote:
> Hi all,
>
> I ask you an opinion about RDMA driver cxgb3 and cxb4.
>
> I installed two NetEffect Intel cards on machines with OS Linux and
> driver cxgb3. Please see the detail below:
>
>   

cxgb3/4 is for the Chelsio T3/T4 hardware, not the NetEffect/Intel hardware.

You want iw_nes.ko.

Steve,

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