Re: sl6 infiniband mtu problem

2012-09-27 Thread Stijn De Weirdt 

hi sven,


i try at the moment to figure out why our QDR Infiniband is not
as fast as it should be. So I realized that we use 2k mtu size, and
tried to change this to 4k. But don't now how.

how fast are you expecting to get? (and what are you measuring)


enviroment:
mellanox connectX-3 cards in interlagos machine with sl6.3 64 bit
(RHEL/SL Ofed stack)
interlagos as in AMD RD890 IO bridge that only has max pcie payload of 
128byte and thus can only reach 75% of a pcie-2 link (which will result 
in approx 75% of the QDR link)
(google pcie payload plxtech, theres a pdf soemwhere with a self 
explaining plot)


very nice of amd not to have pcie-3 chips ...


stijn

mellanox sx6036 switch (4k mtu enabled)

in the mellanox docu i found something about a module parameter
set_4k_mtu but this don't work with SL6.3 (unknown parameter)

this also don't work, because there is no mlx4_port1_mtu
echo 4096  /sys/class/infiniband/mlx4_0/device/mlx4_port1_mtu

is it possible that the sl mellanox module don't support 4k mtu?

best regards

sven

RedHat Developer Toolset : equivalent for SL 5 or 6?

2012-09-27 Thread Jeff McWilliams 
The Red Hat Developer Toolset seems to be a more updated version of
the gcc compiler, debugger, and binutils, including gcc/g++ 4.7

It appears to be available for both RHEL 5 and RHEL 6 users.

Is there an equivalent set of packages available for SL 5 or SL 6?

Thanks,

Jeff

Re: RedHat Developer Toolset : equivalent for SL 5 or 6?

2012-09-27 Thread Connie Sieh 

On Thu, 27 Sep 2012, Jeff McWilliams wrote:


The Red Hat Developer Toolset seems to be a more updated version of
the gcc compiler, debugger, and binutils, including gcc/g++ 4.7

It appears to be available for both RHEL 5 and RHEL 6 users.

Is there an equivalent set of packages available for SL 5 or SL 6?


I am working on building them for SL 5 and SL 6.

-Connie Sieh


Thanks,

Jeff