Sorry for bumping old thread, i'm solve my problems with new firmware.
I have supermicro servers that rebrand mellanox firmware (recompile
and change some bits)
Now all works fine i have 40 gb/s QDR instead of 10 Gb/s
2013/4/9 Sebastian Riemer <sebastian.rie...@profitbricks.com>:
> On 09.04.2013 16:23, Hal Rosenstock wrote:
>>> So these values are exactly the same as in "ibv_devinfo" and can be set
>>> in /sys/class/infiniband/mlx4_0/device/mlx4_port1_mtu.
>>>
>>> I've found the PortInfo with the command
>>> "smpquery portinfo -C mlx4_0 3 1"
>>> where I'm using the first HCA to contact the SM. I tell the SM the
>>> destination LID ('3' here in my case) and the destination port ('1').
>>>
>>> Is there another method to set the max MTU?
>>
>> That doesn't set max MTU (MTUCap) but merely reads it (for that port).
>
> Sorry, copy and paste error. I've meant the mlx4 file:
> /sys/class/infiniband/mlx4_0/device/mlx4_port1_mtu
>
> But you've answered that by "vendor specific". Thanks for the valuable
> information!
>
> For us most interesting would be if the MTU can be changed live without
> any service disruption. Looks like the mlx4 driver can't provide that.
> Perhaps switches can do that.
>
> Cheers,
> Sebastian
>
--
Vasiliy Tolstov,
e-mail: v.tols...@selfip.ru
jabber: v...@selfip.ru
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