[ofa-general] Default value of LocalAckTimeout for a new QP

Amir Vadai amirv at mellanox.co.il
Thu May 21 13:04:32 PDT 2009


Thanks,
 
Will try it.
 
- Amir

________________________________

From: Hal Rosenstock [mailto:hal.rosenstock at gmail.com]
Sent: Thu 21-May-09 11:01 PM
To: Amir Vadai
Cc: Sean Hefty; Nimrod Gindi; OpenIB
Subject: Re: [ofa-general] Default value of LocalAckTimeout for a new QP



On Thu, May 21, 2009 at 3:54 PM, Amir Vadai <amirv at mellanox.co.il> wrote:
> Hal Hi,
>
> Assuming I  am using OpenSM - how can I tell  it to do  it?

Assuming this is a non QoS configuration, you need to configure the
subnet_timeout.

-- Hal

>
> Thanks,
> Amir
> ________________________________
> From: Hal Rosenstock [mailto:hal.rosenstock at gmail.com]
> Sent: Thu 21-May-09 4:20 PM
> To: Amir Vadai
> Cc: Sean Hefty; Nimrod Gindi; OpenIB
> Subject: Re: [ofa-general] Default value of LocalAckTimeout for a new QP
>
> On Thu, May 21, 2009 at 7:58 AM, Amir Vadai <amirv at mellanox.co.il> wrote:
>> Sean Hi,
>>
>> I need to know how is the LocalAckTimeout for a new QP is calculated (for
>> an
>> SDP QP).
>
> It's a function of the packet life time on the path from source to
> destination and the local CA ack delay.
>
>> Is there a way to change it through a module parameter?
>> If not, what is the right way to change it?
>
> It depends on the SM being used. OpenSM has a way to change the path
> PLT returned/used.
>
> -- Hal
>
>> Thanks,
>> Amir
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>


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