[Users] opensm params

[Hal Rosenstock]

There are 2 parameters:

# The maximal time a packet can wait at the head of
# transmission queue.
# The actual time is 4.096usec * 2^<head_of_queue_lifetime>
# The value 0x14 disables this mechanism
head_of_queue_lifetime 0x12

# The maximal time a packet can wait at the head of queue on
# switch port connected to a CA or router port
leaf_head_of_queue_lifetime 0x10

head_of_queue_lifetime is used on switch ports whose peer is a switch port.
leaf_head_of_queue_lifetime is used on switch ports whose peer is not a
switch port.

The other related parameter is the switch LifeTimeValue which is:
# The code of maximal time a packet can live in a switch
# The actual time is 4.096usec * 2^<packet_life_time>
# The value 0x14 disables this mechanism
packet_life_time 0x12


These parameters affect packet discarding and can affect performance.

-- Hal








On Fri, Sep 15, 2017 at 12:55 PM, Black.S <Black.S52 at yandex.ru> wrote:

> Oh sorry
> I am very newbie in maillist
> I want to write to
>  http://lists.openfabrics.org/pipermail/users/2017-June/thread.html
>
> My question is
>
>
> Does performance affect the opensm.conf parameter "HOQ *Lifetime* Limit "
> ?
>
> in which case this parameter be changed?
>
>
> 15.09.2017 19:39, Hal Rosenstock пишет:
>
> I don't understand the question. What OpenSM parameters are you asking
> about ?
>
> -- Hal
>
> On Fri, Sep 15, 2017 at 11:58 AM, Black.S <Black.S52 at yandex.ru> wrote:
>
>> Hi all
>>
>> Sorry for the late question
>>
>> Does performance affect the lifetime of the package ?
>>
>> Under what circumstances should this parameter be changed?
>>
>>
>>
>> _______________________________________________
>> Users mailing list
>> Users at lists.openfabrics.org
>> http://lists.openfabrics.org/mailman/listinfo/users
>>
>>
>
>
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