Re: [PATCHv3] opensm: Better handling of non responsive SMAs

[Sasha Khapyorsky <sashak-smomgflXvOZWk0Htik3J/w@public.gmane.org>]

On 14:29 Wed 09 Jun     , Hal Rosenstock wrote:
> 
> In order to better handle non responsive SMAs (when link is physically up
> but the SMA does not respond), a timeout based mechanism for SMPs is added
> to better enable forward progress in a more timely fashion. So rather than
> waiting for timeouts and outstanding wire SMPs to drop below some configured
> value, there is also an additional limit introduced for transaction based SMPs.
> These timeout based SMPs are capped at a configured maximum value.
> 
> Two new options are added for this:
> max_wire_smps2 indicates the second (higher) limit of timeout based
> SMPs supported. When this limit is reached, timeout based SMPs
> are not longer sent (until the number of outstanding ones drops below
> this limit).
> max_smps_timeout indicates the number of microseconds used for the
> timeout in between sending SMPs when the oustanding wire count is above
> max_wire_smps and below max_wire_smps2. It defaults to the transaction
> timeout times the transaction retries.
> 
> The timeout based SMP mechanism can be disabled by setting max_wire_smps2 
> to the same value as max_wire_smps. This is equivalent to the (current)
> algorithm prior to this change. By default, this mechanism is disabled.
> 
> Signed-off-by: Hal Rosenstock <hal.rosenstock-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>

Applied. Thanks.

Sasha
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