Re: [PATCH 3/3] sctp: add heartbeat expired counter to /proc/net/sctp/snmp

[Shan Wei <shanwei@cn.fujitsu.com>]

Vlad Yasevich wrote, at 07/02/2010 10:38 PM:
> 
> Shan Wei wrote:
>> Just like T4-RTO, T3-RXT timeout events, add HEARTBEAT timeout
>> counter for debug. It is useful because all these timeout events
>> cause association error counter to increase.
>>
> 
> Unlinke T4-RTO and T3-RTO, heartbeat timeouts happen all the time
> and do not necessarily mean that a something is wrong.

They are different. I ignore this. 
 
> It may be worth tracking the number of non-responded heartbeats, since those
> will actually cause association destruction.

If a heartbeat chunk is not responded, the global
error counter value is increased. If this error value exceeds association_max_retrans,
abort the association. But the error counter is also added by T3-RTO, T4-RTO event.

Although we know the number of non-responded heartbeats, we also don't know
the closer of association destruction.

-- 
Best Regards
-----
Shan Wei