> On 9/05/10 11:28 PM, "tanlin" <tan...@seg.nju.edu.cn> wrote:
>
>>
>> Hi,kusy
>> I'm a graduate student of the department of computer science of
>> Nanjing Univercity in China.
>> Recently, I was reading your paper "The Flooding Time Synchronization
>> Protocol" and have studied the
>> implementation code of FTSP , and questions arised about the following
>> code:
>> void task processMsg()
>> {
>> TimeSyncMsg* msg = (TimeSyncMsg*)(call Send.getPayload(processedMsg,
>> sizeof(TimeSyncMsg)));
>> if( msg->rootID < outgoingMsg->rootID &&
>> // jw: after becoming the root ignore other roots messages (in
>> send period)
>> !(heartBeats < IGNORE_ROOT_MSG && outgoingMsg->rootID ==
>> TOS_NODE_ID) )
>>
>> I was wondering What you use the judge !(heartbeats < IGNORE_ROOT_MSG) for
>> ?What's its functionality here?
>> I think it is used to ignore the messages contained the failed root.
>> Detail
>> about such a situation may be like this:
>> the root failed, but the other nodes still transmit the synchronization
>> message which used the failed root as the
>> message's root. This may cause that the remain nodes would synchronize to a
>> failed root. Did I catch the point?
>> or there is some other consideration ? can you give me more informaiton
>> about it ？
yes, your observation is correct. i've updated the confusing comment in the
code.
thanks!
brano
>> Your kind help will be appreciated, Looking forward.
>> Best Regards!
>>
>> Tanlin
>> 2010-05-06
>>
>>
>>
>> tanlin
>
>
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