Re: [Gems-users] system/Sequencer.C:134: Possible Deadlock detected

[Polina Dudnik <pdudnik@xxxxxxxxx>]

What protocol are you using? Did you change it?

2009/10/20 Jianchen Hu <hujc.thu@xxxxxxxxx>

I do not know what the problem is, but just a guess.
The garnet network has a default Macro called INFINITE_ which value is 10000. This value is used to initialize all the virtual channels and maybe some other components. If you run 1 billion cycle, and if some virtual channels are never used( the enqueue time is set to INFINITE_) , a deadlock might occur.

2009/10/20 dongjianbo <dongjianbo@xxxxxxxxx>

Hi Joshi,

 

According to the following code:

if (current_time - request.getTime() >= g_DEADLOCK_THRESHOLD) {
        WARN_MSG("Possible Deadlock detected");

        ...

 

In the file Sequencer.C, when a sequencer is waken, it will check for deadlock.

After a long time, i.e. g_DEADLOCK_THRESHOLD, if the message is still not sent, the warning will occur.

 

Hope it helps.

 

 

 

2009-10-21

---

Jianbo Dong

---

发件人： Joshi,Madhura R

发送时间： 2009-10-21  06:41:59

收件人： gems-users@xxxxxxxxxxx

抄送：

主题： [Gems-users] system/Sequencer.C:134: Possible Deadlock detected

Hello all,

 

Thanks for all previous replies regarding garnet network.

I am trying to run simulations for more than 1 billion cycles. I 

get the following output

system/Sequencer.C:134: Possible Deadlock detected

node_id 7

 

Can anyone please tell when this message appears or when this 

condition can occur? For the node id appearing in this message, I 

am not able to receive packets after certain limit.

But for rest of the processors in network, things work fine

 

Sincerely,

Madhura Joshi

 

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