[codes-ross-users] Simulation ends with events unprocessed

[Jian Peng]

Hi,

    After some debugging, I found the reason of this issue was
"tw_event_send()". I added some debugging code shown as
"tw_event_send.png". Then I got debugging output as "debug1.png". Please
notice the highlighted value of pointer "kp". Then I found this same "kp"
value in previous context, shown in "debug2.png". Since the "last_time" is
greater than "recv_ts", "tw_eventq_push()" rather than "tw_pq_enqueue()" is
called. As I'm doing sequential simulation, "tw_scheduler_sequential()" in
tw-shed.c should be used. "tw_pq_dequeue()" is used to read the event
queue, shown in "tw_scheduler_sequential.png".

    So here's the question. The events that called "tw_eventq_push()" seem
not able to be retrieved by "tw_pq_dequeue()". So I'm wondering that either
mapping multiple LPs to one KP or only using "tw_pq_dequeue()" in
sequential scheduler is a bug? I haven't looked too much into both parts,
just got this question in mind.

    Thanks!



On Mon, Feb 27, 2017 at 1:20 PM, Jian Peng <jpeng10 at hawk.iit.edu> wrote:

> Hi,
>
>     I'm running some experiments on Dragonfly with CODES 5.0.2.  Sometimes
> they end up with unsent messages remaining in terminals and routers. I
> think the reason is the events that carry these messages are not handled. I
> looked through my debugging information and confirmed it.
>
>     So, why does ROSS end when there are still events unprocessed? I'm
> running a sequential simulation. Thanks.
>
> [image: Inline image 1]
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/codes-ross-users/attachments/20170228/ffa0ea33/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 62165 bytes
Desc: not available
URL: <http://lists.mcs.anl.gov/pipermail/codes-ross-users/attachments/20170228/ffa0ea33/attachment-0005.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: debug2.png
Type: image/png
Size: 99496 bytes
Desc: not available
URL: <http://lists.mcs.anl.gov/pipermail/codes-ross-users/attachments/20170228/ffa0ea33/attachment-0006.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: debug3.png
Type: image/png
Size: 34102 bytes
Desc: not available
URL: <http://lists.mcs.anl.gov/pipermail/codes-ross-users/attachments/20170228/ffa0ea33/attachment-0007.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: tw_scheduler_sequential.png
Type: image/png
Size: 106007 bytes
Desc: not available
URL: <http://lists.mcs.anl.gov/pipermail/codes-ross-users/attachments/20170228/ffa0ea33/attachment-0008.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: tw_event_send.png
Type: image/png
Size: 190823 bytes
Desc: not available
URL: <http://lists.mcs.anl.gov/pipermail/codes-ross-users/attachments/20170228/ffa0ea33/attachment-0009.png>