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Re: [ptp-dev] PTP enhancements to support LoadLeveler
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On Jul 18, 2007, at 12:54 PM, Dave Wootton wrote:
We have some success now with seeing job and node status from
LoadLeveler
in the PTP views. There are some enhancements we think would be
useful to
LoadLeveler and other resource managers as well as some questions
Suggestions
1) LoadLeveler has a number of statuses for a job and node beyond the
simple running and exited that I am using for PE. We originally talked
about adding additional icons or different colored icons to represent
those statuses, but we think there are too many for this to be a good
idea. We're thinking that if the job and machine view could be
enhanced to
allow flyover/tooltip help for each icon in the view. That text
could be
used to display additional status. We are also thinking this status
would
be sent from the proxy as an additional, optional, attribute to
node and
job change events. Each time job or node status changed we would send
across a new event. The tooltip text would present whatever thye last
additional status for that node or job was. It might make sense to
extend
this to machine and task objects as well, but we don't have a need for
these to support LoadLeveler.
Nodes already have a 'nodeExtraState' attribute that can be used to
change the node icon to reflect additional job-scheduler related
states. I could extend this to any model elements that are normally
displayed as icons. Currently the tooltip for nodes shows the 'name'
attribute. It would probably be nice if the attributes that could be
displayed in the tooltip were customizable, and also available on any
model element as well.
Off the top of my head, here's what we could do:
1. Add an 'xxxExtraState' attribute to each model element. This is
just so there is something there already.
2. Add a tooltip attribute to each model element. This would be a
string set containing the names of attributes to display in the
tooltip. The presence or absence of this attribute would turn
tooltips on or off. Now I think about it, I'm not sure there is any
way to *remove* an attribute. We may have to add something.
3. Add tooltips to each model element that is normally displayed as
an icon, keyed to the tooltip attribute.
2) LoadLeveler can provide additional, detailed information on a
submitted
job, such as resources allocated to a job, reason why a job is not
running, etc that we think would be useful to the user. Our
thinking here
is that the user could right click on an entry in the job view and
get a
popup menu witt 'detailed status' as one choice. Selecting that
results in
a command to the proxy requesting status. The proxy sends back an
event
with the detailed status. The GUI proceses that event and opens a
popup,
scrollable, window displaying that status (or maybe put this info
in a new
PTP view)
Or you could just send these as attributes on the job. Attributes are
already displayed in the Properties view (Window->Show View-
>Properties) when you select a machine. I could change this so it
worked with any model element you selected. This wouldn't require
adding any new commands. Would this work for you?
3) It looks like the job view uses task indices starting at 0.
LoadLeveler
identifies the application tasks in a parallel application using their
task rank 0..n-1 and uses -1 for the master (poe) process of the
application as well as -1 for the sole task of a serial
application. Is it
possible to modify the definition of task index to allow -1 (and
maybe an
arbitary lower linit)
I'll take a look, but I don't think there will be a problem. The
'processIndex' attribute is used to calculate the ruler, so I think
this would need to be updated to work with negative indices.
Questions
1) Is the PID attribute to a process mandatory? This information is
not
provided to us by LoadLeveler, so we would like to omit it, or use
'-1' as
the pid if none is provided. We could also live with a requirement
that we
send pid 0, but that woulod be a bit inconsistent with task index
where we
have -1 as a task index.
I don't think so, but it shouldn't be in any case. It's only
displayed in the tooltip and on the process details page (when you
double click on a process icon). If you don't supply one then I think
these are just blank.
I also have a couple bugs which I will log in bugzilla when I get a
chance
Great!
Greg
