Peter,
Currently we are on our own. For my PhD I only need to separate the CPU and
Disk loads according to the login user.
Previously as you too suggested I need to refine it. I will refine it with
Balbir Singh and Naga's work. In fact this IBM team is splitting and
measuring resources per task level.
Yes I have read the early papers on their CKRM or Control frame as well. In
those they were talking about some class base measuring system. Certainly
this for the controller.
But currently I am only interested in "per task delay accounting" which
were posted to kernel group since 2005 December. In this regard both Balbir
Singh and Shailabh Naga have done a good job. Also there is avenue to build
on their work.
Thanks
Sena Seneviraten
School of Electrical and Information Engineering
Sydney University
Australia
At 11:59 AM 8/28/2006 +1000, you wrote:
sena seneviratne wrote:
Dear Sir,
Dr Fekete,
Few months ago I had some correspondence through
"[email protected]" working group.
(1) I am forwarding one of the last correspondence with this IBM team.
As they are from IBM and it looks a rather general project, I agreed to
incorporate/build on with them in the future.
This is where we concluded and agreed yet before that we had few e-mails.
Currently for the Phd, I am using division of load as per login users and
this is what I want to have for HPC and for the "Task Profiling Model".
They have done something in general at the task level. I will see how I
can use theirs or what changes I need to add on top of theirs. This will
happen after finishing the Phd. I will install their Linux patch and
test it first.
OK. Be very wary if their planned CPU controller as the model that they
intend to use (i.e. allocating different time slices) will only work with
CPU bound processes.
(2) Other work done by the researchers from Computer Science was also
involved the measuring resources, yet they have not introduced any
metric as such and therefore there is no overlapping with our project.
Their main concern was changing the internal scheduler.
Thanks
Sena Seneviratne
Computer Engineering Lab
School of Electrical and Information Engineering
Sydney University
Date: Tue, 20 Jun 2006 14:29:14 +0530
From: Balbir Singh <[email protected]>
Reply-To: [email protected]
Organization: IBM India Private Limited
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.13)
Gecko/20060413 Red Hat/1.7.13-1.4.1
X-Accept-Language: en-us, en
To: sena seneviratne <[email protected]>
Cc: [email protected], Shailabh Nagar <[email protected]>
Subject: Re: New Metrics to measure Load average
sena seneviratne wrote:
Dear Balbir Singh,
Thanks for your valuable reply.
Balbir It looks like that there is a general project where we all can
incorporate our work.
Yes it is. It is currently in -mm and we hope that it makes it into
2.6.18. The folder Documentation/accounting contains all the necessary
details for you to build on top of delay stats.
--How do you calculate disk load? Is it the
---number of uninterruptible tasks in the system? Yes I started at
that point
Few years ago the few additions I have explained, have been implemented
in linux 2.4.18 kernel at the Sydney Uni as part of a large research project.
Also few years ago I have posted many posts about this topic to this
forum. Few very experience hands were advising me in coding at that
time. To prove this I have all the e-mails with me. Yet then I had not
explained to this forum about the research project which involved
prediction algorithm as then it had not been published.
Thereafter few research papers have been published with regard to this.
1 in US.
Currently I am preparing the changes to a more recent linux patch. In
fact this is not hard as I have already changed the previous linux 2.4.18.
Please cc us when you post the patches.
Before coming to do research I had worked as a Senior software engineer
in few companies and my last was LogicaCMG. Yet as far as the kernel
programming is concerned I will ask for your comments and advice.
Let us know if you need any help for coding on top of taskstats.
Thanks
Sena Seneviratne
Computer Engineering Lab
School of Electrical and Information Engineering
Sydney University
Australia
Good luck,
Peter
--
Peter Williams [email protected]
"Learning, n. The kind of ignorance distinguishing the studious."
-- Ambrose Bierce
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