sena seneviratne wrote:Dear Sir,
Dr Fekete,
Few months ago I had some correspondence through "inux-kernel@xxxxxxxxxxxxxxx" 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 <balbir@xxxxxxxxxx>
Reply-To: balbir@xxxxxxxxxx
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
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To: sena seneviratne <auntvini@xxxxxxxxxxxxxxx>
Cc: vatsa@xxxxxxxxxx, Shailabh Nagar <nagar@xxxxxxxxxxxxxx>
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 pwil3058@xxxxxxxxxxxxxx
"Learning, n. The kind of ignorance distinguishing the studious."
-- Ambrose Bierce