Respected Sir/Madam, I am trying to study the effect of Scheduler Policies on Energy Consumption of Portable Device. This will be achieved by modifying the current Completely Fair Scheduler by changing the range of nice values from 40 to 100 and adding a new scheduing policy. CFS uses SCHED_RR, SCHED_FCFS, SCHED_OTHER, SCHED_BATCH Policy for scheduling any process. The idea is to insert a new scheduling policy by modifying the header files. Can this be a good topic to carry out research.I welcome any other idea related Linux Kernel CFS. Regards, SUNIITA
On Mon, Feb 22, 2016 at 12:24 PM, SUNITA <sunitad100@gmail.com> wrote:
Respected Sir/Madam, I am trying to study the effect of Scheduler Policies on Energy Consumption of Portable Device.
This will be achieved by modifying the current Completely Fair Scheduler by changing the range of nice values from 40 to 100 and adding a new scheduing policy. CFS uses SCHED_RR, SCHED_FCFS, SCHED_OTHER, SCHED_BATCH Policy for scheduling any process. The idea is to insert a new scheduling policy by modifying the header files.
Can this be a good topic to carry out research.I welcome any other idea related Linux Kernel CFS.
Regards, SUNIITA
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Hi Suniita Sounds challenging. It might be good topic. Just make sure you understand how to measure power consumption and prepare various scenario of load simulation to mimic real power consumption pattern. -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com This email has been sent from a virus-free computer protected by Avast. www.avast.com <https://www.avast.com/sig-email> <#DDB4FAA8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
On Mon, Feb 22, 2016 at 10:54:54AM +0530, SUNITA wrote:
Respected Sir/Madam, I am trying to study the effect of Scheduler Policies on Energy Consumption of Portable Device.
There are lots of people currently working on this, and have been for many years. I know of at least 3 complete implementations at the moment (two of which ship in some Android phones), so I would suggest working with one of those groups to try to get their code merged into the Linux kernel. To create a 4th implementation would seem like a bit of a redundant effort. Search the archives of lwn.net for details about this if you are interested. good luck! greg k-h
On 22 Feb 2016 21:48, "Greg KH" <greg@kroah.com> wrote:
On Mon, Feb 22, 2016 at 10:54:54AM +0530, SUNITA wrote:
Respected Sir/Madam, I am trying to study the effect of Scheduler Policies on Energy Consumption of Portable Device.
There are lots of people currently working on this, and have been for many years. I know of at least 3 complete implementations at the moment (two of which ship in some Android phones), so I would suggest working with one of those groups to try to get their code merged into the Linux kernel. To create a 4th implementation would seem like a bit of a redundant effort.
Search the archives of lwn.net for details about this if you are interested.
good luck!
greg k-h
Hello, I want to measure the battery usage of various applications in linux. I executed powerstat and powertop tools. Are there any other tools which indicate the power consumption by programs in linux. I want to calculate the power used by various scheduling programs. Also can Sysbench be an alternative to Mibench. Regards, Sunita On 2/22/16, Greg KH <greg@kroah.com> wrote:
On Mon, Feb 22, 2016 at 10:54:54AM +0530, SUNITA wrote:
Respected Sir/Madam, I am trying to study the effect of Scheduler Policies on Energy Consumption of Portable Device.
There are lots of people currently working on this, and have been for many years. I know of at least 3 complete implementations at the moment (two of which ship in some Android phones), so I would suggest working with one of those groups to try to get their code merged into the Linux kernel. To create a 4th implementation would seem like a bit of a redundant effort.
Search the archives of lwn.net for details about this if you are interested.
good luck!
greg k-h
There are four scheduling policies. Is it feasible if i design a scheduling policy which will overcome the drawbacks of sched_RR. The purpose is to reduce the number of context switches. I have to modify fair.c Regards, Sunita On 25 Feb 2016 08:10, "SUNITA" <sunitad100@gmail.com> wrote:
Hello,
I want to measure the battery usage of various applications in linux. I executed powerstat and powertop tools. Are there any other tools which indicate the power consumption by programs in linux.
I want to calculate the power used by various scheduling programs.
Also can Sysbench be an alternative to Mibench.
Regards, Sunita
On 2/22/16, Greg KH <greg@kroah.com> wrote:
On Mon, Feb 22, 2016 at 10:54:54AM +0530, SUNITA wrote:
Respected Sir/Madam, I am trying to study the effect of Scheduler Policies on Energy Consumption of Portable Device.
There are lots of people currently working on this, and have been for many years. I know of at least 3 complete implementations at the moment (two of which ship in some Android phones), so I would suggest working with one of those groups to try to get their code merged into the Linux kernel. To create a 4th implementation would seem like a bit of a redundant effort.
Search the archives of lwn.net for details about this if you are interested.
good luck!
greg k-h
On Tue, Mar 01, 2016 at 07:00:36AM +0530, SUNITA wrote:
There are four scheduling policies. Is it feasible if i design a scheduling policy which will overcome the drawbacks of sched_RR. The purpose is to reduce the number of context switches. I have to modify fair.c
That sounds like a homework question, why are you trying to do this without doing research into how it has already been solved 4 different times? Hint, if you have an Android phone, odds are one of those solutions is in the kernel in it, go get the source tree and look at the changes that were made. good luck, greg k-h
I located the following implementations on lwn.net for finding the energy consumption pattern http://lwn.net/Articles/603504/ http://lwn.net/Articles/597279/ http://lwn.net/Articles/558234/ http://lwn.net/Articles/557822/ Are there any more articles which i have missed. Regards Sunita On 2/22/16, Greg KH <greg@kroah.com> wrote:
On Mon, Feb 22, 2016 at 10:54:54AM +0530, SUNITA wrote:
Respected Sir/Madam, I am trying to study the effect of Scheduler Policies on Energy Consumption of Portable Device.
There are lots of people currently working on this, and have been for many years. I know of at least 3 complete implementations at the moment (two of which ship in some Android phones), so I would suggest working with one of those groups to try to get their code merged into the Linux kernel. To create a 4th implementation would seem like a bit of a redundant effort.
Search the archives of lwn.net for details about this if you are interested.
good luck!
greg k-h
On 03/01/2016 10:07 AM, SUNITA wrote:
I located the following implementations on lwn.net for finding the energy consumption pattern
http://lwn.net/Articles/603504/ http://lwn.net/Articles/597279/ http://lwn.net/Articles/558234/ http://lwn.net/Articles/557822/
Are there any more articles which i have missed.
what kind of question is that? this is a mailing list in kernel internals for newbies. This is not hand holding for HW. If that is all the articles you found then that is all you will see. BTW Greg gave you the answer to your inquire on a silver platter and you ignored it. Ruben -- So many immigrant groups have swept through our town that Brooklyn, like Atlantis, reaches mythological proportions in the mind of the world - RI Safir 1998 http://www.mrbrklyn.com DRM is THEFT - We are the STAKEHOLDERS - RI Safir 2002 http://www.nylxs.com - Leadership Development in Free Software http://www2.mrbrklyn.com/resources - Unpublished Archive http://www.coinhangout.com - coins! http://www.brooklyn-living.com Being so tracked is for FARM ANIMALS and and extermination camps, but incompatible with living as a free human being. -RI Safir 2013
participants (4)
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Greg KH -
Mulyadi Santosa -
Ruben Safir -
SUNITA