Hi Eng Paul, Thanks for your reply. So would you give me an estimation of time it needs to implement a scheduling algorithm in the Linux kernel(as i have very limited time)?
Concerning the assumption that you mentioned: Yes ,the assumption is correct Thank you for your time and help. Best Regards Wael Amr On Tue, Apr 24, 2012 at 7:51 PM, Paul Rosenfeld <[email protected]>wrote: > Is modifying the Linux kernel "easy"? No, unfortunately it is not. Modern > operating systems are extremely complex and have evolved over decades to > try to get the best performance possible -- the Linux kernel is no > exception. > > When you say "thread" I'll assume you mean hardware thread, since a single > threaded benchmark will be a single software thread (linux makes no > distinction between a thread and a process). If this assumption is correct > then it is pretty simple to pin a particular benchmark to a particular > hardware thread using some OS affinity calls. You can search for "taskset" > or "sched_setaffinity" to find more details. > > On Tue, Apr 24, 2012 at 12:08 PM, wael Amr <[email protected]>wrote: > >> Hi all, >> >> Really many great thanks for your time and support. >> As i wrote before,i need to implement scheduling algorithm for tasks >> among multicore to decrease miss rate for the shared cache. >> Is modifying in the linux kernel difficult and taking large time ? >> or >> Is it easy ? >> >> I am asking this question because i used SESC simulator and it took large >> time to understand and modify ,then after that i found that SESC simulator >> has NO multiprogramming,so i am searching for another simulator and i have >> limited time to finish my research. >> >> Second question about the mapping of the benchmarks to the threads: >> Are the threads sharing the same benchmark ? >> or >> There is no sharing ,for example : >> We have 5 threads and 5 benchmarks,so we can assign thread 0 to the first >> benchmark,then we can assign thread 1 to the second one and so on. >> >> I would appreciate if you could reply at your earliest convenience. >> Thank you in advance for your help. >> Best Regards >> Wael Amr >> >> On Mon, Apr 23, 2012 at 6:58 AM, avadh patel <[email protected]> wrote: >> >>> >>> On Sun, Apr 22, 2012 at 8:55 PM, wael Amr <[email protected]>wrote: >>> >>>> Hi Eng.Avadh, >>>> >>>> Thanks a lot for your support. >>>> please i have another question. >>>> >>>> is it possible to run this simulator on Mac OS which is unix based? >>>> >>>> I have never tried compiling/running Marss under Mac OS. Though QEMU >>> is designed to work on all platforms but we have never tested it. >>> Has anyone on mailing-list ever tried running Marss under Mac OS? >>> May be you can try and report the issues/patches!! >>> >>> - Avadh >>> >>> Thank in advance for your time and support. >>>> Best Regards >>>> Wael Amr >>>> >>>> >>>> On Sun, Apr 22, 2012 at 7:03 PM, avadh patel <[email protected]>wrote: >>>> >>>>> >>>>> >>>>> On Sun, Apr 22, 2012 at 9:29 AM, wael Amr <[email protected]>wrote: >>>>> >>>>>> Hi, >>>>>> >>>>>> Really Great Thanks for your reply and support. >>>>>> Actually i have a confusion . >>>>>> Is the linux kernel is represented by certain class in the Marss >>>>>> simulator ? >>>>>> or >>>>>> Do you mean the real linux kernel of the used linux platform (e.g. >>>>>> ubantu ,fedora,...) as i am using MAC OS? >>>>>> >>>>>> Yes its a real linux kernel. Because Marss boots a Virtual Machine >>>>> that contains a full linux distribution including a kernel. >>>>> If you are not much familiar with Qemu and VM, then checkout how Qemu >>>>> works. That will give an idea what Marss simulates. >>>>> >>>>> - Avadh >>>>> >>>>> >>>>>> Thank you in advance for your time. >>>>>> Thanks >>>>>> Best Regards >>>>>> Wael Amr >>>>>> >>>>>> On Sun, Apr 22, 2012 at 5:01 PM, avadh patel <[email protected]>wrote: >>>>>> >>>>>>> >>>>>>> On Sat, Apr 21, 2012 at 9:28 AM, wael Amr >>>>>>> <[email protected]>wrote: >>>>>>> >>>>>>>> Hello All, >>>>>>>> >>>>>>>> I am a master student and working on a research for scheduling >>>>>>>> tasks among multicore platforms to decrease miss rate among second >>>>>>>> level >>>>>>>> shared cache. >>>>>>>> So i am investigating in Marss to check if i can use Marss to >>>>>>>> implement the scheduling algorithm for arranging the tasks or not. >>>>>>>> >>>>>>>> Marss can be suitable simulator environment for your project. You >>>>>>> can easily setup custom linux kernel in Marss. >>>>>>> Checkout this wiki page on using Marss with modified linux kernel: >>>>>>> http://marss86.org/~marss86/index.php/Linux_Kernel_Development >>>>>>> >>>>>>> There is one catch that currently Marss doesn't implement MSR >>>>>>> counters. So if you are looking to use those in your project you might >>>>>>> have to implement them or use ptlcall interface to communicate between >>>>>>> Marss and kernel. >>>>>>> >>>>>>> - Avadh >>>>>>> >>>>>>> So please would anyone help me or give me any opinion/hint in this >>>>>>>> point ? >>>>>>>> >>>>>>>> Any help will be really highly appreciated. >>>>>>>> >>>>>>>> Thank you in advance for time and cooperation. >>>>>>>> >>>>>>>> Best Regards >>>>>>>> Wael Amr >>>>>>>> >>>>>>>> _______________________________________________ >>>>>>>> http://www.marss86.org >>>>>>>> Marss86-Devel mailing list >>>>>>>> [email protected] >>>>>>>> https://www.cs.binghamton.edu/mailman/listinfo/marss86-devel >>>>>>>> >>>>>>>> >>>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> http://www.marss86.org >>>>>> Marss86-Devel mailing list >>>>>> [email protected] >>>>>> https://www.cs.binghamton.edu/mailman/listinfo/marss86-devel >>>>>> >>>>>> >>>>> >>>> >>>> _______________________________________________ >>>> http://www.marss86.org >>>> Marss86-Devel mailing list >>>> [email protected] >>>> https://www.cs.binghamton.edu/mailman/listinfo/marss86-devel >>>> >>>> >>> >> >> _______________________________________________ >> http://www.marss86.org >> Marss86-Devel mailing list >> [email protected] >> https://www.cs.binghamton.edu/mailman/listinfo/marss86-devel >> >> >
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