Hello, As you may now know, Jaishankar, McPAT (an external tool) can produce power profile given architecture info and stats input got from gem5.
Well, I think, the problem is that gem5 still can't take into account temperature/power to produce performance stats. This article, https://docs.google.com/viewer?url=http%3A%2F%2Fwww.hpl.hp.com%2Fresearch%2Fmcpat%2Fmicro09.pdf, says McPAT could feedback a performance simulator (i.e. gem5) with runtime power or even temperature, if available. The performance vs temperature/power is important to my work too. Please, correct me if in wrong. Regards, -- Fernando A. Endo, PhD student and researcher CEA Lab and Université de Grenoble, UJF France 2012/10/16 Andreas Hansson <andreas.hans...@arm.com> > Hi Jaishankar, > > If you really want to do a power-controlled Linux-scheduler then it sounds > more like a PhD thesis (or two) to me :) > > Currently, there is no on-line power model in gem5, so this is the first > thing to address, and this applies to CPU, caches, interconnect, DRAM, I/O > etc. The power monitors also have to be exposed to the OS one way or > another, which would require driver support. Once all that is working, the > bits and pieces you mention have to be solved, I.e. given a total > power/energy reading, how do you pin it to different threads/applications. > Lots to do in other words. > > Good luck, > > Andreas > > > From: Jaishankar Thommandram <jaish...@buffalo.edu<mailto: > jaish...@buffalo.edu>> > Reply-To: gem5 users mailing list <gem5-users@gem5.org<mailto: > gem5-users@gem5.org>> > Date: Tuesday, 16 October 2012 00:08 > To: "gem5-users@gem5.org<mailto:gem5-users@gem5.org>" <gem5-users@gem5.org > <mailto:gem5-users@gem5.org>> > Subject: [gem5-users] How to do power profiling of a benchmark program? Do > I need gem5 for this? > > Hello, > > I am a Masters student, my project is to do Task scheduling among > Multicore CPU - Dynamic temperature aware scheduling - DTAS. > I am a newbie user of architecture/perfomance simulator tools. > > I just have a basic idea of how to proceed with the project.. My first > step is to do the power profiling.. > > I need a power profile for a benchmark program. I will give this profile > as input to my task scheduler, that I will create later on. Can you tell me > what is the tool that I need for creating power profile? and also some > basics on how to go about it? > I want to create a log of events (events are recorded when a threshold > value of temperature is crossed by the task) and get a complete queue of > all events with - > Each element (t, P, loc) having values > t- time of execution, > P- change in power caused by this event. > loc- indicating which core is utilized. > > I am a new user, have just installed linux and had built gem5. I don't > know if gem5 is the tool I would need to use for power profiling. > Should I use Wattch/Simplescalar? > > p.s: i haven't created the scheduler yet,, want to start off by doing the > power profiling first. So, any help or suggestion is welcome! > > > Regards, > > Jaishankar > > -- IMPORTANT NOTICE: The contents of this email and any attachments are > confidential and may also be privileged. If you are not the intended > recipient, please notify the sender immediately and do not disclose the > contents to any other person, use it for any purpose, or store or copy the > information in any medium. Thank you. > > _______________________________________________ > gem5-users mailing list > gem5-users@gem5.org > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
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