Hi all,
I've been toying with the DVFS example in
https://www.gem5.org/documentation/learning_gem5/part2/arm_dvfs_support/
with a v21 distro of GEM5.
I got it working despite some small version variations...
This is the command I use to launch the simulation:
./build/ARM/gem5.opt \
Hi,I'm working on gem5 .my question1) I could run mcpat but I didn't know how
to compute power and performance from resultmy question2)I need to run DVFS on
full-system-arm . I fount this site"http://www.m5sim.org/Running_gem5"and this
paprer"Introducing DVFS-Management in a
Hi,
I'm working on gem5 .
my question1) I could run mcpat but I didn't know how to compute power and
performance from result
my question2)
I need to run DVFS on full-system-arm . I fount this site"
http://www.m5sim.org/Running_gem5"and this paprer"Introducing
DVFS-Management in a Full-System
of nevethetha ganesan
[nevethetha2...@gmail.com]
Sent: 26 February 2019 05:36
To: gem5-users@gem5.org
Subject: [gem5-users] DVFS
Hello,
I tried to enable dvfs in gem5 simulator. I defined four voltages for four
clusters. In the config.ini file I am getting the output as dvfs enabled. But
in th
Hello,
I tried to enable dvfs in gem5 simulator. I defined four voltages for four
clusters. In the config.ini file I am getting the output as dvfs enabled.
But in the clockDomain attribute in the config.ini file i m getting the
output as clock = 1 1 3 4 i can't understand what it means? Kindly
Hello Gem5 Team,
I need to implement DVFS support in Garnet. Can anyone suggest a possible
way?
Thanks,
Monobrata
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...@tamu.edu
Reply-To: gem5 users mailing list gem5-users@gem5.org
Date: Wednesday, 15 April 2015 20:04
To: gem5 users mailing list gem5-users@gem5.org
Subject: Re: [gem5-users] DVFS with self defined policies on gem5
Okay.Actually I am making the decision of what frequency which core
has
To: gem5 users mailing list gem5-users@gem5.org
Subject: Re: [gem5-users] DVFS with self defined policies on gem5
Okay.Actually I am making the decision of what frequency which core
has to run, inside the cpu...
So I guess I have to somehow communicate this to the dvfs handler which
doesn't
April 2015 20:04
To: gem5 users mailing list gem5-users@gem5.org
Subject: Re: [gem5-users] DVFS with self defined policies on gem5
Okay.Actually I am making the decision of what frequency which core
has to run, inside the cpu...
So I guess I have to somehow communicate this to the dvfs
...@tamu.edumailto:nimi...@tamu.edu
Reply-To: gem5 users mailing list
gem5-users@gem5.orgmailto:gem5-users@gem5.org
Date: Wednesday, 15
April 2015 20:04
To: gem5 users mailing list
gem5-users@gem5.orgmailto:gem5-users@gem5.org
Subject: Re:
[gem5-users] DVFS with self defined policies on gem5
Okay
Thanks Yahia for sharing that.
Can you explain a bit more as I don't have much experience with that.
Let's say I have some algo to decide the cpu freq in gem5
SRC/CPU/O3/commit_impl.hh... How can I set the file you mentioned to that
freq from here??
Thanks,
On Apr 15, 2015 2:53 AM, Yahia
Hello,
Setting the required frequency in
/sys/devices/system/cpu/cpu*/cpufreq/scaling_setspeed should not be in gem5
sources files. It can be done in a program (written in C, shell script or
any other language)
and running under Linux in FS mode.
Regards
Yahia
2015-04-15 16:55 GMT+02:00 Nimish
Okay.Actually I am making the decision of what frequency which core has
to run, inside the cpu...
So I guess I have to somehow communicate this to the dvfs handler which
doesn't look so clean
Is there any other way around or hack anybody has done??
On Apr 15, 2015 10:14 AM, Yahia
-users] DVFS with self defined policies on gem5
Okay.Actually I am making the decision of what frequency which core has to
run, inside the cpu...
So I guess I have to somehow communicate this to the dvfs handler which doesn't
look so clean
Is there any other way around or hack anybody
Hello,
You have to enable userspace governor in your kernel then you can scale the
CPU frequency by setting
/sys/devices/system/cpu/cpu*/cpufreq/scaling_setspeed file. It should work.
Regards.
Yahia
2015-04-15 4:00 GMT+02:00 Nimish Girdhar nimi...@tamu.edu:
Hello all,
I am working on a
Hello all,
I am working on a project where I have to use DVFS to change the frequency
of cores based on my evaluation of some counters that I inserted in the
gem5 o3 cpu src code.
I followed the guidelines given on
http://www.m5sim.org/Running_gem5#Experimenting_with_DVFS .
But with these steps,
Hi Giorgos,
Am Samstag, 4. April 2015, 20:18:26 schrieb Giorgos Kopanas:
I am trying to make Gem5 work with the DVFS as explained in the
website. While running in Atomic Simple it is working as intended but
when I change the cpu type to arm_detailed the simulation crushes
during boot. The
Hello,
I was running through the developing branch. The stable version works.
Thank you,
Giorgos
2015-04-06 16:46 GMT+03:00 Stephan Diestelhorst
stephan.diestelho...@arm.com:
Hi Giorgos,
Am Samstag, 4. April 2015, 20:18:26 schrieb Giorgos Kopanas:
I am trying to make Gem5 work with the
Hi
On Monday 06 April 2015 15:55:01 Giorgos Kopanas wrote:
I was running through the developing branch. The stable version works.
Great news; the volatility regarding uncacheable in the main branch
should hopefully settle soon (with the patches mentioned).
Thanks,
Stephan
-- IMPORTANT
Dear All,
I am trying to make Gem5 work with the DVFS as explained in the website.
While running in Atomic Simple it is working as intended but when I change
the cpu type to arm_detailed the simulation crushes during boot. The
message that is shown is the following:
gem5.opt:
Dear users
I am using SE mode to simulate my project.
There are some reasons that I could not use FS simulation mode.
Is there a way to run DVFS during the simulation time?
I searched the mailing list, but I could not find any solution.
Thanks,
Hadi
Hi Rahul,
I followed the instructions given here
http://www.m5sim.org/Running_gem5#Experimenting_with_DVFS, and was able
to run and test DVFS.
You may also want to read a similar question
http://comments.gmane.org/gmane.comp.emulators.m5.users/17881 that I had
posed earlier.
Hope this helps.
Hi,
I performing 4 core ARM full system simulation to test dvfs functionality.
However, when I login through m5term and check for cpufreq governor, the
directory doesn't exist. Here is the output for cpu3
*root@gem5sim:/sys/devices/system/cpu/cpu3# lsonline subsystem topology
uevent*
Hi,
I followed the sample code provided in commit 6bbb7ae309 to set up DVFS.
This got rid of the warning in Gem5
warn: Existing EnergyCtrl, but no enabled DVFSHandler found.
However, the kernel still reports saying
[0.366079] gem5_energy_ctrl_mc: gem5_mc_init: No energy controller found
Is
Just to follow up, I modified config/example/fs.py to contain the following
test_sys.cpu_clk_domain = SrcClockDomain()
test_sys.cpu_clk_domain.clock = ['1GHz','700MHz','400MHz','230MHz']
test_sys.cpu_clk_domain.domain_id = 0
test_sys.cpu_clk_domain.voltage_domain =
Hi Guru,
On Friday 05 December 2014 16:42:52 Guru Prasad via gem5-users wrote:
I followed the sample code provided in commit 6bbb7ae309 to set up DVFS.
Great!
This got rid of the warning in Gem5
warn: Existing EnergyCtrl, but no enabled DVFSHandler found.
However, the kernel still reports
Stephan,
Thanks. It works perfectly. Apologize for missing it in the documentation.
Regards
Guru
On Fri, Dec 5, 2014 at 11:55 AM, Stephan Diestelhorst via gem5-users
gem5-users@gem5.org wrote:
Hi Guru,
On Friday 05 December 2014 16:42:52 Guru Prasad via gem5-users wrote:
I followed
On 09/18/2014 12:02 PM, Lokesh Jindal wrote:
RSDP PTR in x86 FS simulation : A valid RSDP was not found Hello,
I am very new to gem5. I am trying to run x86 FS simulation with a
linux kernel(v2.6.28.4)compiled with ACPI enabled. I am seeing the
following error:
/ACPI Error (tbxfroot-0219): A
Srini,
kudos for making per-core DVFS work! A quick head¹s up: we are also
working on (per-core) DVFS support and are just polishing those patches
for consumption, should hopefully have them ready within a week or two.
On the main question, I have no hard opinion, but wonder what the
reasoning
Hi Stephan,
Thanks for the response.
I think I understand what you are saying about DVFS, but for switching cpu
models, I thought it is a must to wake the cpu (from quiesce()) since a drain
needs to be done. Please let me know if I am missing something here.
Thanks
Srini
On 03/24/14,
Hi all,
I have implemented a per-core DVFS in gem5, mimicking an on-demand governer. My
question here is if the cpu is in quiesce state(TC is suspended) while DVFS
routine is scheduled, should I wakeup() the suspended TC?.
Similarly while doing a drain and switching to a different cpu model,
Hi,
In my project I need to dump out the power profile (with time) for some
benchmarks. In that case, I think I need to dump out the GEM5 statistics to
McPAT for power calculation every a few cycles.
As I'm very new to GEM5, could anybody let me know where to start for
dumping GEM5 statistics
I think you should make modifications to the Python script that makes
GEM5 execute, such that every N cycles you dump statistics to a new
file, reset statistics and get back to execution. Probably some hints
can be found in the configs/example directory under GEM5, which
contain execution scripts.
Hi all,
I've checked the scripts under configs/example and configs/common. However,
I didn't find the option or related functions to dump the statistics every
N cycles. I do try the checkpoints option, but the output is not the same
as in m5out/stats.txt.
Could anybody let me know how I can dump
Xiao,
One of my colleagues at Notre Dame, Sheng Li, was working on a tool called
McPAT for power analysis. I believe that it has been shown to work with
gem5. This might be useful for you. Last I heard, Li and McPAT had moved
to HP: http://www.hpl.hp.com/research/mcpat/.
Patrick La Fratta
On
As Patrick said, to enable DVFS with GEM5 simulation, you have to plug
a power model. McPAT can be used to generate power estimates according
to the statistics collected from a cycle-accurate simulation with GEM5
(you need also to translate GEM5 output statistics to XML format as
required by
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