[gem5-users] Re: Running FS in example/gem5_library/x86-spec-cpu2017-benchmarks.py

[manish manchali via gem5-users]

Hi,
So i was following this exact guide here for gem5.
https://www.gem5.org/documentation/gem5art/tutorials/spec-tutorial.
I was running this on my WSL on my laptop(windows 11).  After exhaustive
searching on the net, i am pretty sure that i have enabled nested
virtualization and kvm on WSL ( i might be wrong).  May i ask what KVM
configuration change you are referring to?

P.S. Apologies this is my first time getting hands dirty on gem5 and KVM.

Thanks,
Manish M

On Sun, Apr 2, 2023 at 11:55 PM Ayaz Akram  wrote:

> Hi Manish,
>
> Can you provide more information about your test system? If you are
> running gem5 inside a virtual machine, you should ensure the KVM
> configuration change is also done on the host system.
>
> -Ayaz
>
> On Sun, Apr 2, 2023 at 5:24 PM Manish manchali via gem5-users <
> gem5-users@gem5.org> wrote:
>
>>
>>
>>  Hello
>> I was also trying to do the same.
>> /home/mmanchali/run_2_rsca/gem5-resources/src/spec-2017/gem5/build/X86/gem5.opt
>> --outdir /home/mmanchali/project/gem5-resources/output/
>> configs/run_spec.py  vmlinux-4.19.83
>> disk-image/spec-2017/spec-2017-image/spec-2017  o3  503.bwaves_r test
>>
>>
>>
>> I get the same  fatal   PerfKvmCounter::attach failed (2) error.
>> Everything else is similar to what  Abdelrahman was doing.
>>
>> The setting of perf_event_paranoid to 0 didn’t help.
>>
>> Is there something else missing?
>> I would really appreciate the help.
>> Thanks,
>> Manish M
>>
>>
>>
>> Sent from Mail  for
>> Windows
>>
>>
>> ___
>> gem5-users mailing list -- gem5-users@gem5.org
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>>
>
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[gem5-users] Re: Running FS in example/gem5_library/x86-spec-cpu2017-benchmarks.py

[Ayaz Akram via gem5-users]

Hi Manish,

Can you provide more information about your test system? If you are running
gem5 inside a virtual machine, you should ensure the KVM configuration
change is also done on the host system.

-Ayaz

On Sun, Apr 2, 2023 at 5:24 PM Manish manchali via gem5-users <
gem5-users@gem5.org> wrote:

>
>
>  Hello
> I was also trying to do the same.
> /home/mmanchali/run_2_rsca/gem5-resources/src/spec-2017/gem5/build/X86/gem5.opt
> --outdir /home/mmanchali/project/gem5-resources/output/
> configs/run_spec.py  vmlinux-4.19.83
> disk-image/spec-2017/spec-2017-image/spec-2017  o3  503.bwaves_r test
>
>
>
> I get the same  fatal   PerfKvmCounter::attach failed (2) error.
> Everything else is similar to what  Abdelrahman was doing.
>
> The setting of perf_event_paranoid to 0 didn’t help.
>
> Is there something else missing?
> I would really appreciate the help.
> Thanks,
> Manish M
>
>
>
> Sent from Mail  for
> Windows
>
>
> ___
> gem5-users mailing list -- gem5-users@gem5.org
> To unsubscribe send an email to gem5-users-le...@gem5.org
>
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[gem5-users] Re: Running FS in example/gem5_library/x86-spec-cpu2017-benchmarks.py

[Manish manchali via gem5-users]

  Hello I was also trying to do the same. /home/mmanchali/run_2_rsca/gem5-resources/src/spec-2017/gem5/build/X86/gem5.opt --outdir /home/mmanchali/project/gem5-resources/output/ configs/run_spec.py  vmlinux-4.19.83  disk-image/spec-2017/spec-2017-image/spec-2017  o3  503.bwaves_r testI get the same  fatal   PerfKvmCounter::attach failed (2) error.  Everything else is similar to what  Abdelrahman was doing.The setting of perf_event_paranoid to 0 didn’t help.Is there something else missing?I would really appreciate the help.Thanks,Manish M Sent from Mail for Windows ___
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[gem5-users] Re: Running FS in example/gem5_library/x86-spec-cpu2017-benchmarks.py

[Jason Lowe-Power via gem5-users]

Hi Abdelrahman,


> Is there a better way you can suggest using SPEC2017 in FS mode to
> evaluate my system on gem5?
>

No, there's not a better way, as far as I know :).


> My understanding is that the FS simulation is significantly slow. Any
> guidelines on how to make it as fast as possible?


You can use sampling methodologies, but there are tradeoffs there. You can
run different simulation configurations in parallel as well. Generally,
there's nothing easy to do to improve simulation speed.

Jason

On Thu, Mar 10, 2022 at 7:17 AM Abdelrahman S. Hussein <
abdelrahman.sob...@gmail.com> wrote:

> Thank you so much.
>
> There were some questions that you missed at the end of the email. I list
> them below again for convenience:
>
>
>- Is there a better way you can suggest using SPEC2017 in FS mode to
>evaluate my system on gem5?
>- My understanding is that the FS simulation is significantly slow.
>Any guidelines on how to make it as fast as possible?
>
> Above all, thanks a lot for taking time helping us. Much appreciated!
>
>
>
>
> On Thu, Mar 10, 2022 at 7:01 AM Jason Lowe-Power 
> wrote:
>
>> Hi Abdelrahman,
>>
>> From the get error message, it says:
>> "This error may be caused by a too restrictive setting
>>   in the file '/proc/sys/kernel/perf_event_paranoid'
>>   The default value was changed to 2 in kernel 4.6
>>   A value greater than 1 prevents gem5 from making
>>   the syscall to perf_event_open"
>>
>> If you put `1` or `0` in /proc/sys/kernel/perf_event_paranoid it should
>> work.
>>
>> Cheers,
>> Jason
>>
>> On Wed, Mar 9, 2022 at 9:27 PM Abdelrahman S. Hussein <
>> abdelrahman.sob...@gmail.com> wrote:
>>
>>> Hello,
>>>
>>> I am trying to run gem5 in FS mode using the following command (I am
>>> using gem5 v21.2):
>>>
>>> gem5/build/X86/gem5.opt
>>> gem5/configs/example/gem5_library/x86-spec-cpu2017-benchmarks.py --image
>>> spec-2017/disk-image/spec-2017/spec-2017-image/spec-2017 --benchmark
>>> 503.bwaves_r --size test
>>>
>>> However, I got the following error (There are details after the error,
>>> please continue reading after you check the error):
>>>
>>> build/X86/sim/simulate.cc:194: info: Entering event queue @ 0.  Starting
>>> simulation...
>>> build/X86/cpu/kvm/perfevent.cc:176: panic: PerfKvmCounter::attach
>>> recieved error EACCESS
>>>   This error may be caused by a too restrictive setting
>>>   in the file '/proc/sys/kernel/perf_event_paranoid'
>>>   The default value was changed to 2 in kernel 4.6
>>>   A value greater than 1 prevents gem5 from making
>>>   the syscall to perf_event_open
>>> Memory Usage: 3817816 KBytes
>>> build/X86/cpu/kvm/perfevent.ccProgram aborted at tick 0
>>> :176: panic: PerfKvmCounter::attach recieved error EACCESS
>>>   This error may be caused by a too restrictive setting
>>>   in the file '/proc/sys/kernel/perf_event_paranoid'
>>>   The default value was changed to 2 in kernel 4.6
>>>   A value greater than 1 prevents gem5 from making
>>>   the syscall to perf_event_open
>>> Memory Usage: 3817816 KBytes
>>> ./spec_fs_run.sh: line 16: 1648681 Aborted
>>>
>>> I have done some checking:
>>>
>>>- Ran kvm-ok to make sure that KVM is working:
>>>$kvm-ok
>>>INFO: /dev/kvm exists
>>>KVM acceleration can be used
>>>
>>>- Also, I checked the value
>>>inside /proc/sys/kernel/perf_event_paranoid
>>>$cat /proc/sys/kernel/perf_event_paranoid
>>>3
>>>
>>>- The SPEC17 is created by following the instructions in:
>>>https://gem5art.readthedocs.io/en/v1.0.0/tutorials/spec2017-tutorial.html
>>>
>>>
>>> Questions:
>>>
>>>- How to solve this error?
>>>
>>>- Is it safe to modify the /proc/sys/kernel/perf_event_paranoid of
>>>the linux running on my host machine to 1, in case this solves the 
>>> problem?
>>>
>>>- Is there a better way you can suggest using SPEC2017 in FS mode to
>>>evaluate my system on gem5?
>>>
>>>
>>>
>>> Thanks.
>>>
>>> --
>>>
>>> *Best,Abdelrahman Hussein*
>>>
>> --
>
> --
>
> *Best,Abdelrahman Hussein*
>
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[gem5-users] Re: Running FS in example/gem5_library/x86-spec-cpu2017-benchmarks.py

[Abdelrahman S. Hussein via gem5-users]

Thank you so much.

There were some questions that you missed at the end of the email. I list
them below again for convenience:


   - Is there a better way you can suggest using SPEC2017 in FS mode to
   evaluate my system on gem5?
   - My understanding is that the FS simulation is significantly slow. Any
   guidelines on how to make it as fast as possible?

Above all, thanks a lot for taking time helping us. Much appreciated!




On Thu, Mar 10, 2022 at 7:01 AM Jason Lowe-Power 
wrote:

> Hi Abdelrahman,
>
> From the get error message, it says:
> "This error may be caused by a too restrictive setting
>   in the file '/proc/sys/kernel/perf_event_paranoid'
>   The default value was changed to 2 in kernel 4.6
>   A value greater than 1 prevents gem5 from making
>   the syscall to perf_event_open"
>
> If you put `1` or `0` in /proc/sys/kernel/perf_event_paranoid it should
> work.
>
> Cheers,
> Jason
>
> On Wed, Mar 9, 2022 at 9:27 PM Abdelrahman S. Hussein <
> abdelrahman.sob...@gmail.com> wrote:
>
>> Hello,
>>
>> I am trying to run gem5 in FS mode using the following command (I am
>> using gem5 v21.2):
>>
>> gem5/build/X86/gem5.opt
>> gem5/configs/example/gem5_library/x86-spec-cpu2017-benchmarks.py --image
>> spec-2017/disk-image/spec-2017/spec-2017-image/spec-2017 --benchmark
>> 503.bwaves_r --size test
>>
>> However, I got the following error (There are details after the error,
>> please continue reading after you check the error):
>>
>> build/X86/sim/simulate.cc:194: info: Entering event queue @ 0.  Starting
>> simulation...
>> build/X86/cpu/kvm/perfevent.cc:176: panic: PerfKvmCounter::attach
>> recieved error EACCESS
>>   This error may be caused by a too restrictive setting
>>   in the file '/proc/sys/kernel/perf_event_paranoid'
>>   The default value was changed to 2 in kernel 4.6
>>   A value greater than 1 prevents gem5 from making
>>   the syscall to perf_event_open
>> Memory Usage: 3817816 KBytes
>> build/X86/cpu/kvm/perfevent.ccProgram aborted at tick 0
>> :176: panic: PerfKvmCounter::attach recieved error EACCESS
>>   This error may be caused by a too restrictive setting
>>   in the file '/proc/sys/kernel/perf_event_paranoid'
>>   The default value was changed to 2 in kernel 4.6
>>   A value greater than 1 prevents gem5 from making
>>   the syscall to perf_event_open
>> Memory Usage: 3817816 KBytes
>> ./spec_fs_run.sh: line 16: 1648681 Aborted
>>
>> I have done some checking:
>>
>>- Ran kvm-ok to make sure that KVM is working:
>>$kvm-ok
>>INFO: /dev/kvm exists
>>KVM acceleration can be used
>>
>>- Also, I checked the value
>>inside /proc/sys/kernel/perf_event_paranoid
>>$cat /proc/sys/kernel/perf_event_paranoid
>>3
>>
>>- The SPEC17 is created by following the instructions in:
>>https://gem5art.readthedocs.io/en/v1.0.0/tutorials/spec2017-tutorial.html
>>
>>
>> Questions:
>>
>>- How to solve this error?
>>
>>- Is it safe to modify the /proc/sys/kernel/perf_event_paranoid of
>>the linux running on my host machine to 1, in case this solves the 
>> problem?
>>
>>- Is there a better way you can suggest using SPEC2017 in FS mode to
>>evaluate my system on gem5?
>>
>>
>>
>> Thanks.
>>
>> --
>>
>> *Best,Abdelrahman Hussein*
>>
> --

--

*Best,Abdelrahman Hussein*
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[gem5-users] Re: Running FS in example/gem5_library/x86-spec-cpu2017-benchmarks.py

[Jason Lowe-Power via gem5-users]

Hi Abdelrahman,

>From the get error message, it says:
"This error may be caused by a too restrictive setting
  in the file '/proc/sys/kernel/perf_event_paranoid'
  The default value was changed to 2 in kernel 4.6
  A value greater than 1 prevents gem5 from making
  the syscall to perf_event_open"

If you put `1` or `0` in /proc/sys/kernel/perf_event_paranoid it should
work.

Cheers,
Jason

On Wed, Mar 9, 2022 at 9:27 PM Abdelrahman S. Hussein <
abdelrahman.sob...@gmail.com> wrote:

> Hello,
>
> I am trying to run gem5 in FS mode using the following command (I am using
> gem5 v21.2):
>
> gem5/build/X86/gem5.opt
> gem5/configs/example/gem5_library/x86-spec-cpu2017-benchmarks.py --image
> spec-2017/disk-image/spec-2017/spec-2017-image/spec-2017 --benchmark
> 503.bwaves_r --size test
>
> However, I got the following error (There are details after the error,
> please continue reading after you check the error):
>
> build/X86/sim/simulate.cc:194: info: Entering event queue @ 0.  Starting
> simulation...
> build/X86/cpu/kvm/perfevent.cc:176: panic: PerfKvmCounter::attach recieved
> error EACCESS
>   This error may be caused by a too restrictive setting
>   in the file '/proc/sys/kernel/perf_event_paranoid'
>   The default value was changed to 2 in kernel 4.6
>   A value greater than 1 prevents gem5 from making
>   the syscall to perf_event_open
> Memory Usage: 3817816 KBytes
> build/X86/cpu/kvm/perfevent.ccProgram aborted at tick 0
> :176: panic: PerfKvmCounter::attach recieved error EACCESS
>   This error may be caused by a too restrictive setting
>   in the file '/proc/sys/kernel/perf_event_paranoid'
>   The default value was changed to 2 in kernel 4.6
>   A value greater than 1 prevents gem5 from making
>   the syscall to perf_event_open
> Memory Usage: 3817816 KBytes
> ./spec_fs_run.sh: line 16: 1648681 Aborted
>
> I have done some checking:
>
>- Ran kvm-ok to make sure that KVM is working:
>$kvm-ok
>INFO: /dev/kvm exists
>KVM acceleration can be used
>
>- Also, I checked the value inside /proc/sys/kernel/perf_event_paranoid
>$cat /proc/sys/kernel/perf_event_paranoid
>3
>
>- The SPEC17 is created by following the instructions in:
>https://gem5art.readthedocs.io/en/v1.0.0/tutorials/spec2017-tutorial.html
>
>
> Questions:
>
>- How to solve this error?
>
>- Is it safe to modify the /proc/sys/kernel/perf_event_paranoid of the
>linux running on my host machine to 1, in case this solves the problem?
>
>- Is there a better way you can suggest using SPEC2017 in FS mode to
>evaluate my system on gem5?
>
>
>
> Thanks.
>
> --
>
> *Best,Abdelrahman Hussein*
>
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