Hey Jason,
The package works.
However, I encountered performance issues with increased CPU number. The
performance was very great with up to 4 CPUs ("-n", I am assuming "number
of CPUs" equal to "number of cores" for testing multithreading workload
later). However, the system fails to boot (or maybe it was just too slow)
when I scale it >= 5 CPUs. Any ideas or suggestions?
I am working on a node with 2 x Intel(R) Xeon(R) CPU E5-2470 v2 @ 2.40GHz,
10 physic cores each (and 40 logical cores in total). I only used the fs.py
script with --cpu-type=X86KvmCPU, --mem-size=8GB and -n 4. Moreover, the
ancient Linux kernel and image from gem5 website have no performance
problem with increased CPUs.
best,
Da Zhang
On Thu, Feb 8, 2018 at 3:50 PM, Da Zhang <d...@vt.edu> wrote:
> Hi Jason
>
> The package works (I used the second one)! And it also works with the
> package you provided (https://gem5-review.googlesource.com/c/public/
> gem5/+/7301) in my another email to fix the keyboard and mouse issue for
> running later linux kernel and ubuntu. (However, there are some conflicts
> in this package, and it is a little tricky to merge them.)
>
> Now, I can run gem5 for linux kernel v4.8.13 and ubuntu 16.04.1 with
> kvm support. And the speedup is so amazing. It used to take me 20 ~ 30
> minutes to boot up the system without the kvm cpu. Now, it takes only
> several seconds!!!
>
> Thanks so much!
>
> best,
> Da
>
> On Thu, Feb 8, 2018 at 12:01 PM, Jason Lowe-Power <ja...@lowepower.com>
> wrote:
>
>> These patches "fix" the problem. However, they may not apply cleanly to
>> HEAD and they definitely are not cleanly implemented.
>>
>> https://gem5-review.googlesource.com/c/public/gem5/+/7362
>> https://gem5-review.googlesource.com/c/public/gem5/+/7361
>>
>> Cheers,
>> Jason
>>
>> On Wed, Feb 7, 2018 at 8:49 PM Da Zhang <d...@vt.edu> wrote:
>>
>>> I am trying to run fs.py with kvm support which might help speedup
>>> our simulation in full system mode. I find the cpu type X86KvmCPU which is
>>> a "kvm-based hardware virtualized cpu". But running fs.py failed with the
>>> error information:
>>>
>>> panic: KVM: Failed to enter virtualized mode (hw reason: 0x80000021)
>>>
>>> Memory Usage: 2416600 KBytes
>>>
>>> Program aborted at tick 53418967500
>>>
>>> --- BEGIN LIBC BACKTRACE ---
>>>
>>> build/X86/gem5.fast(_Z15print_backtracev+0x1f)[0xaee60f]
>>>
>>> build/X86/gem5.fast(_Z12abortHandleri+0x34)[0xaee6f4]
>>>
>>> /lib64/libpthread.so.0(+0xf5e0)[0x7f5b9ac685e0]
>>>
>>> /lib64/libc.so.6(gsignal+0x37)[0x7f5b9901c1f7]
>>>
>>> /lib64/libc.so.6(abort+0x148)[0x7f5b9901d8e8]
>>>
>>> build/X86/gem5.fast[0x6627df]
>>>
>>> build/X86/gem5.fast[0x95d518]
>>>
>>> build/X86/gem5.fast(_ZN10BaseKvmCPU13handleKvmExitEv+0x249)[0xc10859]
>>>
>>> build/X86/gem5.fast[0xbade3c]
>>>
>>> build/X86/gem5.fast(_ZN10EventQueue10serviceOneEv+0x91)[0xad4fc1]
>>>
>>> build/X86/gem5.fast(_Z9doSimLoopP10EventQueue+0xa0)[0xb5b110]
>>>
>>> build/X86/gem5.fast(_Z8simulatem+0x1f3)[0xb5b563]
>>>
>>> build/X86/gem5.fast[0x93867d]
>>>
>>> build/X86/gem5.fast[0x939c65]
>>>
>>> /lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x730a)[0x7f5b9a56b0ca]
>>>
>>> /lib64/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7ed)[0x7f5b9a56cefd]
>>>
>>> /lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x663c)[0x7f5b9a56a3fc]
>>>
>>> /lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x67bd)[0x7f5b9a56a57d]
>>>
>>> /lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x67bd)[0x7f5b9a56a57d]
>>>
>>> /lib64/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7ed)[0x7f5b9a56cefd]
>>>
>>> /lib64/libpython2.7.so.1.0(PyEval_EvalCode+0x32)[0x7f5b9a56d002]
>>>
>>> /lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x5513)[0x7f5b9a5692d3]
>>>
>>> /lib64/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7ed)[0x7f5b9a56cefd]
>>>
>>> /lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x663c)[0x7f5b9a56a3fc]
>>>
>>> /lib64/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7ed)[0x7f5b9a56cefd]
>>>
>>> /lib64/libpython2.7.so.1.0(PyEval_EvalCode+0x32)[0x7f5b9a56d002]
>>>
>>> /lib64/libpython2.7.so.1.0(+0x10043f)[0x7f5b9a58643f]
>>>
>>> /lib64/libpython2.7.so.1.0(PyRun_StringFlags+0x65)[0x7f5b9a5872a5]
>>>
>>> build/X86/gem5.fast(_Z6m5MainiPPc+0x5f)[0xad327f]
>>>
>>> build/X86/gem5.fast(main+0x33)[0x5ddf23]
>>>
>>> /lib64/libc.so.6(__libc_start_main+0xf5)[0x7f5b99008c05]
>>>
>>> build/X86/gem5.fast[0x5df8fc]
>>>
>>> --- END LIBC BACKTRACE ---
>>>
>>> Aborted (core dumped)
>>>
>>> the command is as simple as:
>>>
>>> build/X86/gem5.fast -d ~/tmp/output1/ configs/example/fs.py
>>> --mem-size=2GB --disk-image=linux-x86.img --cpu-type=X86KvmCPU
>>>
>>> Any idea? thanks in advance.
>>>
>>> best,
>>> Da
>>>
>>> _______________________________________________
>>> gem5-users mailing list
>>> gem5-users@gem5.org
>>> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
>>
>>
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