date:20221103

[gem5-users] Re: panic: KVM: Failed to set register (0x6030000000100042) value

2022-11-03 Thread 廖雄飛

Hi Giacomo,

Thanks a lot for your quick response. Your suggestion does help.

With the updates contained in the three files indicated by the two Jira 
tickets, I still saw some error as below. I guess there are some changes not 
included in these two tickets.

--
Global frequency set at 1 ticks per second
info: Simulated platform: VExpress_GEM5_V1
AttributeError: object 'ArmDefaultRelease' has no attribute 'remove'
  (C++ object is not yet constructed, so wrapped C++ methods are unavailable.)

At:
  build/ARM/python/m5/SimObject.py(795): __getattr__
  build/ARM/arch/arm/ArmSystem.py(113): for_kvm
  configs/example/arm/fs_bigLITTLE.py(313): _build_kvm
  configs/example/arm/fs_bigLITTLE.py(287): build
  configs/example/arm/fs_bigLITTLE.py(388): main
  configs/example/arm/fs_bigLITTLE.py(398): 
  build/ARM/python/m5/main.py(434): main

--

However, after I switched to develop branch, the fixes are working and the 
full-system simulation is up. Hopefully, it can run to the login terminal.

Thanks a lot again.

All the best,
Xiongfei

From: Giacomo Travaglini 
mailto:giacomo.travagl...@arm.com>>
Sent: Thursday, November 3, 2022 8:07 PM
To: The gem5 Users mailing list 
mailto:gem5-users@gem5.org>>
Cc: Xiongfei Liao (廖雄飛) 
mailto:xiongfei.l...@mediatek.com>>
Subject: Re: panic: KVM: Failed to set register (0x603000100042) value

Hello, it was a bug which got fixed by the following patches, which are merged 
in develop and will be part of next release

https://gem5-review.googlesource.com/c/public/gem5/+/64072/4
https://gem5-review.googlesource.com/c/public/gem5/+/64073/4

Let me know if it works

Kind Regards

Giacomo

From: Xiongfei Liao (廖雄飛) via gem5-users 
mailto:gem5-users@gem5.org>>
Date: Thursday, 3 November 2022 at 11:19
To: gem5-users@gem5.org 
mailto:gem5-users@gem5.org>>
Cc: Xiongfei Liao (廖雄飛) 
mailto:xiongfei.l...@mediatek.com>>
Subject: [gem5-users] panic: KVM: Failed to set register (0x603000100042) 
value
Hi,

We try to run a full-system simulation using ARMV8KvmCPU. The simulation cannot 
get started due to the below failure of setting register PSTATE.

-
… …
  0: system.kvm_vm: Mapping 8 memory region(s)
  0: system.kvm_vm: Mapping region: 0x0xaebcb000 -> 0x0 [size: 
0x400]
  0: system.kvm_vm: Mapping region: 0x0xbb027000 -> 0x400 [size: 
0x4]
  0: system.kvm_vm: Mapping region: 0x0xacbcb000 -> 0x600 [size: 
0x200]
  0: system.kvm_vm: Mapping region: 0x0xa8bcb000 -> 0x800 [size: 
0x400]
  0: system.kvm_vm: Mapping region: 0x0xa4bcb000 -> 0xc00 [size: 
0x400]
  0: system.kvm_vm: Mapping region: 0x0xa2bcb000 -> 0x1800 [size: 
0x200]
  0: system.kvm_vm: Mapping region: 0x0xbc1b4000 -> 0x2e00 [size: 
0x8000]
  0: system.kvm_vm: Mapping region: 0x0x22bcb000 -> 0x8000 [size: 
0x8000]
build/ARM/cpu/kvm/base.cc:150: info: KVM: Coalesced MMIO disabled by config.
  0: system.littleCluster.cpus:   MPIDR(EL1) := 0x8000
build/ARM/dev/arm/energy_ctrl.cc:252: warn: Existing EnergyCtrl, but no enabled 
DVFSHandler found.
build/ARM/sim/simulate.cc:194: info: Entering event queue @ 0.  Starting 
simulation...
  0: system.littleCluster.cpus: Attaching cycle counter...
  0: system.littleCluster.cpus: In updateKvmState():
  0: system.littleCluster.cpus:   PSTATE := 0x3cd
build/ARM/cpu/kvm/base.cc:863: panic: KVM: Failed to set register 
(0x603000100042) value (errno: 22)
Memory Usage: 2693544 KBytes
Program aborted at tick 0
… …
---

This register 0x603000100042 is legal and 64-bit based on the document at 
the link: 
https://www.kernel.org/doc/Documentation/virtual/kvm/api.txt

What could be the reason for this? ARM CPU or software or anything else?

Any tips/suggestions are appreciated.

Thanks in advance.

All the best,
Xiongfei Liao

===

The environment settings are as below.
Host:
ARM ser

[gem5-users] Re: HPCG on RISCV

2022-11-03 Thread Hoa Nguyen via gem5-users

Hi Nikos,

The problem you ran into with the FS mode seems to be the same problem
described here [1] [2].
Can you try downloading the changes and let me know if it fixes the problem?

[1] https://gem5-review.googlesource.com/c/public/gem5/+/65272
[2] https://gem5-review.googlesource.com/c/public/gem5/+/65273

Regards,
Hoa Nguyen

On Tue, Nov 1, 2022 at 2:15 PM Hoa Nguyen  wrote:

> Hi all,
>
> I also ran into the same problem using another benchmark. I want to note
> that this problem also appears when using the AtomicCPU.
>
> Regards,
> Hoa Nguyen
>
> On Tue, Nov 1, 2022 at 3:02 AM Νικόλαος Ταμπουρατζής via gem5-users <
> gem5-users@gem5.org> wrote:
>
>> Dear Boddy,
>>
>> Thank you for the update! Please let me know when the accuracy issue
>> will be resolved because I cannot execute any benchmark in RISCV FS
>> mode (I am wondering if any other user faces the same problem).
>>
>> Best regards,
>> Nikos
>>
>>
>> Quoting Bobby Bruce via gem5-users :
>>
>> > You mean this bug? Unfortunately not, I've been very busy with the
>> upcoming
>> > gem5 release and haven't had time to investigate this further.
>> >
>> > --
>> > Dr. Bobby R. Bruce
>> > Room 3050,
>> > Kemper Hall, UC Davis
>> > Davis,
>> > CA, 95616
>> >
>> > web: https://www.bobbybruce.net
>> >
>> >
>> > On Mon, Oct 31, 2022 at 1:45 AM Νικόλαος Ταμπουρατζής via gem5-users <
>> > gem5-users@gem5.org> wrote:
>> >
>> >> Dear Bobby, Jason, all,
>> >>
>> >> Is there any update about the accuracy of RISC-V FS?
>> >>
>> >> Best regards,
>> >> Nikos
>> >>
>> >>
>> >> Quoting Bobby Bruce :
>> >>
>> >> > Jason and I had a theory that this may be due to the "Rounding Mode"
>> for
>> >> > floating pointing being set incorrectly in FS mode. That's set via a
>> >> macro
>> >> > here:
>> >> >
>> >>
>> https://gem5.googlesource.com/public/gem5/+/refs/tags/v22.0.0.2/src/arch/riscv/fp_inst.hh#36
>> >> >
>> >> > I manually expanded the macro here:
>> >> >
>> >>
>> https://gem5.googlesource.com/public/gem5/+/refs/tags/v22.0.0.2/src/arch/riscv/isa/decoder.isa#1495
>> >> ,
>> >> > inside the "fsqrt_d" definition then compiled "build/ALL/gem5.debug".
>> >> Then
>> >> > used gdb to add a breakpoint in the "Fsqrt_d::execute" function (in
>> the
>> >> > generated "build/ALL/arch/riscv/generated/exec-ns.cc.inc" file).
>> >> >
>> >> > ```
>> >> > gdb build/ALL/gem5.opt
>> >> > break Fsqrt_d::execute
>> >> > run bug-recreation/se-mode-run.py # or `run
>> >> bug-recreation/fs-mode-run.py`
>> >> > ```
>> >> >
>> >> > Stepping through with gdb I the rounding mode is `0` for SE mode and
>> `0`
>> >> > for FS mode as well. So, no luck with that theory.
>> >> >
>> >> > My new theory is that this bug has something to do with thread
>> context
>> >> > switching being implemented incorrectly in RISC-V somehow. I find it
>> >> > strange that the sqrt(1) works fine for a while (i.e. returns `1`)
>> then
>> >> > suddenly starts returning zero after a certain point in the
>> execution. In
>> >> > addition, it's odd that the loop is not returning the same value each
>> >> time
>> >> > despite executing the same code. It'd make sense to me that the
>> thread is
>> >> > being stored and then resumed with some corruption of the floating
>> point
>> >> > data. This would also explain why this bug only occurs in FS mode.
>> >> >
>> >> > I'll try to find time to figure out a good test for this. If anyone
>> has
>> >> any
>> >> > other theories or ideas then let me know.
>> >> >
>> >> > --
>> >> > Dr. Bobby R. Bruce
>> >> > Room 3050,
>> >> > Kemper Hall, UC Davis
>> >> > Davis,
>> >> > CA, 95616
>> >> >
>> >> > web: https://www.bobbybruce.net
>> >> >
>> >> >
>> >> > On Fri, Oct 7, 2022 at 12:50 PM Νικόλαος Ταμπουρατζής <
>> >> > ntampourat...@ece.auth.gr> wrote:
>> >> >>
>> >> >> Dear Jason & Boddy,
>> >> >>
>> >> >> Unfortunately, I have tried my simple example without the sqrt
>> >> >> function and the problem remains. Specifically, I have the following
>> >> >> simple code:
>> >> >>
>> >> >>
>> >> >> #include 
>> >> >> #include 
>> >> >>
>> >> >> int main(){
>> >> >>
>> >> >>  int dim = 1024;
>> >> >>
>> >> >>  double result;
>> >> >>
>> >> >>  for (int iter = 0; iter < 2; iter++){
>> >> >>  result = 0;
>> >> >>  for (int i = 0; i < dim; i++){
>> >> >>  for (int j = 0; j < dim; j++){
>> >> >>  result += i * j;
>> >> >>  }
>> >> >>  }
>> >> >>  printf("Final Result: %lf\n", result);
>> >> >>  }
>> >> >> }
>> >> >>
>> >> >>
>> >> >> In the above code, the correct result is 274341298176.00 (from
>> >> >> RISCV-SE mode and x86), while in FS mode I get sometimes the correct
>> >> >> result and other times a different number.
>> >> >>
>> >> >> Best regards,
>> >> >> Nikos
>> >> >>
>> >> >>
>> >> >> Quoting Jason Lowe-Power :
>> >> >>
>> >> >> > I have an idea...
>> >> >> >
>> >> >> > Have you put a breakpoint in the implementation of the fsqrt_d
>> >> > function? I
>> >> >> > would like to know if when runnin

[gem5-users] Re: panic: KVM: Failed to set register (0x6030000000100042) value

2022-11-03 Thread Giacomo Travaglini via gem5-users

Hello, it was a bug which got fixed by the following patches, which are merged 
in develop and will be part of next release

https://gem5-review.googlesource.com/c/public/gem5/+/64072/4
https://gem5-review.googlesource.com/c/public/gem5/+/64073/4

Let me know if it works

Kind Regards

Giacomo

From: Xiongfei Liao (廖雄飛) via gem5-users 
Date: Thursday, 3 November 2022 at 11:19
To: gem5-users@gem5.org 
Cc: Xiongfei Liao (廖雄飛) 
Subject: [gem5-users] panic: KVM: Failed to set register (0x603000100042) 
value
Hi,

We try to run a full-system simulation using ARMV8KvmCPU. The simulation cannot 
get started due to the below failure of setting register PSTATE.

-
… …
  0: system.kvm_vm: Mapping 8 memory region(s)
  0: system.kvm_vm: Mapping region: 0x0xaebcb000 -> 0x0 [size: 
0x400]
  0: system.kvm_vm: Mapping region: 0x0xbb027000 -> 0x400 [size: 
0x4]
  0: system.kvm_vm: Mapping region: 0x0xacbcb000 -> 0x600 [size: 
0x200]
  0: system.kvm_vm: Mapping region: 0x0xa8bcb000 -> 0x800 [size: 
0x400]
  0: system.kvm_vm: Mapping region: 0x0xa4bcb000 -> 0xc00 [size: 
0x400]
  0: system.kvm_vm: Mapping region: 0x0xa2bcb000 -> 0x1800 [size: 
0x200]
  0: system.kvm_vm: Mapping region: 0x0xbc1b4000 -> 0x2e00 [size: 
0x8000]
  0: system.kvm_vm: Mapping region: 0x0x22bcb000 -> 0x8000 [size: 
0x8000]
build/ARM/cpu/kvm/base.cc:150: info: KVM: Coalesced MMIO disabled by config.
  0: system.littleCluster.cpus:   MPIDR(EL1) := 0x8000
build/ARM/dev/arm/energy_ctrl.cc:252: warn: Existing EnergyCtrl, but no enabled 
DVFSHandler found.
build/ARM/sim/simulate.cc:194: info: Entering event queue @ 0.  Starting 
simulation...
  0: system.littleCluster.cpus: Attaching cycle counter...
  0: system.littleCluster.cpus: In updateKvmState():
  0: system.littleCluster.cpus:   PSTATE := 0x3cd
build/ARM/cpu/kvm/base.cc:863: panic: KVM: Failed to set register 
(0x603000100042) value (errno: 22)
Memory Usage: 2693544 KBytes
Program aborted at tick 0
… …
---

This register 0x603000100042 is legal and 64-bit based on the document at 
the link: https://www.kernel.org/doc/Documentation/virtual/kvm/api.txt

What could be the reason for this? ARM CPU or software or anything else?

Any tips/suggestions are appreciated.

Thanks in advance.

All the best,
Xiongfei Liao

===

The environment settings are as below.
Host:
ARM server: Ampere eMag 2019
OS & Kernel: Ubuntu 20.04.5 LTS (GNU/Linux 5.4.0-131-generic aarch64)

Simulator:
gem5: cloned on Oct 27, 2022
bootloader: gem5 binaries 20220707/binaries/boot.arm64
kernel: gem5 binaries 20220707/binaries/vmlinux.arm64
disk: gem5 binaries ubuntu-18.04-arm64-docker.img


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[gem5-users] panic: KVM: Failed to set register (0x6030000000100042) value

2022-11-03 Thread 廖雄飛

Hi,

We try to run a full-system simulation using ARMV8KvmCPU. The simulation cannot 
get started due to the below failure of setting register PSTATE.

-
… …
  0: system.kvm_vm: Mapping 8 memory region(s)
  0: system.kvm_vm: Mapping region: 0x0xaebcb000 -> 0x0 [size: 
0x400]
  0: system.kvm_vm: Mapping region: 0x0xbb027000 -> 0x400 [size: 
0x4]
  0: system.kvm_vm: Mapping region: 0x0xacbcb000 -> 0x600 [size: 
0x200]
  0: system.kvm_vm: Mapping region: 0x0xa8bcb000 -> 0x800 [size: 
0x400]
  0: system.kvm_vm: Mapping region: 0x0xa4bcb000 -> 0xc00 [size: 
0x400]
  0: system.kvm_vm: Mapping region: 0x0xa2bcb000 -> 0x1800 [size: 
0x200]
  0: system.kvm_vm: Mapping region: 0x0xbc1b4000 -> 0x2e00 [size: 
0x8000]
  0: system.kvm_vm: Mapping region: 0x0x22bcb000 -> 0x8000 [size: 
0x8000]
build/ARM/cpu/kvm/base.cc:150: info: KVM: Coalesced MMIO disabled by config.
  0: system.littleCluster.cpus:   MPIDR(EL1) := 0x8000
build/ARM/dev/arm/energy_ctrl.cc:252: warn: Existing EnergyCtrl, but no enabled 
DVFSHandler found.
build/ARM/sim/simulate.cc:194: info: Entering event queue @ 0.  Starting 
simulation...
  0: system.littleCluster.cpus: Attaching cycle counter...
  0: system.littleCluster.cpus: In updateKvmState():
  0: system.littleCluster.cpus:   PSTATE := 0x3cd
build/ARM/cpu/kvm/base.cc:863: panic: KVM: Failed to set register 
(0x603000100042) value (errno: 22)
Memory Usage: 2693544 KBytes
Program aborted at tick 0
… …
---

This register 0x603000100042 is legal and 64-bit based on the document at 
the link: https://www.kernel.org/doc/Documentation/virtual/kvm/api.txt

What could be the reason for this? ARM CPU or software or anything else?

Any tips/suggestions are appreciated.

Thanks in advance.

All the best,
Xiongfei Liao

===

The environment settings are as below.
Host:
ARM server: Ampere eMag 2019
OS & Kernel: Ubuntu 20.04.5 LTS (GNU/Linux 5.4.0-131-generic aarch64)

Simulator:
gem5: cloned on Oct 27, 2022
bootloader: gem5 binaries 20220707/binaries/boot.arm64
kernel: gem5 binaries 20220707/binaries/vmlinux.arm64
disk: gem5 binaries ubuntu-18.04-arm64-docker.img

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[gem5-users] Re: panic: KVM: Failed to set register (0x6030000000100042) value

[gem5-users] Re: HPCG on RISCV

[gem5-users] Re: panic: KVM: Failed to set register (0x6030000000100042) value

[gem5-users] panic: KVM: Failed to set register (0x6030000000100042) value

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