advance!
best,
Da Zhang
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gem5 supports AVX, I am
wondering that what was happened? (Additional info: almost every vectorized
loop in NPB, gfortran/gcc also print "loop turned into non-loop; it never
loops" after the vectorization, does anyone have some hints about this?)
Thanks in advance.
r guidance.
One difference I do notice is that the arm disk image I created use
/dev/vda, but both the arm image downloaded from gem5 website or our x86
disk image use /dev/sda. So, I wonder if this is the problem? Or, something
else is wrong?
Thanks in advance.
best,
Da Zhang
_
n the system
with AtomicSimpleCPU, it show similar terminal output without "Illegal
instruction"). I am new to ARM and get more troubles when I tried to create
an ARM disk image with qemu.
Thanks a lot in advance.
best,
Da Zhang
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system. But
with either lscpu or cat /proc/cpuinfo, it only shows one cpu. Any clue or
suggestions?
Thanks in advance.
Best,
Da ZHang
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ge_gem5_Friendly
>
>
>
> -Tony
>
>
>
> *From:* gem5-users *On Behalf Of *Da Zhang
> *Sent:* Thursday, July 19, 2018 12:00 PM
> *To:* gem5 users mailing list
> *Subject:* Re: [gem5-users] dacapo (java) benchmark suite encounters
> "SIGSEGV" and "n
n't tried to take a checkpoint with COW layer disabled and then
> restart from that checkpoint before. All I have done is "ctrl+c" to stop
> gem5 to take the checkpoint (--checkpoint-at-end); I rely on gem5 to take
> care of all things that need to be checked when taking checkp
ore. All I have done is "ctrl+c" to stop
gem5 to take the checkpoint (--checkpoint-at-end); I rely on gem5 to take
care of all things that need to be checked when taking checkpoints.
Best,
Da Zhang
On Thu, Jul 19, 2018 at 2:36 PM Gutierrez, Anthony <
anthony.gutier...@amd.com>
ing while
> doing some XML serializing/deserializing, perhaps the xml file it is
> looking for is gone?
>
>
>
> Beyond that, assuming it is a real bug in gem5, I would recommend an
> ExecAll trace to figure out why the instruction at that PC is faulting.
>
>
>
> -Tony
>
&g
ause the problem? Any clues or
suggestions to debug these problems?
best,
Da Zhang
On Mon, Jul 16, 2018 at 1:32 PM Jason Lowe-Power
wrote:
> Hello,
>
> Are you seeing any warnings like "warn: Instruction XXX not implemented"?
>
> There are many X86 SIMD instructions th
uot;
On Mon, Jul 16, 2018 at 11:39 AM Da Zhang wrote:
> Hey guys,
>
> I am testing a java benchmark suite, dacapo, on gem5 with fs mode.
> Unfortunately, I encounter a lot of SIGSEGV and null exceptions during
> timing mode after restarting from the checkpoints.
> I am using
nt.
Does anyone have suggestions or experience against these issues?
best,
Da Zhang
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9, 2018 at 4:02 PM, Da Zhang wrote:
>
>> Hey guys,
>>
>> I am trying to add floating point multiplications (so do floating point
>> dividing and comparing) to the benchmarks as instruments so that I can use
>> the number of floating point multiplications as a counte
Hey guys,
I am trying to add floating point multiplications (so do floating point
dividing and comparing) to the benchmarks as instruments so that I can use
the number of floating point multiplications as a counter for the
benchmarks during simulation. I see there is FloatMult next to FloatAdd, so
Hey, guys
I have been using kvm cpu to take checkpoints for a while. I use the
default setting for running kvm cpu and modified setting (e.g., caches
latencies) when running real simulation. So far, everything looks fine.
I just wonder if the configurations matter when I take checkpoints? In
other
h more reuse.
>
> Cheers,
> Jason
>
> On Thu, May 24, 2018 at 9:11 AM Da Zhang wrote:
>
>> I am using FS mode.
>>
>> On Thu, May 24, 2018 at 12:00 PM, Jason Lowe-Power
>> wrote:
>>
>>> Hi Da,
>>>
>>> Are you using SE
I am using FS mode.
On Thu, May 24, 2018 at 12:00 PM, Jason Lowe-Power
wrote:
> Hi Da,
>
> Are you using SE mode or FS mode? IIRC, the TLB size does nothing in SE
> mode (it doesn't use a TLB). The TLB is only used in FS mode.
>
> Jason
>
> On Thu, May 24, 20
More details:
The dtb read miss rate stays at 10%. Our workload is a simple sequential
linked list search microbenchmark with fixed heap size at 1MB. Cache size
is varied from 128KB to 2MB.
On Thu, May 24, 2018 at 11:44 AM, Da Zhang wrote:
> Hey guys,
>
> I tried to increase the dtb
Hey guys,
I tried to increase the dtb size (i.e., number of tlb entries) for our
research. However, the stats.txt for the different dtb size
(64,128,256,512,1024,2048,1048576) is practical identical or identical. For
size < 512, the system.switch_cpus.dtb.rdAccesses difference is only
several hund
Moreover, it seems only happening to multi-processes benchmarks since that
my other multithreading benchmarks doesn't have this issue so far.
On Fri, May 4, 2018 at 4:37 PM, Da Zhang wrote:
> Hey guys,
>
> My gem5 real simulation crashed with
> "
>
> gem5.op
only happen during real simulation, and sometimes we can
avoid it by running longer warmup in atomic mode.
best,
Da Zhang
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Hi guys,
I have some new gem5 checkpoints made kvm. However, I want to run them with
an old version of gem5 (back to 2014). I know there is an updater, but how
to downgrade a checkpoint to run it on the old gem5?
Best,
Da Zhang
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by running longer warmup in atomic mode.
best,
Da Zhang
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--fast-forward option)? So that we can avoid the long wait time
for things like initialization.
best,
Da Zhang
On Thu, Feb 15, 2018 at 12:17 PM, Jason Lowe-Power
wrote:
> Hi Da,
>
> You likely need to enable gem5's multithreaded mode to get many CPUs to
> boot correctly. I'
--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 wrote:
> Hi Jason
>
> The package works (I used the second one)! And it also works wit
86KvmCPU, --mem-size=8GB and -n 4.
best,
Da Zhang
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/+/7362
> https://gem5-review.googlesource.com/c/public/gem5/+/7361
>
> Cheers,
> Jason
>
> On Wed, Feb 7, 2018 at 8:49 PM Da Zhang 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
Hi Jason,
The batch you provided works! I was able to run linux kernel v4.8.13 with
ubuntu 16.04.1 with the latest gem5 applying the patch. Sorry that I am new
to use these patches, and didn't apply it in a correct way.
Thanks a lot.
best,
Da
On Fri, Feb 2, 2018 at 4:20 PM, Da Zhang
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: 0x8000
I am able to run linux kernel v4.8.13 and ubuntu 16.04.1 (server) image by
using an old git branch f881618. The patch generates errors when building
the simulator.
On Thu, Feb 1, 2018 at 1:37 PM, Da Zhang wrote:
> Hi Jason,
>
> I was able to pass the problem by using a very old st
Gabe
> in the review). This patch will get linux to boot. If you have the
> inclination, feel free to fix it the correct way!
>
> https://gem5-review.googlesource.com/c/public/gem5/+/7301
>
> Cheers,
> Jason
>
> On Wed, Jan 31, 2018 at 11:46 AM Da Zhang wrote:
>
>
Hi all,
I have some problem with running configs/example/fs.py with linux v4.8.13
and ubuntu image 16.04.1. I follow the steps on Jason's blog (
http://www.lowepower.com/jason/setting-up-gem5-full-system.html) to build
linux kernel binary and ubuntu image. And the booting aborted after
line "i8042
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