Hello all,
I am running into issues where I am trying to create packets to perform writes
in my system that originate outside the CPU. Without knowledge of which MemCmds
do what, I naïvely declared them as WriteReqs, but there seem to be response
packets that make it back to the CPU which cause
Hi Samuel,
If you're using the classic memory system, the easiest option is to add
a tiny cache between the SimObject that issues the writes and the rest
of the memory system. Then your SimObject can issue simple WriteReqs and
the cache will take care of the rest.
Otherwise, you will have to imp
Hi,
I am interested in simulating a GPU in gem5. Just by googling I discovered a
repo from 2017 but I've also seen gem5 v21 has some files regarding to the GPU.
Could you please confirm gem5 v21 supports a GPU model? There is not much info
about it on internet. How can this GPU model be used?
M
I would like to create a system wide std::vector to be able to
perform operations on all CPUs at once. I was wondering where system.cpu
gets stored, because in System.py there is no "cpu" parameter defined, and
if I try to initialize it to capture the CPUs creating in se.py or fs.py, I
get a cycle
Hi Adrian,
gem5 has support for AMD's GCN3 (compute) GPU in SE mode, and we're working
on merging both Vega support (AMD's newer GPU ISA) and full system support.
The status of these new features can be followed on Jira.
Here's documentation on the current GPU support:
http://www.gem5.org/documen
Hi Jason,
Thanks a lot for this useful information.
Is it possible to have several CPUs + several GPUs running in parallel? I'm
using Arm as the CPU's ISA. I don't know how this GPU ISA deals with other ISAs.
Sincerely,
Adrián
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Hi Adrian,
The AMD GPU model has never been tested with Arm. I doubt the ROCm stack
will compile/work with any ISA other than x86, unfortunately.
For multi-GPU support see
http://www.gem5.org/2020/05/30/enabling-multi-gpu.html
Of course, multiple CPUs will work with no problem with or without GP
Hi Balls,
You can use SimObject::find for that purpose. You can get the name of
SimObjects from m5out/config.ini.
You could also implement a search-by-type template method that returns a vector
of matching SimObjects.
Something like:
static template
std::vector findSimObjects() {
std::vect
My bad, static goes before the return type.
Gabriel
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