[gem5-users] Extract data accessed by DRAM

2018-05-26 Thread Riddhi Thakker
Hi all,

I want to extract data from DRAM. I tried to do that by using PacketDataPtr
and PacketPtr but I didn't get any desired result. I implemented my code in
accessAndRespond function after it calls access() of AbstractMemory class.
But when I try to directly access the data at the address using a pointer,
it gives me segmentation fault.

If anyone has any suggestions then it would be really helpful.

Thanks in advance.

Regards,
Wridhi
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[gem5-users] How to run a dynamically linked executable syscall emulation mode se.py in gem5?

2018-05-26 Thread Ciro Santilli
https://stackoverflow.com/questions/5054/how-to-run-a-dynamically-linked-executable-syscall-emulation-mode-se-py-in-gem5

After 
https://stackoverflow.com/questions/48959349/how-to-solve-fatal-kernel-too-old-when-running-gem5-in-syscall-emulation-se-m
I managed to run a statically linked hello world under certain
conditions.

But if I try to run an ARM dynamically linked one against the stdlib with:

./out/common/gem5/build/ARM/gem5.opt
./gem5/gem5/configs/example/se.py -c ./a.out

it fails with:

fatal: Unable to open dynamic executable's interpreter.

How to make it find the interpreter? Hopefully without copying my
cross' toolchain's interpreter on my host's root.

For x86_64 it works if I use my native compiler, and as expected
`strace` says that it is using the native interpreter, but it does not
work if I use a cross compiler.

The current FAQ says it is not possible to use dynamic executables:
http://gem5.org/Frequently_Asked_Questions but I don't trust it, and
then these presentations mention it:

* http://www.gem5.org/wiki/images/0/0c/2015_ws_08_dynamic-linker.pdf
* http://research.cs.wisc.edu/multifacet/papers/learning_gem5_tutorial.pdf

but not how to actually use it.

QEMU user moe has the `-L` option for that.

Tested in gem5 49f96e7b77925837aa5bc84d4c3453ab5f07408e
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[gem5-users] execution problem parsec3.0

2018-05-26 Thread commerce _com
Hi Ciro

i need to run parsec 3.0 on armv8 big.LITTLE, i added parsec 3.0 in the
image but i found this problem, do you have any idea about this problem
please?

Mount failed for selinuxfs on /sys/fs/selinux:  No such file or directory
[3.858394] init: hwclock main process (665) terminated with status 1
[4.223726] Buffer I/O error on dev vda1, logical block 524278, async
page read
[4.223917] Buffer I/O error on dev vda1, logical block 524278, async
page read
/tmp/script: line 4: cd: /home/parsec-3.0: No such file or directory
/
/tmp/script: line 7: ./env.sh: No such file or directory
/tmp/script: line 8: parsecmgmt: command not found
Connection closed by foreign host.


thanks;
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Re: [gem5-users] execution problem parsec3.0

2018-05-26 Thread Ciro Santilli
Hi commerce, I don't know what is your setup, all I can say is that I
have a few parsec benchmarks working at on my setup:
https://github.com/cirosantilli/linux-kernel-module-cheat/tree/fe01ade54d0563b5dc8d8a7826d46b153d9a850a#parsec-benchmark

You will also notice that parsecmgmt scripts are too slow to run in
gem5, you need to find the raw executable commands, which I have
documented in my repo as well.


On Sat, May 26, 2018 at 6:22 PM, commerce _com  wrote:
> Hi Ciro
>
> i need to run parsec 3.0 on armv8 big.LITTLE, i added parsec 3.0 in the
> image but i found this problem, do you have any idea about this problem
> please?
>
> Mount failed for selinuxfs on /sys/fs/selinux:  No such file or directory
> [3.858394] init: hwclock main process (665) terminated with status 1
> [4.223726] Buffer I/O error on dev vda1, logical block 524278, async
> page read
> [4.223917] Buffer I/O error on dev vda1, logical block 524278, async
> page read
> /tmp/script: line 4: cd: /home/parsec-3.0: No such file or directory
> /
> /tmp/script: line 7: ./env.sh: No such file or directory
> /tmp/script: line 8: parsecmgmt: command not found
> Connection closed by foreign host.
>
>
> thanks;
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