[gem5-users] Re: IGbE / Intel 8254x - NIC support on Gem5?

[Νικόλαος Ταμπουρατζής]

We have not synchronize the COSSIM code in official gem5 release because it 
requires HLA libriries. 

> 11 Μαΐ 2022, 11:13 μμ, ο χρήστης «Νικόλαος Ταμπουρατζής 
> » έγραψε:
> 
> Dear Raghu,
> 
> The steps which I sent you is for dual gem5 (not for cgem5). In this 
> scenario, two gem5s is connected through Etherlink (virtual dummy link) 
> without switches etc. Also in this scenario both two gem5s is working in one 
> thread (for this reason does not need synchronization). So you do not need 
> the COSSIM and cgem5. You only need download the latest official gem5 and 
> patch it using my previous steps to add the NIC.
> 
> COSSIM uses OMNET++ and it is much more complex as you can see in the paper.
> 
> Best regards,
> Nikolaos Tampouratzis
> 
> 
>> 11 Μαΐ 2022, 11:02 μμ, ο χρήστης «rshank...@austin.rr.com» έγραψε:
>> 
>> Nikolaos.
>> A related question - Are the 2 code streams of cgem5 & gem5 - kept 
>> consistent to each other?  So users can benefit from updates on either 
>> stream (I'm not sure how that works today). If one switches to cgem5 stream 
>> do we lose improvements happening on gem5 stream?
>> 
>> Also, thanks for your research work, community share of COSSIM gem5, and 
>> paper below (which I had a copy from before )
>> 
>> Raghu
>> 
>> -Original Message-
>> From: rshank...@austin.rr.com  
>> Sent: Wednesday, May 11, 2022 12:58 PM
>> To: 'The gem5 Users mailing list' 
>> Subject: [gem5-users] Re: IGbE / Intel 8254x - NIC support on Gem5?
>> 
>> Thanks very much Nikolaos for the detailed step-by-step response. This is 
>> highly appreciated.  I'll try and get back 
>> 
>> Raghu 
>> 
>> -Original Message-
>> From: Νικόλαος Ταμπουρατζής 
>> Sent: Wednesday, May 11, 2022 12:10 PM
>> To: The gem5 Users mailing list 
>> Subject: [gem5-users] Re: IGbE / Intel 8254x - NIC support on Gem5?
>> 
>> Dear rshankar,
>> 
>> As I know, the NIC in gem5 is worked only with Full System (FS) mode in 
>> order to load the correct drivers etc. You can add the following in order to 
>> add the NIC in FS mode:
>> 
>> https://github.com/H2020-COSSIM/cgem5/blob/main/src/dev/x86/SouthBridge.py
>> (see the lines with #COSSIM)
>> https://github.com/H2020-COSSIM/cgem5/blob/main/configs/common/FSConfig.py
>> (lines 636, 674-676)
>> 
>> Build the gem5.
>> 
>> You need download the vmlinux-5.4.49 kernel from here:  
>> https://github.com/gem5/gem5-resources/tree/stable/src/linux-kernel
>> 
>> You need download the x86-ubuntu.img image from here:  
>> http://dist.gem5.org/dist/v21-2/images/x86/ubuntu-18-04/x86-ubuntu.img.gz
>> 
>> Mount the x86-ubuntu.img and add the gem5_init.sh in /root using:
>> 
>> sudo mount -o loop,offset=1048576 x86-ubuntu.img /mnt cd /mnt sudo mount 
>> --bind /proc /mnt/proc sudo mount --bind /dev /mnt/dev sudo chroot .
>> cd root
>> nano gem5_init.sh #Add the following script:
>> 
>> #!/bin/bash
>> 
>> # Copyright (c) 2021 The University of Texas at Austin.
>> # SPDX-License-Identifier: BSD 3-Clause
>> 
>> echo "Starting gem5 init... reading run script file."
>> if ! m5 readfile > /tmp/script; then
>>echo "Failed to run m5 readfile, exiting!!"
>>rm -f /tmp/script
>>if ! m5 exit; then
>># Useful for booting the disk image in (e.g.,) qemu for debugging
>>echo "m5 exit failed, dropping to shell."
>>/bin/sh
>>fi
>> else
>>echo "Running m5 script from /tmp/script !!"
>>chmod 755 /tmp/script
>>/tmp/script
>>echo "Done running script, exiting."
>>rm -f /tmp/script
>>/bin/sh
>>#m5 exit
>> fi
>> 
>> 
>> 
>> exit
>> # now we are back to the host system
>> cd
>> sudo umount /mnt/proc
>> sudo umount /mnt/dev
>> sudo umount /mnt
>> 
>> 
>> Now, you may use this cmd to start the FS execution:
>> 
>> /home/cossim/COSSIM/cgem5/build/X86/gem5.fast --listener-mode=on 
>> /home/cossim/COSSIM/cgem5/configs/example/fs.py
>> --kernel=vmlinux-5.4.49 --disk-image=x86-ubuntu.img --dual
>> 
>> The 1st terminal is in 3456 port (telnet 127.0.0.1 3456) The 2nd terminal is 
>> in 3457 port (telnet 127.0.0.1 3457)
>> 
>> After boot, you need add the localhost and IP in both terminals (eg.  
>> ifconfig lo 127.0.0.1 & ifconfig eth0 10.0.1.x), where x 2 and 3). You can 
>> use "ping -c 1 10.0.1.x" to check the functionality.
>> 
>> If you use the above steps in your work, refer to the following COSSIM 
>> paper, please: https://dl.acm.org/doi/10.1145/3378934
>> 
>> If someone has configured the NIC with SE mode, please give us details! :)
>> 
>> Best regards,
>> Nikolaos Tampouratzis
>> 
>> 
>> 
>> Quoting rshank...@austin.rr.com:
>> 
>>> Hello,
>>> 
>>> 
>>> 
>>> I'd like to add a NIC to simple Gem5 model derived from two_level.py 
>>> running in SE mode, x86 CPU.
>>> 
>>> Is this supported in Gem5?
>>> 
>>> 
>>> 
>>> Per COSSIM version of gem5 (aka cgem5) states below.  I'd like to stay 
>>> on
>>> Gem5 - so any guidance here is appreciated.
>>> 
>>> 
>>> 
>>> GitHub - H2020-COSSIM/cgem5: Modified GEM5 March 2022 release 
>>> 

[gem5-users] Re: IGbE / Intel 8254x - NIC support on Gem5?

[Νικόλαος Ταμπουρατζής]

Dear Raghu,

The steps which I sent you is for dual gem5 (not for cgem5). In this scenario, 
two gem5s is connected through Etherlink (virtual dummy link) without switches 
etc. Also in this scenario both two gem5s is working in one thread (for this 
reason does not need synchronization). So you do not need the COSSIM and cgem5. 
You only need download the latest official gem5 and patch it using my previous 
steps to add the NIC.

COSSIM uses OMNET++ and it is much more complex as you can see in the paper.

Best regards,
Nikolaos Tampouratzis


> 11 Μαΐ 2022, 11:02 μμ, ο χρήστης «rshank...@austin.rr.com» έγραψε:
> 
> Nikolaos.
> A related question - Are the 2 code streams of cgem5 & gem5 - kept consistent 
> to each other?  So users can benefit from updates on either stream (I'm not 
> sure how that works today). If one switches to cgem5 stream do we lose 
> improvements happening on gem5 stream?
> 
> Also, thanks for your research work, community share of COSSIM gem5, and 
> paper below (which I had a copy from before )
> 
> Raghu
> 
> -Original Message-
> From: rshank...@austin.rr.com  
> Sent: Wednesday, May 11, 2022 12:58 PM
> To: 'The gem5 Users mailing list' 
> Subject: [gem5-users] Re: IGbE / Intel 8254x - NIC support on Gem5?
> 
> Thanks very much Nikolaos for the detailed step-by-step response. This is 
> highly appreciated.  I'll try and get back 
> 
> Raghu 
> 
> -Original Message-
> From: Νικόλαος Ταμπουρατζής 
> Sent: Wednesday, May 11, 2022 12:10 PM
> To: The gem5 Users mailing list 
> Subject: [gem5-users] Re: IGbE / Intel 8254x - NIC support on Gem5?
> 
> Dear rshankar,
> 
> As I know, the NIC in gem5 is worked only with Full System (FS) mode in order 
> to load the correct drivers etc. You can add the following in order to add 
> the NIC in FS mode:
> 
> https://github.com/H2020-COSSIM/cgem5/blob/main/src/dev/x86/SouthBridge.py
> (see the lines with #COSSIM)
> https://github.com/H2020-COSSIM/cgem5/blob/main/configs/common/FSConfig.py
> (lines 636, 674-676)
> 
> Build the gem5.
> 
> You need download the vmlinux-5.4.49 kernel from here:  
> https://github.com/gem5/gem5-resources/tree/stable/src/linux-kernel
> 
> You need download the x86-ubuntu.img image from here:  
> http://dist.gem5.org/dist/v21-2/images/x86/ubuntu-18-04/x86-ubuntu.img.gz
> 
> Mount the x86-ubuntu.img and add the gem5_init.sh in /root using:
> 
> sudo mount -o loop,offset=1048576 x86-ubuntu.img /mnt cd /mnt sudo mount 
> --bind /proc /mnt/proc sudo mount --bind /dev /mnt/dev sudo chroot .
> cd root
> nano gem5_init.sh #Add the following script:
> 
> #!/bin/bash
> 
> # Copyright (c) 2021 The University of Texas at Austin.
> # SPDX-License-Identifier: BSD 3-Clause
> 
> echo "Starting gem5 init... reading run script file."
> if ! m5 readfile > /tmp/script; then
> echo "Failed to run m5 readfile, exiting!!"
> rm -f /tmp/script
> if ! m5 exit; then
> # Useful for booting the disk image in (e.g.,) qemu for debugging
> echo "m5 exit failed, dropping to shell."
> /bin/sh
> fi
> else
> echo "Running m5 script from /tmp/script !!"
> chmod 755 /tmp/script
> /tmp/script
> echo "Done running script, exiting."
> rm -f /tmp/script
> /bin/sh
> #m5 exit
> fi
> 
> 
> 
> exit
> # now we are back to the host system
> cd
> sudo umount /mnt/proc
> sudo umount /mnt/dev
> sudo umount /mnt
> 
> 
> Now, you may use this cmd to start the FS execution:
> 
> /home/cossim/COSSIM/cgem5/build/X86/gem5.fast --listener-mode=on 
> /home/cossim/COSSIM/cgem5/configs/example/fs.py
> --kernel=vmlinux-5.4.49 --disk-image=x86-ubuntu.img --dual
> 
> The 1st terminal is in 3456 port (telnet 127.0.0.1 3456) The 2nd terminal is 
> in 3457 port (telnet 127.0.0.1 3457)
> 
> After boot, you need add the localhost and IP in both terminals (eg.  
> ifconfig lo 127.0.0.1 & ifconfig eth0 10.0.1.x), where x 2 and 3). You can 
> use "ping -c 1 10.0.1.x" to check the functionality.
> 
> If you use the above steps in your work, refer to the following COSSIM paper, 
> please: https://dl.acm.org/doi/10.1145/3378934
> 
> If someone has configured the NIC with SE mode, please give us details! :)
> 
> Best regards,
> Nikolaos Tampouratzis
> 
> 
> 
> Quoting rshank...@austin.rr.com:
> 
>> Hello,
>> 
>> 
>> 
>> I'd like to add a NIC to simple Gem5 model derived from two_level.py 
>> running in SE mode, x86 CPU.
>> 
>> Is this supported in Gem5?
>> 
>> 
>> 
>> Per COSSIM version of gem5 (aka cgem5) states below.  I'd like to stay 
>> on
>> Gem5 - so any guidance here is appreciated.
>> 
>> 
>> 
>> GitHub - H2020-COSSIM/cgem5: Modified GEM5 March 2022 release 
>> 
>> 
>> 
>> 
>> In GEM5's publicly available repositories, the only network interface 
>> card implemented, tested and verified is the Intel 8254x based gigabit 
>> Ethernet adapter. It is provided as a PCI GEM5 network device using 
>> the e1000 Linux driver.
>> 
>> However, the latest version of GEM5 

[gem5-users] Re: IGbE / Intel 8254x - NIC support on Gem5?

[rshankar2]

Nikolaos.
A related question - Are the 2 code streams of cgem5 & gem5 - kept consistent 
to each other?  So users can benefit from updates on either stream (I'm not 
sure how that works today). If one switches to cgem5 stream do we lose 
improvements happening on gem5 stream?

Also, thanks for your research work, community share of COSSIM gem5, and paper 
below (which I had a copy from before )

Raghu

-Original Message-
From: rshank...@austin.rr.com  
Sent: Wednesday, May 11, 2022 12:58 PM
To: 'The gem5 Users mailing list' 
Subject: [gem5-users] Re: IGbE / Intel 8254x - NIC support on Gem5?

Thanks very much Nikolaos for the detailed step-by-step response. This is 
highly appreciated.  I'll try and get back 

Raghu 

-Original Message-
From: Νικόλαος Ταμπουρατζής 
Sent: Wednesday, May 11, 2022 12:10 PM
To: The gem5 Users mailing list 
Subject: [gem5-users] Re: IGbE / Intel 8254x - NIC support on Gem5?

Dear rshankar,

As I know, the NIC in gem5 is worked only with Full System (FS) mode in order 
to load the correct drivers etc. You can add the following in order to add the 
NIC in FS mode:

https://github.com/H2020-COSSIM/cgem5/blob/main/src/dev/x86/SouthBridge.py
(see the lines with #COSSIM)
https://github.com/H2020-COSSIM/cgem5/blob/main/configs/common/FSConfig.py
(lines 636, 674-676)

Build the gem5.

You need download the vmlinux-5.4.49 kernel from here:  
https://github.com/gem5/gem5-resources/tree/stable/src/linux-kernel

You need download the x86-ubuntu.img image from here:  
http://dist.gem5.org/dist/v21-2/images/x86/ubuntu-18-04/x86-ubuntu.img.gz

Mount the x86-ubuntu.img and add the gem5_init.sh in /root using:

sudo mount -o loop,offset=1048576 x86-ubuntu.img /mnt cd /mnt sudo mount --bind 
/proc /mnt/proc sudo mount --bind /dev /mnt/dev sudo chroot .
cd root
nano gem5_init.sh #Add the following script:

#!/bin/bash

# Copyright (c) 2021 The University of Texas at Austin.
# SPDX-License-Identifier: BSD 3-Clause

echo "Starting gem5 init... reading run script file."
if ! m5 readfile > /tmp/script; then
 echo "Failed to run m5 readfile, exiting!!"
 rm -f /tmp/script
 if ! m5 exit; then
 # Useful for booting the disk image in (e.g.,) qemu for debugging
 echo "m5 exit failed, dropping to shell."
 /bin/sh
 fi
else
 echo "Running m5 script from /tmp/script !!"
 chmod 755 /tmp/script
 /tmp/script
 echo "Done running script, exiting."
 rm -f /tmp/script
 /bin/sh
 #m5 exit
fi



exit
# now we are back to the host system
cd
sudo umount /mnt/proc
sudo umount /mnt/dev
sudo umount /mnt


Now, you may use this cmd to start the FS execution:

/home/cossim/COSSIM/cgem5/build/X86/gem5.fast --listener-mode=on 
/home/cossim/COSSIM/cgem5/configs/example/fs.py
--kernel=vmlinux-5.4.49 --disk-image=x86-ubuntu.img --dual

The 1st terminal is in 3456 port (telnet 127.0.0.1 3456) The 2nd terminal is in 
3457 port (telnet 127.0.0.1 3457)

After boot, you need add the localhost and IP in both terminals (eg.  
ifconfig lo 127.0.0.1 & ifconfig eth0 10.0.1.x), where x 2 and 3). You can use 
"ping -c 1 10.0.1.x" to check the functionality.

If you use the above steps in your work, refer to the following COSSIM paper, 
please: https://dl.acm.org/doi/10.1145/3378934

If someone has configured the NIC with SE mode, please give us details! :)

Best regards,
Nikolaos Tampouratzis



Quoting rshank...@austin.rr.com:

> Hello,
>
>
>
> I'd like to add a NIC to simple Gem5 model derived from two_level.py 
> running in SE mode, x86 CPU.
>
> Is this supported in Gem5?
>
>
>
> Per COSSIM version of gem5 (aka cgem5) states below.  I'd like to stay 
> on
> Gem5 - so any guidance here is appreciated.
>
>
>
> GitHub - H2020-COSSIM/cgem5: Modified GEM5 March 2022 release 
> 
>
>
>
> In GEM5's publicly available repositories, the only network interface 
> card implemented, tested and verified is the Intel 8254x based gigabit 
> Ethernet adapter. It is provided as a PCI GEM5 network device using 
> the e1000 Linux driver.
>
> However, the latest version of GEM5 supports this real-network device 
> only on ARM-based architectures. In the scope of COSSIM, GEM5 has been 
> recently modified so as to support the Intel 8254x network card for 
> the x86 ISA


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[gem5-users] Re: IGbE / Intel 8254x - NIC support on Gem5?

[rshankar2]

Thanks very much Nikolaos for the detailed step-by-step response. This is
highly appreciated.  I'll try and get back 

Raghu 

-Original Message-
From: Νικόλαος Ταμπουρατζής  
Sent: Wednesday, May 11, 2022 12:10 PM
To: The gem5 Users mailing list 
Subject: [gem5-users] Re: IGbE / Intel 8254x - NIC support on Gem5?

Dear rshankar,

As I know, the NIC in gem5 is worked only with Full System (FS) mode in
order to load the correct drivers etc. You can add the following in order to
add the NIC in FS mode:

https://github.com/H2020-COSSIM/cgem5/blob/main/src/dev/x86/SouthBridge.py
(see the lines with #COSSIM)
https://github.com/H2020-COSSIM/cgem5/blob/main/configs/common/FSConfig.py
(lines 636, 674-676)

Build the gem5.

You need download the vmlinux-5.4.49 kernel from here:  
https://github.com/gem5/gem5-resources/tree/stable/src/linux-kernel

You need download the x86-ubuntu.img image from here:  
http://dist.gem5.org/dist/v21-2/images/x86/ubuntu-18-04/x86-ubuntu.img.gz

Mount the x86-ubuntu.img and add the gem5_init.sh in /root using:

sudo mount -o loop,offset=1048576 x86-ubuntu.img /mnt cd /mnt sudo mount
--bind /proc /mnt/proc sudo mount --bind /dev /mnt/dev sudo chroot .
cd root
nano gem5_init.sh #Add the following script:

#!/bin/bash

# Copyright (c) 2021 The University of Texas at Austin.
# SPDX-License-Identifier: BSD 3-Clause

echo "Starting gem5 init... reading run script file."
if ! m5 readfile > /tmp/script; then
 echo "Failed to run m5 readfile, exiting!!"
 rm -f /tmp/script
 if ! m5 exit; then
 # Useful for booting the disk image in (e.g.,) qemu for debugging
 echo "m5 exit failed, dropping to shell."
 /bin/sh
 fi
else
 echo "Running m5 script from /tmp/script !!"
 chmod 755 /tmp/script
 /tmp/script
 echo "Done running script, exiting."
 rm -f /tmp/script
 /bin/sh
 #m5 exit
fi



exit
# now we are back to the host system
cd
sudo umount /mnt/proc
sudo umount /mnt/dev
sudo umount /mnt


Now, you may use this cmd to start the FS execution:

/home/cossim/COSSIM/cgem5/build/X86/gem5.fast --listener-mode=on
/home/cossim/COSSIM/cgem5/configs/example/fs.py
--kernel=vmlinux-5.4.49 --disk-image=x86-ubuntu.img --dual

The 1st terminal is in 3456 port (telnet 127.0.0.1 3456) The 2nd terminal is
in 3457 port (telnet 127.0.0.1 3457)

After boot, you need add the localhost and IP in both terminals (eg.  
ifconfig lo 127.0.0.1 & ifconfig eth0 10.0.1.x), where x 2 and 3). You can
use "ping -c 1 10.0.1.x" to check the functionality.

If you use the above steps in your work, refer to the following COSSIM
paper, please: https://dl.acm.org/doi/10.1145/3378934

If someone has configured the NIC with SE mode, please give us details! :)

Best regards,
Nikolaos Tampouratzis



Quoting rshank...@austin.rr.com:

> Hello,
>
>
>
> I'd like to add a NIC to simple Gem5 model derived from two_level.py 
> running in SE mode, x86 CPU.
>
> Is this supported in Gem5?
>
>
>
> Per COSSIM version of gem5 (aka cgem5) states below.  I'd like to stay 
> on
> Gem5 - so any guidance here is appreciated.
>
>
>
> GitHub - H2020-COSSIM/cgem5: Modified GEM5 March 2022 release 
> 
>
>
>
> In GEM5's publicly available repositories, the only network interface 
> card implemented, tested and verified is the Intel 8254x based gigabit 
> Ethernet adapter. It is provided as a PCI GEM5 network device using 
> the e1000 Linux driver.
>
> However, the latest version of GEM5 supports this real-network device 
> only on ARM-based architectures. In the scope of COSSIM, GEM5 has been 
> recently modified so as to support the Intel 8254x network card for 
> the x86 ISA


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to gem5-users-le...@gem5.org
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[gem5-users] Re: IGbE / Intel 8254x - NIC support on Gem5?

[Νικόλαος Ταμπουρατζής]

Dear rshankar,

As I know, the NIC in gem5 is worked only with Full System (FS) mode  
in order to load the correct drivers etc. You can add the following in  
order to add the NIC in FS mode:


https://github.com/H2020-COSSIM/cgem5/blob/main/src/dev/x86/SouthBridge.py  
(see the lines with #COSSIM)
https://github.com/H2020-COSSIM/cgem5/blob/main/configs/common/FSConfig.py  
(lines 636, 674-676)


Build the gem5.

You need download the vmlinux-5.4.49 kernel from here:  
https://github.com/gem5/gem5-resources/tree/stable/src/linux-kernel


You need download the x86-ubuntu.img image from here:  
http://dist.gem5.org/dist/v21-2/images/x86/ubuntu-18-04/x86-ubuntu.img.gz


Mount the x86-ubuntu.img and add the gem5_init.sh in /root using:

sudo mount -o loop,offset=1048576 x86-ubuntu.img /mnt
cd /mnt
sudo mount --bind /proc /mnt/proc
sudo mount --bind /dev /mnt/dev
sudo chroot .
cd root
nano gem5_init.sh #Add the following script:

#!/bin/bash

# Copyright (c) 2021 The University of Texas at Austin.
# SPDX-License-Identifier: BSD 3-Clause

echo "Starting gem5 init... reading run script file."
if ! m5 readfile > /tmp/script; then
echo "Failed to run m5 readfile, exiting!!"
rm -f /tmp/script
if ! m5 exit; then
# Useful for booting the disk image in (e.g.,) qemu for debugging
echo "m5 exit failed, dropping to shell."
/bin/sh
fi
else
echo "Running m5 script from /tmp/script !!"
chmod 755 /tmp/script
/tmp/script
echo "Done running script, exiting."
rm -f /tmp/script
/bin/sh
#m5 exit
fi



exit
# now we are back to the host system
cd
sudo umount /mnt/proc
sudo umount /mnt/dev
sudo umount /mnt


Now, you may use this cmd to start the FS execution:

/home/cossim/COSSIM/cgem5/build/X86/gem5.fast --listener-mode=on  
/home/cossim/COSSIM/cgem5/configs/example/fs.py  
--kernel=vmlinux-5.4.49 --disk-image=x86-ubuntu.img --dual


The 1st terminal is in 3456 port (telnet 127.0.0.1 3456)
The 2nd terminal is in 3457 port (telnet 127.0.0.1 3457)

After boot, you need add the localhost and IP in both terminals (eg.  
ifconfig lo 127.0.0.1 & ifconfig eth0 10.0.1.x), where x 2 and 3). You  
can use "ping -c 1 10.0.1.x" to check the functionality.


If you use the above steps in your work, refer to the following COSSIM  
paper, please: https://dl.acm.org/doi/10.1145/3378934


If someone has configured the NIC with SE mode, please give us details! :)

Best regards,
Nikolaos Tampouratzis



Quoting rshank...@austin.rr.com:


Hello,



I'd like to add a NIC to simple Gem5 model derived from two_level.py running
in SE mode, x86 CPU.

Is this supported in Gem5?



Per COSSIM version of gem5 (aka cgem5) states below.  I'd like to stay on
Gem5 - so any guidance here is appreciated.



GitHub - H2020-COSSIM/cgem5: Modified GEM5 March 2022 release




In GEM5's publicly available repositories, the only network interface card
implemented, tested and verified is the Intel 8254x based gigabit Ethernet
adapter. It is provided as a PCI GEM5 network device using the e1000 Linux
driver.

However, the latest version of GEM5 supports this real-network device only
on ARM-based architectures. In the scope of COSSIM, GEM5 has been recently
modified so as to support the Intel 8254x network card for the x86 ISA



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[gem5-users] Different latencies

[Inderjit singh]

1. What is the difference between data/tag/response latency?
2. How can I add write latency (for NVM caches) in gem5, any patch?


Inderjit Singh
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[gem5-users] Page table fault when accessing virtual address 0x7ffffffe00

[siva sankar]

Hi All,

I am trying to run a basic program of memcpy for which I am seeing the
following error.

"build/ARM/sim/faults.cc:104: panic: panic condition !handled &&
!tc->getSystemPtr()->trapToGdb(SIGSEGV, tc->contextId()) occurred: Page
table fault when accessing virtual address 0x7ffe00"

Below is the program that was cross compiled (I used -static flag when
compiling):








*void memCpy(void *d, void *s, size_t n){char *csrc = (char *)s;
char *cdest = (char *)d;for(int i=0; i___
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