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agsiddharth / CAL-DPDK-GEM5

Modifications to GEM5 for running kernel bypass networking. (DPDK)
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error while taking checkpoints #1

Open zimingH opened 5 months ago

zimingH commented 5 months ago

Hi, I encountered some issue while running the code. I have completed the buildroot part for generating the kernel and disk images, and I have built the gem5.fast and gem5.opt. I used the docker to build the kernel and disks images, and then build the gem5 outside the docker.

Following the guide in readme.md, I tried to run this line: "./l2fwd-ckp.sh --take-checkpoint --num-nics 1 --script dpdk-1.sh" (I run this project's root directory, so the actual command for me is "run-scripts/l2fwd-ckp.sh --take-checkpoint --num-nics 1 --script dpdk-1.sh"). Then I get this bus error:

... build/ARM/arch/arm/insts/pseudo.cc:173: warn: instruction 'csdb' unimplemented build/ARM/arch/arm/insts/pseudo.cc:173: warn: instruction 'bti' unimplemented Writing checkpoint build/ARM/sim/simulate.cc:107: info: Entering event queue @ 618409311000. Starting simulation... run-scripts/l2fwd-ckp-fastsim.sh: line 23: 1751325 Bus error (core dumped) "$GEM5_DIR/build/ARM/gem5.$GEM5TYPE" $DEBUG_FLAGS --outdir="$RUNDIR" "$GEM5_DIR"/configs/example/fs.py --cpu-type=$CPUTYPE --kernel="$RESOURCES/vmlinux" --disk="$RESOURCES/rootfs.ext2" --bootloader="$RESOURCES/boot.arm64" --root=/dev/sda --num-cpus=2 --mem-size=8192MB --script="$GUEST_SCRIPT_DIR/$GUEST_SCRIPT" --num-nics="$num_nics" --num-loadgens="$num_nics" --checkpoint-dir="$CKPT_DIR" $CONFIGARGS

I went further by switching the gem5.fast into gem5.opt when taking the checkpoints, and the following showed up: 0x00005555572cd5cf in gem5::Flags::isSet (mask=2, this=0x2010001000022) at build/ARM/base/flags.hh:83 83 bool isSet(Type mask) const { return (_flags & mask); }

I have checked the $GIT_ROOT and it is correctly set to my repo root dir. Not sure what caused this.

Thanks, Ziming

agsiddharth commented 5 months ago

Hi,

This could be a filesystem issue on the host system or some potential error in building the disk image.

Have you tried running using the prebuilt disk images in the repo? (Clone using git LFS) Additionally, can you let me know what system you are running this on?

zimingH commented 5 months ago

I tried using the prebuild disk image using the git LFS just now. Similar error is reported.

" Writing checkpoint build/ARM/sim/simulate.cc:107: info: Entering event queue @ 663382179000. Starting simulation... run-scripts/l2fwd-ckp.sh: line 22: 1037098 Bus error (core dumped) "$GEM5_DIR/build/ARM/gem5.$GEM5TYPE" $DEBUG_FLAGS --outdir="$RUNDIR" "$GEM5_DIR"/configs/example/fs.py --cpu-type=$CPUTYPE --kernel="$RESOURCES/vmlinux" --disk="$RESOURCES/rootfs.ext2" --bootloader="$RESOURCES/boot.arm64" --root=/dev/sda --num-cpus=2 --mem-size=8192MB --script="$GUEST_SCRIPT_DIR/$GUEST_SCRIPT" --num-nics="$num_nics" --num-loadgens="$num_nics" --checkpoint-dir="$CKPT_DIR" $CONFIGARGS "

I have attached the generated system log (the one in rundir/1NIC-ckp by default). system.txt

The Linux version is: VERSION="20.04.4 LTS (Focal Fossa)"

Tomas-mr commented 1 week ago

i got the same error when i tried to use the prebuild disk image using the git LFS as zimingH just reported.

build/ARM/sim/simulate.cc:107: info: Entering event queue @ 663382179000. Starting simulation... ./l2fwd-ckp.sh: line 22: 248644 Bus error (core dumped) "$GEM5_DIR/build/ARM/gem5.$GEM5TYPE" $DEBUG_FLAGS --outdir="$RUNDIR" "$GEM5_DIR"/configs/example/fs.py --cpu-type=$CPUTYPE --kernel="$RESOURCES/vmlinux" --disk="$RESOURCES/rootfs.ext2" --bootloader="$RESOURCES/boot.arm64" --root=/dev/sda --num-cpus=2 --mem-size=8192MB --script="$GUEST_SCRIPT_DIR/$GUEST_SCRIPT" --num-nics="$num_nics" --num-loadgens="$num_nics" --checkpoint-dir="$CKPT_DIR" $CONFIGARGS