I am getting this error when I run bazel build -c opt fifo_per_cpu_agent about ghost-userspace HOT 5 CLOSED

Hi @aghari19 , this seems to be related to another issue #3. Could you:

1. make sure you are in ghOSt kernel (uname -a)
2. run make headers_install INSTALL_HDR_PATH=/usr in the ghost-kernel's directory
3. check whether you see the declaration for enum bpf_stats_type in /usr/src/linux-headers-VERSION/include/uapi/linux/bpf.h? Replace VERSION in the path with the ghOSt kernel version (5.11 or so).

from ghost-userspace.

Hello @dohyunkim-dev
Thank you for your pointers. I rebuilt the system and ran the make command and was able to successfully build the user-space.

However, soon after I run into the following issue when I run the following command:
bazel-bin/fifo_per_cpu_agent --ghost_cpus 0-1

from ghost-userspace.

Hello,

It appears that you may not have the ghOSt kernel installed, or if you do, then perhaps CONFIG_SCHED_CLASS_GHOST was not set.

To check if the ghOSt kernel was installed with ghOSt enabled, can you let me know if you see the ghost directory under /sys/fs?

Thanks,
Jack

from ghost-userspace.

Hello Jack,
Yes, I think the ghost kernel was not installed or if it did it was not proper. I do not see the ghost directory under /sys/fs and when I looked for the CONFIG_SCHED_CLASS_GHOST in the .config file it was not set.
I see this in the config file.

While configuring the kernel do you recommend doing 'make menuconfig' and enabling the ghost class or doing 'make defconfig'.

I have been doing defconfig all this while. Please let me know,

Thank you,
Haritha

from ghost-userspace.

Hi aghari19, sorry for the delayed response. As long as you can get the setting that works, you can use either menuconfig or defconfig. I personally use ./scripts/config --enable CONFIG_SCHED_CLASS_GHOST before doing make to make sure ghOSt is properly configured for compilation. Marking this thread as closed, but feel free to reopen and follow up if you have any further questions.

from ghost-userspace.