[PATCH] eal/linux: enhanced error handling for affinity

[Stephen Hemminger]

On Thu, 25 Apr 2024 13:40:21 +0800 (CST)
吴剑跃 <wujianyue000 at 163.com> wrote:

> After reviewing the code, I believe that the combination of the __linux__ and _GNU_SOURCE macros effectively confirms whether the pthread_getname_np() API can be utilized. I will proceed with adding them. Thank you~
> #if defined(__linux__) && defined(_GNU_SOURCE)
> 
> 
> 在 2024-04-25 09:08:59，"吴剑跃" <wujianyue000 at 163.com> 写道：
> 
> Hello, Stephen,
> 
> 
> 
> Good day
> The issue is not caused by DPDK itself, but arises when the DPDK worker process attempts to set affinity to a cpuset that exceeds the limits set by the cgroup cpuset settings.
> Original error prints are:
>      PANIC in rte_eal_init():
>      Cannot set affinity
>      # Callstacks.
> 
> 
> Finding the detailed reason for the failure was challenging, so I added extra print statements to help diagnose the issue.
> I understand your concern about maintaining OS independence with the rte_thread functions. This change aims to provide more context when errors occur, facilitating quicker troubleshooting. I agree that this introduces more code and could be seen as platform-specific. Perhaps we could implement this conditionally, only for platforms where such detailed logging is supported and useful.
> 

My point is that just giving the kernel error should be sufficient, rather than having
to reformat the incoming arguments. The arguments are coming from the command line, and what I
would do is look at the error and the command line arguments to the application, as well as
any kernel logs.