[Linuxarm] Re: Is it ok to use debugfs to dump some ucontext-level driver-defined info?

On Tue, Dec 29, 2020 at 01:31:39PM +0000, liweihang wrote:

Hi all,

We want to dump some hns driver-defined information that belongs to a process to keep track of current memory usage. For example, there is a ucontext-level(process-level) memory pool to store WQE which is shared by a lot of QPs, we want to record and query which QPs are using this pool and how much space each QP is using.

rdmatool don't have a ucontext-level resource tracking currently, is it ok to achieve that through debugfs?

This may looks like:

$ echo 1 > <dbgfs_dir>/hns_roce/hns_0/<pid>/qp QPN Total(kB) SQ(kB) SGE(kB) RQ(kB) 110 6400 256 2048 4096 118 6400 256 2048 0

Or should it be achieved in rdmatool?

I think so, because PID != ucontext. Why can't it be presented as QP attribute? Can you please send "rdmatool" example?

Thanks

Thanks Weihang