On Mon, Oct 15, 2018 at 02:31:45PM -0400, Vladislav Zolotarov wrote: > Christoph, hi! > I'd like to ask you if there is a way to learn from the user space the > current CPU queue mapping of a particular blk-mq device? root@testvm:~# cat /sys/block/nvme0n1/mq/?/cpu_list 0 1 2 3 > For instance, given a particular NVMe device queue (e.g. nvme0q8) how can I > tell which CPU it is mapped to? > > I need this in order to properly set the SMP affinity of the corresponding > IRQ vectors in case when kernel doesn't auto-tune it. For any somewhat modern kernel the affinity will be set up properly. If you are on an old distro kernel file a bug with them that they backport this support..
