> Not sure this is a great idea. First of all, the poll stats are per hardware > queue. How many submission queues and CPUs do you have in your setup? For 31 hq, 64 cpus (so actually just 31 sq)- but the test I ran was: taskset -c 1 fio --name=global --gtod_reduce=1 --filename=/dev/nvme0n1 --bs=4k --rw=read --ioengine=sync --iodepth=1 --numjobs=1 --direct=1 --name=job I was a bit surprised at the delta I saw, but it may have been coincidental > most cases, I'd assume there'd be a 1:1 mapping between the two, which makes > the stats essentially free. And secondly, even for a less optimal mapping, > the poll stats are a lot cheaper than the io stats. So bundling them > together might not make a ton of sense. Fair enough :) -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
