Le 08/09/2021 à 19:11, Erwan Velu a écrit :
[..]
Enabling 32 poll queues:
[...]
2 devices, 2 thread nostats : taskset -c 0,1 t/io_uring -b512 -d128
-c32 -s32 -p1 -F1 -B1 -n2 /dev/nvme2n1 /dev/nvme3n1 : 1.84M
Just realized something here, i'm using 2 devices with 2 cores for a
good 1.84M, but cores 0 and 1 are not on the same physical core.
But I could also use 2 logical cores but this time located on the same
physical core.
Thanks to the good Zen2 hyper-threading, this should give me nice numbers.
So I made a try !
2 devices on a single physical core brings me up to 1.23M (that's 67% of
the previous result on two physical cores)
3 devices on a two physical cores bring me up to 1.85M
4 devices on a two physical cores bring me up to 2.48M
4 devices on a three physical cores bring me up to 3.77M
That's really great numbers ...
