> I think q0 is the "administrative" queue, and the other 8 are ordinary > queues. (Sorry, I read that somewhere, but can't remember where). >
Good to know. > > > .... but on your system i'd say there should be some queues on other > > interrupts to they can be serviced by other cores, so that doesnt look > > right. > > It wasn't right. > > > Do you have MSI enabled? Bus options -> PCI Support -> Message Signaled > > Interrupts (MSI and MSI-X) > > I didn't have MSI enabled, but do now. I now get 5 queues (nvmeq[0-4]) > on four interrups, and the interrupts are spread over the four cores > (I've got a 4 core Athlon). > > > If your system is not too old you may get more interrupts or a better > > spread with that enabled. > > Yes, that is the case. From a "warm start", I was able to copy my 1.4GB > file in 2.76s. This is a bit more like it! > Nice! > > > You look like you're getting SATA speeds, but since you have the nvme > > device, i guess that implies you havent fallen back to SATA. > > I don't think the SSD has a SATA interface. > That was a guess on my behalf - i know that M2 disks can come in SATA or NVMe, but I dont know if NVMe drives can fallback to SATA. > > > Could well be older hardware or less PCIe slots/lanes. > > My $ hdparm -tT /dev/nvme0n1 speeds haven't improved since enabling MSI > in the kernel. > Ah well, its only a simple synthetic benchmark. Adam
