25 Jul
2017
25 Jul
'17
6 p.m.
Hi Marcel,
On 24/07/2017 00:14, Marcel Apfelbaum wrote:
On 24/07/2017 7:53, Kinsella, Ray wrote:
Even if I am not aware of how much time would take to init a bare-metal PCIe Root Port, it seems too much.
So I repeated the testing for 64, 128, 256 and 512 ports. I ensured the configuration was sane, that 128 was twice the number of root ports and virtio-pci-net devices as 64.
I got the following results - shown in seconds, as you can see it is non linear but not exponential, there is something that is not scaling well.
64 128 256 512 PCIe Root Ports 14 72 430 2672 ACPI 4 35 342 3863 Loading Drivers 1 1 31 621 Total Boot 34 137 890 7516
( I did try to test 1024 devices, but it just dies silently )
Ray K