On Wed, 2024-01-31 at 10:32 -0700, Jens Axboe wrote: > > Thanks for testing! > > Any chance that you could run some tests with and without NAPI that > help > validate that it actually works? That part is what I'm most > interested > in, not too worried about the stability of it as I have scrutinized > it > pretty close already. > There is maybe a test that I can perform. The data that I receive is timestamped. I have a small test program that checks the age of the updates on their reception... I would expect that it should be possible to perceive the busy polling effect by comparing the average update age with and without the feature enabled... A word of warning... The service that my client is connecting to has relocated recently. I used to have an RTT of about 8mSec with it to about 400-500 mSec today... because of the huge RTT, I am unsure that the test is going to be conclusive at all... However, I am also in the process of relocating my client closer to the service. If you can wait a week or so, I should able to do that test with a RTT < 1 mSec... Beside that, I could redo the same test that Stefan did with the ping client/server setup but would that test add any value to the current collective knowledge? I'll do the update age test when I restart my client and I'll report back the result but my expectations aren't very high that it is going to be conclusive due to the huge RTT.
