I’ve been trying to test how my SFU cluster behaves under a specific scenario: 100+ clients connect to the same router 1 Client turns on 1080p video+audio In my experience, 1 router (1 worker) cannot handle that many clients at once. To deal with this scenario, I added code to poll worker load an…

Indeed you may be reaching the CPU limit for a single worker.

Could you please elaborate? The issue I’m running into is that, counter-intuitively, the CPU is not being fully utilized. I expected it to be, but that just doesn’t seem to be the case. I can confirm that iotop shows barely any disk/swap usage, so that’s not it. The server is in the cloud, and uplo…

From what I understand, you run multiple Chrome clients on one instance. It might be that your client CPU is overloaded. Have you checked it?

I’m confident that’s not the case. As mentioned, when running only ~13 clients (8+5 tabs), all tabs received video at ~25fps

How do you check your CPU usage on the server side?

There’s another comment where I posted code to compute CPU usage on the SFU backend. This load value as well as top report that CPU usage is well below 90% when a worker has 100+ clients to handle, as described in the original post.

I was able to get some data from perf. Keep in mind that this only profiles the CPU as it runs… I’m not sure we’d see non-CPU bottlenecks in report. 13.14% mediasoup-worke mediasoup-worker [.] AES_encrypt …

I believe what @footniko has said about your CPU on the client side might be true. I have witnessed this myself when I keep adding tabs each tab creates a decoder for the incoming stream and if the CPU gets overloaded the frame rate drops. So if 13 is a good number I would suggest opening another 13…

Unable to explain mediasoup-worker behavior - unexpectedly low CPU utilization

mediasoup libraries

TheSalarKhan (Muhammad Salar Khan) October 28, 2020, 1:46pm 13

Also do have a look at the awesome numbers posted here: Experience with Mediasoup

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Unable to explain mediasoup-worker behavior - unexpectedly low CPU utilization

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