Re: vhost-kernel net on pasta: from 26 to 37Gbit/s

11 Jun 2025

      On Wed, 11 Jun 2025 09:04:57 +0200
Eugenio Perez Martin  wrote:
...
On Tue, Jun 10, 2025 at 5:29 PM Stefano Brivio  wrote:
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On Mon, 9 Jun 2025 11:59:21 +0200
Eugenio Perez Martin  wrote:
...
Getting a table like [1] would give us light about this, especially if
it is just a matter of running "make performance" or similar. Maybe we
need to include longer queues? Focus on a given scenario? UDP goes
better but TCP?
Well, it's a matter of running ./run under tests (or 'make' there).
Have you tried that with your patch? It's kind of representative in the
sense that it uses several message sizes and different values for the
sending window.
Yes but it freezes in my env.
Copying the different windows, top-left:
# tail -f --retry /home/passt/test/test_logs/context_unshare.log
/home/passt/test/test_logs/context_ns.log
tail: warning: --retry only effective for the initial open
==> /home/passt/test/test_logs/context_unshare.log <==  
unshare$ tail: cannot open '/home/passt/test/test_logs/context_ns.log'
for reading: No such file or directory
[...]
=== build/cppcheck
...skipped.
=== build/clang_tidy
...skipped.
---
I guess you're missing some dependencies, nstool ('make assets', or
'make' under tests/), or similar.

There's a test/README.md file listing most dependencies and also
describing how to debug things, essentially:

  DEBUG=1 ./run

and have a look at script.log. Patches for whatever issue you
might be hitting in your setup are warmly welcome, of course. :)

-- 
Stefano