Hi Oliver, On Fri, Mar 03 2023, Michal Sojka wrote: >>> On Wed, Mar 01 2023, Oliver Hartkopp wrote: >>>> I can not see problems or drops when using >>>> >>>> ./isotpsend vcan0 -s 123 -d 321 -D 9 -li >>>> >>>> as data producer where I added a counter: >>> >>> Really? >> >> Yes ;-) > > You're right. I have just forgotten that I added the poll patch to my > default kernel. Thanks for testing. It seems I was just lucky in the morning. Now, I can reproduce the packet loss again even without my patch. And my student Jakub (Cc) too, but with kernel 5.15. On Thu, Mar 02 2023, Oliver Hartkopp wrote: > Hm. Everything fine here with 6.2.0-12944-ge492250d5252. I tried the exact same commit. When the system running the test is mostly idle, I have to wait many minutes to loose the packet. But when I run the test simultaneously with Linux kernel compilation on all CPUs (make -j$(nproc)), the packet is lost almost immediately. I'm still testing with: - receiver: ./isotp-poll-test -s 321 -d 123 -i -a -b -q - sender: ./isotp-poll-test -s 123 -d 321 -o -w -b -Michal
