CPU type unknown on Ryzen 7 7840U

[silversquirl]

Running rr record /bin/echo results in the following error on my laptop:

[FATAL /home/ubuntu/rr/src/PerfCounters_x86.h:121:compute_cpu_microarch()] AMD CPU type 0x70f40 (ext family 0xa) unknown

I'm guessing rr just needs to add this CPU type to allow it to be correctly recognized.

[rocallahan]

Can you try adding it and running the rr tests? The PR would look something like d9e4547

[yalfg]

Can you try adding it and running the rr tests? The PR would look something like d9e4547

Actually the commit you pointed to solves the problem already ;) I have a 7840U laptop too and just tried the current top of tree with this commit, it works.

[silversquirl]

Seems to be working! I should've tried building from master before reporting this haha. Thanks :)