All x86-64 CPUs are assumed to have the RDTSCP instruction, leading to illegal instruction crash on CPUs which don't

[vurpo]

I was attempting to run Conduit on a system with an Intel Core 2 Duo E8500 (standard x86-64 PC with Fedora 32). Instead of starting up normally, the process immediately crashed with an "Illegal instruction (core dumped)" message instead of starting up normally. GDB pointed to this line in Sled where the RDTSCP x86-64 instruction is used. The CPU I used is from Q1 of 2008, which is before this instruction was added to Intel's CPUs.

[spacejam]

Interesting. This has already been disabled by default on master, but has not yet been released yet. For 0.34, you can use the no_metrics feature to disable this code.