Performance Counters doesn't work.

[WeiyanZh]

My Environment

EDA tool and version: Verilator 4.226 and spike-cosim

Operating system: Ubuntu

Version of the Ibex source code: 2f8dfa9dfe2d938228118ed8ab6a543804d0c9ae

If I run the co-simulation, the performance counters looks like this. All counters are 0 except Cycles and Instructions Retired.

build/lowrisc_ibex_ibex_simple_system_cosim_0/sim-verilator/Vibex_simple_system --meminit=ram,examples/sw/benchmarks/coremark/coremark.elf

Performance Counters

Cycles: 4009545 NONE: 0 Instructions Retired: 2725247 LSU Busy: 0 Fetch Wait: 0 Loads: 0 Stores: 0 Jumps: 0 Conditional Branches: 0 Taken Conditional Branches: 0 Compressed Instructions: 0 Multiply Wait: 0 Divide Wait: 0

[GregAC]

The first thing to check is how did you build the simulation? You may have configured Ibex to have no performance counters, hence the results.

[WeiyanZh]

I tried * simple system * following https://github.com/lowRISC/ibex/blob/master/examples/sw/benchmarks/README.md and * co-simulation system * following https://ibex-core.readthedocs.io/en/latest/03_reference/cosim.html

[jiangnanguqi]

Hi,

I just solved this. Please check https://github.com/lowRISC/ibex/issues/1866#issuecomment-1293541290

[WeiyanZh]

It works, thank you!

[vogelpi]

Closing the issue as the question has been answered and the problem could be solved.