By default Freja only records information required for performing the analysis for 64-byte cache lines when sampling an application, 64 bytes being the cache line size of all modern x86 processors. Other architectures may use other cache line sizes, though, the most common are 32 bytes or 128 bytes.

If you want to perform the analysis for a processor that uses a different cache line size than 64 bytes, you must therefore make sure to select the desired cache line size when sampling. Otherwise you will get an error message saying "no samples found" when running the analysis.