I was surprised at the narrow range of the opcache hit/miss rate and related metrics for the icache

As it turns out there is an obvious explanation. The metrics were being measured as expected, but my addition to the script was always running an invalid phoronix-test-suite configuration, so I was consistently measuring an invalid run. I have now restarted the (many) runs and expect to eventually have more interesting metrics.

After updating and rerunning tests, I now see the following distributions which make a lot more sense than what I saw before…