top(1) computes compressed ARC ratio incorrectly
The compressed ARC port: https://github.com/OpenIndiana/oi-userland/pull/5231/files.
ARC: 8758M Total, 5160M MRU, 3038M MFU, 7717K Anon, 280M Header, 203M Other 7188M Compressed, 9429M Uncompressed, 1.08:1 Ratio, 1017M Overhead
9,429 / 7,188 = 1.31, though the ratio is displayed as
htop(1) with compressed ARC stats shows