eoc/eoc-rs/crates/eoc-meter/src/lib.rs

@@ -3401,6 +3401,18 @@ mod macos_ioreport {
                     // inside it. One value here is therefore no evidence of a sampler that
                     // does not sample, and asserting it was a rise the probe must also see
                     // failed once in ~300 CI runs on an otherwise green tree.
+                    //
+                    // Nothing is lost by not asserting it here: that the sampler re-reads
+                    // is already pinned deterministically, per sample, by the scripted
+                    // probes -- `probe_with_a_single_batch_jump_is_frozen` drives
+                    // `GPU Energy` to a different value at every sample and asserts each
+                    // one is what the rule was handed, as does
+                    // `probe_with_one_die_live_and_one_frozen_is_frozen`. A sampler that
+                    // cached one reading fails those on sample 1, on every host. So do
+                    // not restore a hardware assertion here believing this is uncovered:
+                    // no rail on the CI host reliably moves inside the probe's window
+                    // (its CPU rails are frozen), so there is no sound hardware witness
+                    // to assert on.
                     lines.push(if values.len() >= 2 {
                         format!("{}: moved {lo} -> {hi}, the probe read {} distinct values within it", key.0, values.len())
                     } else {