changelog: add news fragment for PR #12965

jopemachine · claude · jopemachine · commit 9901d433e765 · 2026-07-20T11:04:30.000+09:00
Co-Authored-By: Claude Opus 4.8 (1M context) &lt;noreply@anthropic.com&gt;
diff --git a/changes/12965.fix.md b/changes/12965.fix.md
@@ -0,0 +1 @@
+Fix user/project/domain usage buckets being inflated by the number of concurrently running kernels — the fair share aggregator accumulated resource amounts and slice durations separately and multiplied them afterwards, yielding a cross product instead of the sum of per-slice products, so four concurrent GPU kernels reported 4x their real fGPU-seconds. Existing buckets are rebuilt from the unaffected `kernel_usage_records`.

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	+Fix user/project/domain usage buckets being inflated by the number of concurrently running kernels — the fair share aggregator accumulated resource amounts and slice durations separately and multiplied them afterwards, yielding a cross product instead of the sum of per-slice products, so four concurrent GPU kernels reported 4x their real fGPU-seconds. Existing buckets are rebuilt from the unaffected `kernel_usage_records`.