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cloud-hypervisor/performance-metrics
Anatol Belski b2430d701b performance-metrics: Add QCOW2 copy-on-write write micro benchmark
Add micro_bench_qcow_cow_write which writes clusters into a QCOW2
overlay backed by a raw file.  Each write triggers copy-on-write:
cluster allocation, L2 and refcount table updates, then the data
write.  This measures COW allocation overhead compared to writing
into a plain empty image.

Workloads: 128 and 256 clusters.
Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>
2026-04-16 17:27:38 +00:00
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