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performance-metrics: Add async QCOW2 overlay tempfile helper

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Add qcow_async_overlay_tempfile which creates a QCOW2 overlay
backed by a RAW file and opens it via QcowDiskAsync. Mirrors
the existing qcow_overlay_tempfile for io_uring benchmarks.

Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>
This commit is contained in:
Anatol Belski
2026-03-27 11:40:22 +01:00
committed by Rob Bradford
parent 2041ba5a91
commit c8fee5953f
1 changed files with 8 additions and 0 deletions
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8
performance-metrics/src/util.rs
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@@ -196,6 +196,14 @@ pub fn qcow_overlay_tempfile(num_clusters: usize) -> (TempFile, TempFile, QcowDi
(backing, overlay, disk)
}
/// QCOW2 overlay with raw backing opened via QcowDiskAsync.
pub fn qcow_async_overlay_tempfile(num_clusters: usize) -> (TempFile, TempFile, QcowDiskAsync) {
let (backing, overlay) = create_overlay_tempfiles(num_clusters);
let disk = QcowDiskAsync::new(overlay.as_file().try_clone().unwrap(), false, true, true)
.expect("failed to open overlay qcow2 via QcowDiskAsync");
(backing, overlay, disk)
}
/// Create a zlib compressed QCOW2 image with `num_clusters` clusters
/// via `qemu-img convert -c`.
fn create_compressed_qcow_tempfile(num_clusters: usize) -> TempFile {