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performance-metrics: Add RAW backing file performance tests

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Add sequential and random read tests for QCOW2 overlays with
RAW backing files.

Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>
This commit is contained in:
Anatol Belski
2025-12-15 23:13:43 +01:00
committed by Rob Bradford
parent b3922dbd2c
commit 10394da0c4
2 changed files with 47 additions and 1 deletions
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16
performance-metrics/src/performance_tests.rs
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@@ -35,6 +35,8 @@ enum Error {
pub const BLK_IO_TEST_IMG: &str = "/var/tmp/ch-blk-io-test.img";
const QCOW2_BACKING_FILE: &str = "/var/tmp/ch-blk-io-test-qcow2-backing.qcow2";
pub const OVERLAY_WITH_QCOW2_BACKING: &str = "/var/tmp/ch-blk-io-test-overlay-qcow2.qcow2";
const RAW_BACKING_FILE: &str = "/var/tmp/ch-blk-io-test-raw-backing.raw";
pub const OVERLAY_WITH_RAW_BACKING: &str = "/var/tmp/ch-blk-io-test-overlay-raw.qcow2";
pub fn init_tests(overrides: &PerformanceTestOverrides) {
let mut cmd = format!("dd if=/dev/zero of={BLK_IO_TEST_IMG} bs=1M count=4096");
@@ -66,6 +68,16 @@ pub fn init_tests(overrides: &PerformanceTestOverrides) {
"qemu-img create -f qcow2 -b {QCOW2_BACKING_FILE} -F qcow2 {OVERLAY_WITH_QCOW2_BACKING} 4G"
);
assert!(exec_host_command_output(&cmd).status.success());
// RAW backing file for backing file tests
cmd = format!("dd if=/dev/zero of={RAW_BACKING_FILE} bs=1M count=4096");
assert!(exec_host_command_output(&cmd).status.success());
// QCOW2 overlay with RAW backing
cmd = format!(
"qemu-img create -f qcow2 -b {RAW_BACKING_FILE} -F raw {OVERLAY_WITH_RAW_BACKING} 4G"
);
assert!(exec_host_command_output(&cmd).status.success());
}
pub fn cleanup_tests() {
@@ -75,6 +87,10 @@ pub fn cleanup_tests() {
.unwrap_or_else(|_| panic!("Failed to remove file '{QCOW2_BACKING_FILE}'."));
fs::remove_file(OVERLAY_WITH_QCOW2_BACKING)
.unwrap_or_else(|_| panic!("Failed to remove file '{OVERLAY_WITH_QCOW2_BACKING}'."));
fs::remove_file(RAW_BACKING_FILE)
.unwrap_or_else(|_| panic!("Failed to remove file '{RAW_BACKING_FILE}'."));
fs::remove_file(OVERLAY_WITH_RAW_BACKING)
.unwrap_or_else(|_| panic!("Failed to remove file '{OVERLAY_WITH_RAW_BACKING}'."));
}
// Performance tests are expected to be executed sequentially, so we can