burette: add virtio-fs perf test with parallel I/O benchmarks#3450
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benhillis wants to merge 1 commit into
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burette: add virtio-fs perf test with parallel I/O benchmarks#3450benhillis wants to merge 1 commit into
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Pull request overview
Adds a new burette warm-mode performance benchmark that measures virtio-fs throughput/IOPS from inside a minimal Linux VM using fio (including a parallel random I/O workload intended to exercise multi-queue virtio-fs).
Changes:
- Introduces
VirtioFsTest(WarmPerfTest) that boots once, mounts a host-backed virtio-fs share, and runs fio sequential/random workloads (plus parallel random withnumjobs=4) while emittingfio_virtiofs_*metrics. - Wires the new test into the
buretteCLI (--test virtio-fs) and adds--virtiofs-file-size-mibto control the file size used for the fio jobs. - Registers the new test module and includes its artifact registration in
package.
Reviewed changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.
| File | Description |
|---|---|
petri/burette/src/tests/virtio_fs.rs |
New virtio-fs fio perf test implementation + metric parsing. |
petri/burette/src/tests/mod.rs |
Exposes the new virtio_fs test module. |
petri/burette/src/main.rs |
Adds CLI plumbing for the new test and file-size flag; includes it in run/package flows. |
damanm24
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May 11, 2026
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damanm24
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May 11, 2026
Add a burette performance test for virtio-fs that measures sequential and random I/O throughput using fio with io_uring. Includes both single-thread and parallel (numjobs=4) random I/O tests to exercise multi-queue behavior. Metrics collected: - Sequential read/write bandwidth (128k blocks) - Random read/write IOPS and bandwidth (4k blocks) - Parallel random read/write IOPS and bandwidth (4k blocks, 4 jobs) Also extracts common helpers (build_firmware, require_petritools_erofs) into a shared module to reduce duplication across disk_io, network, and virtio_fs tests. Adds sync before dropping page caches for more deterministic results, and moves cache invalidation before the perf recorder to avoid capturing non-fio activity in traces. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Add a burette performance test for virtio-fs that measures sequential and random I/O throughput using fio with io_uring.
What it does
Runs fio against a virtio-fs mount with the following workloads:
Each workload uses io_uring with iodepth=32 and drops the page cache before each run to ensure we measure the FUSE path, not the guest page cache.
Metrics
fio_virtiofs_seq_read_bwfio_virtiofs_seq_write_bwfio_virtiofs_rand_read_bwfio_virtiofs_rand_read_iopsfio_virtiofs_rand_write_bwfio_virtiofs_rand_write_iopsfio_virtiofs_rand_read_par4_bwfio_virtiofs_rand_read_par4_iopsfio_virtiofs_rand_write_par4_bwfio_virtiofs_rand_write_par4_iops