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| author | Martin K. Petersen <martin.petersen@oracle.com> | 2025-04-28 21:48:37 -0400 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2025-04-28 21:48:37 -0400 |
| commit | 6b08fe7763de9e388e6b224af2e39fa5083c44d8 (patch) | |
| tree | ad164e3d8991d1336927e51f82d776b9b23b41d3 /tools/perf/scripts/python/export-to-sqlite.py | |
| parent | a0d1cf505d3f3a98388c2d05fe03b126dfda3513 (diff) | |
| parent | 268975a87c7b6f6b0ceb62df236c1e1b08b89379 (diff) | |
Merge patch series "target: Remove atomics from main IO path"
Mike Christie <michael.christie@oracle.com> says:
The following patches made over Linus's tree remove the atomic use from
the main IO path. There was a handful of atomic_longs used just used
for stats and a couple atomics used for handling ordered commands. These
patches move the stats to per cpu, and moves the ordered tracking to a
per cpu counter.
With the patches 8K IOPS increases by up to 33% when running fio
with numjobs >= 4 and using the vhost-scsi target with virtio-scsi
and virtio num_queues >= 4 (jobs and queues match, and virtqueue_size
and cmd_per_lun are increased to match the total iodepth of all
jobs).
Link: https://lore.kernel.org/r/20250424032741.16216-1-michael.christie@oracle.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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