[v3,3/3] scripts/simplebench: add unaligned data case to bench_write_req

Commit Message

Andrey Shinkevich July 12, 2020, 5:17 p.m. UTC

Add a test case with writhing data unaligned to the image clusters.
This case does not involve the COW optimization introduced with the
patch "qcow2: skip writing zero buffers to empty COW areas"
(git commit ID: c8bb23cbdbe32f5).

Signed-off-by: Andrey Shinkevich <[e-mail]>
---
 scripts/simplebench/bench_write_req.py | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

Patch

diff --git a/scripts/simplebench/bench_write_req.py b/scripts/simplebench/bench_write_req.py
index ceb0ab6..9f3a520 100755
--- a/scripts/simplebench/bench_write_req.py
+++ b/scripts/simplebench/bench_write_req.py
@@ -58,7 +58,7 @@  def bench_write_req(qemu_img, image_name, block_size, block_offset, requests,
     image_name   -- QCOW2 image name to create
     block_size   -- size of a block to write to clusters
     block_offset -- offset of the block in clusters
-    requests     -- number of write requests per cluster
+    requests     -- number of write requests per cluster, customize if zero
     empty_image  -- if not True, fills image with random data
 
     Returns {'seconds': int} on success and {'error': str} on failure.
@@ -176,6 +176,13 @@  if __name__ == '__main__':
             'requests': 2,
             'empty_image': True
         },
+        {
+            'id': '<unaligned>',
+            'block_size': 104857600,
+            'block_offset': 524288,
+            'requests': 0,
+            'empty_image': False
+        },
     ]
 
     # Test-envs are "columns" in benchmark resulting table, 'id is a caption