Add prefilling flags to diskspd metadata

PiperOrigin-RevId: 837253478

Author: Arushi-07

perfkitbenchmarker/configs/default_benchmark_config.yaml

@@ -504,6 +504,7 @@ diskspd_read_only:
     after_prepare_sleep_time: 300 # Wait after the prepare phase for prefill to complete.
     diskspd_file_size: 1000G
     diskspd_prefill_block_size: 512K
+    diskspd_fill_mode: with_fill
 
 diskspd_write_only:
   name: diskspd
@@ -522,6 +523,7 @@ diskspd_single_thread_latency:
     diskspd_block_size: 8k
     diskspd_access_pattern: r
     diskspd_prefill_block_size: 512K
+    diskspd_fill_mode: with_fill
 
 diskspd_max_iops:
   name: diskspd

perfkitbenchmarker/windows_packages/diskspd.py

@@ -358,6 +358,8 @@ def RunDiskSpd(running_vm):
   metadata['diskspd_block_size'] = FLAGS.diskspd_block_size
   metadata['diskspd_prefill_duration'] = DISKSPD_PREFILL_DURATION.value
   metadata['diskspd_prefill_block_size'] = DISKSPD_PREFILL_BLOCK_SIZE.value
+  metadata['diskspd_fill_mode'] = DISKSPD_FILL_MODE.value
+  metadata['diskspd_file_size'] = DISKSPD_FILE_SIZE.value
 
   sample_list = []
   # We can use io array or thread array for calculate max IOPs