== sanity test 248c: verify whole file read behavior ===== 19:19:42 (1789687182)
llite.lustre-ffff961fca027000.read_ahead_stats=c
striped dir -i0 -c2 -H all_char  /mnt/lustre/d248c.sanity
llite.lustre-ffff961fca027000.max_read_ahead_whole_mb=64
whole file readahead of 64 MiB took 8.99139 seconds
llite.lustre-ffff961fca027000.read_ahead_stats=
snapshot_time                       1789687195.100634031 secs.nsecs
start_time                          1789687185.209537031 secs.nsecs
elapsed_time                        9.891097000 secs.nsecs
hits                                16382 samples [pages]
misses                              2 samples [pages]
zero_size_window                    1 samples [pages]
failed_to_fast_read                 3 samples [pages]
readahead_pages                     1 samples [pages] 16382 16382 16382
llite.lustre-ffff961fca027000.read_ahead_stats=clear
llite.lustre-ffff961fca027000.max_read_ahead_whole_mb=8
non-whole file readahead of 64 MiB took 5.45347 seconds
llite.lustre-ffff961fca027000.read_ahead_stats=
snapshot_time                       1789687203.997690980 secs.nsecs
start_time                          1789687195.159632950 secs.nsecs
elapsed_time                        8.838058030 secs.nsecs
hits                                16382 samples [pages]
misses                              2 samples [pages]
zero_size_window                    1 samples [pages]
failed_to_fast_read                 3 samples [pages]
readahead_pages                     1 samples [pages] 16382 16382 16382
Try 0 failed: whole file readahead took: 8.99139, greater than non: 5.45347
llite.lustre-ffff961fca027000.max_read_ahead_whole_mb=64
whole file readahead of 64 MiB took 10.7979 seconds
llite.lustre-ffff961fca027000.read_ahead_stats=
snapshot_time                       1789687217.419064559 secs.nsecs
start_time                          1789687195.159632950 secs.nsecs
elapsed_time                        22.259431609 secs.nsecs
hits                                32764 samples [pages]
misses                              4 samples [pages]
zero_size_window                    2 samples [pages]
failed_to_fast_read                 6 samples [pages]
readahead_pages                     2 samples [pages] 16382 16382 32764
llite.lustre-ffff961fca027000.read_ahead_stats=clear
llite.lustre-ffff961fca027000.max_read_ahead_whole_mb=8
non-whole file readahead of 64 MiB took 8.52695 seconds
llite.lustre-ffff961fca027000.read_ahead_stats=
snapshot_time                       1789687229.153047617 secs.nsecs
start_time                          1789687217.440569223 secs.nsecs
elapsed_time                        11.712478394 secs.nsecs
hits                                16382 samples [pages]
misses                              2 samples [pages]
zero_size_window                    1 samples [pages]
failed_to_fast_read                 3 samples [pages]
readahead_pages                     1 samples [pages] 16382 16382 16382
Test passed on attempt 1
llite.lustre-ffff961fca027000.max_read_ahead_whole_mb=4