== sanity test 248c: verify whole file read behavior ===== 11:11:15 (1787584275)
llite.lustre-ffff88a320a68000.read_ahead_stats=c
striped dir -i0 -c2 -H all_char  /mnt/lustre/d248c.sanity
llite.lustre-ffff88a320a68000.max_read_ahead_whole_mb=64
whole file readahead of 64 MiB took 6.78492 seconds
llite.lustre-ffff88a320a68000.read_ahead_stats=
snapshot_time                       1787584285.325318903 secs.nsecs
start_time                          1787584277.759684423 secs.nsecs
elapsed_time                        7.565634480 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-ffff88a320a68000.read_ahead_stats=clear
llite.lustre-ffff88a320a68000.max_read_ahead_whole_mb=8
non-whole file readahead of 64 MiB took 4.47867 seconds
llite.lustre-ffff88a320a68000.read_ahead_stats=
snapshot_time                       1787584291.446678562 secs.nsecs
start_time                          1787584285.367426155 secs.nsecs
elapsed_time                        6.079252407 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: 6.78492, greater than non: 4.47867
llite.lustre-ffff88a320a68000.max_read_ahead_whole_mb=64
whole file readahead of 64 MiB took 5.70324 seconds
llite.lustre-ffff88a320a68000.read_ahead_stats=
snapshot_time                       1787584298.211594855 secs.nsecs
start_time                          1787584285.367426155 secs.nsecs
elapsed_time                        12.844168700 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-ffff88a320a68000.read_ahead_stats=clear
llite.lustre-ffff88a320a68000.max_read_ahead_whole_mb=8
non-whole file readahead of 64 MiB took 9.21333 seconds
llite.lustre-ffff88a320a68000.read_ahead_stats=
snapshot_time                       1787584311.737966478 secs.nsecs
start_time                          1787584298.235098147 secs.nsecs
elapsed_time                        13.502868331 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-ffff88a320a68000.max_read_ahead_whole_mb=4