== sanity test 248c: verify whole file read behavior ===== 09:02:05 (1787749325)
llite.lustre-ffff90a211fa8000.read_ahead_stats=c
striped dir -i0 -c2 -H all_char  /mnt/lustre/d248c.sanity
llite.lustre-ffff90a211fa8000.max_read_ahead_whole_mb=64
whole file readahead of 64 MiB took 7.97652 seconds
llite.lustre-ffff90a211fa8000.read_ahead_stats=
snapshot_time                       1787749336.133796780 secs.nsecs
start_time                          1787749327.408632445 secs.nsecs
elapsed_time                        8.725164335 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-ffff90a211fa8000.read_ahead_stats=clear
llite.lustre-ffff90a211fa8000.max_read_ahead_whole_mb=8
non-whole file readahead of 64 MiB took 5.19405 seconds
llite.lustre-ffff90a211fa8000.read_ahead_stats=
snapshot_time                       1787749343.613916460 secs.nsecs
start_time                          1787749336.156542098 secs.nsecs
elapsed_time                        7.457374362 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: 7.97652, greater than non: 5.19405
llite.lustre-ffff90a211fa8000.max_read_ahead_whole_mb=64
whole file readahead of 64 MiB took 4.56606 seconds
llite.lustre-ffff90a211fa8000.read_ahead_stats=
snapshot_time                       1787749349.221721025 secs.nsecs
start_time                          1787749336.156542098 secs.nsecs
elapsed_time                        13.065178927 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-ffff90a211fa8000.read_ahead_stats=clear
llite.lustre-ffff90a211fa8000.max_read_ahead_whole_mb=8
non-whole file readahead of 64 MiB took 5.57475 seconds
llite.lustre-ffff90a211fa8000.read_ahead_stats=
snapshot_time                       1787749356.557099672 secs.nsecs
start_time                          1787749349.244199587 secs.nsecs
elapsed_time                        7.312900085 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-ffff90a211fa8000.max_read_ahead_whole_mb=4