== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:53:12 (1790880792)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.93412 s, 17.7 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff9e66c5416800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.13003
Iter 1/10: OSS cache speed: 2.24022
Iter 1/10: ladvise speed: 1.95018
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.88001
Iter 2/10: OSS cache speed: 2.05385
Iter 2/10: ladvise speed: 2.11037
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.08267
Iter 3/10: OSS cache speed: 2.15523
Iter 3/10: ladvise speed: 2.16654
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.15523
Iter 4/10: OSS cache speed: 2.25186
Iter 4/10: ladvise speed: 2.16542
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.0818
Iter 5/10: OSS cache speed: 0.67274
Iter 5/10: ladvise speed: 0.741119
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.665897
Iter 6/10: OSS cache speed: 0.63554
Iter 6/10: ladvise speed: 0.657681
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.714572
Iter 7/10: OSS cache speed: 0.888882
Iter 7/10: ladvise speed: 0.961247
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.852075
Iter 8/10: OSS cache speed: 0.849274
Iter 8/10: ladvise speed: 0.972577
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.971837
Iter 9/10: OSS cache speed: 1.10065
Iter 9/10: ladvise speed: 0.972477
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.18361
Iter 10/10: OSS cache speed: 1.41303
Iter 10/10: ladvise speed: 1.47958
Average uncached read: 1.47
Average speedup with OSS cached read:  1.42 = +-3%
Average speedup with ladvise willread:  1.41 = +-4%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0