== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:37:04 (1746157024)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 4.5507 s, 23.0 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-ffff8800aa864000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.839348
Iter 1/10: OSS cache speed: 1.12808
Iter 1/10: ladvise speed: 1.04605
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.947871
Iter 2/10: OSS cache speed: 0.980049
Iter 2/10: ladvise speed: 1.08197
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.829954
Iter 3/10: OSS cache speed: 0.95134
Iter 3/10: ladvise speed: 0.942806
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.818336
Iter 4/10: OSS cache speed: 0.939205
Iter 4/10: ladvise speed: 1.12021
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.895003
Iter 5/10: OSS cache speed: 0.861511
Iter 5/10: ladvise speed: 1.12505
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.888905
Iter 6/10: OSS cache speed: 0.967385
Iter 6/10: ladvise speed: 0.973665
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.869056
Iter 7/10: OSS cache speed: 0.896717
Iter 7/10: ladvise speed: 0.968783
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.804969
Iter 8/10: OSS cache speed: 0.990491
Iter 8/10: ladvise speed: 1.01612
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.813645
Iter 9/10: OSS cache speed: 0.980335
Iter 9/10: ladvise speed: 0.964346
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.993192
Iter 10/10: OSS cache speed: 1.14975
Iter 10/10: ladvise speed: 1.3614
Average uncached read: .87
Average speedup with OSS cached read:  .98 = +12%
Average speedup with ladvise willread:  1.06 = +21%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0