== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:00:17 (1787698817)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.5819 s, 7.2 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-ffff8a66c7ce0800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.35526
Iter 1/10: OSS cache speed: 0.311284
Iter 1/10: ladvise speed: 0.317881
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.316516
Iter 2/10: OSS cache speed: 0.359344
Iter 2/10: ladvise speed: 0.363061
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.393265
Iter 3/10: OSS cache speed: 0.380919
Iter 3/10: ladvise speed: 0.354335
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.247222
Iter 4/10: OSS cache speed: 0.315094
Iter 4/10: ladvise speed: 0.315418
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.341121
Iter 5/10: OSS cache speed: 0.362191
Iter 5/10: ladvise speed: 0.313731
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.36669
Iter 6/10: OSS cache speed: 0.306534
Iter 6/10: ladvise speed: 0.329547
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.331588
Iter 7/10: OSS cache speed: 0.362155
Iter 7/10: ladvise speed: 0.29101
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.318723
Iter 8/10: OSS cache speed: 0.341655
Iter 8/10: ladvise speed: 0.337828
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.340621
Iter 9/10: OSS cache speed: 0.378793
Iter 9/10: ladvise speed: 0.340377
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.33975
Iter 10/10: OSS cache speed: 0.331859
Iter 10/10: ladvise speed: 0.401998
Average uncached read: .33
Average speedup with OSS cached read:  .34 = +3%
Average speedup with ladvise willread:  .33 = +0%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0