== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:27:05 (1781213225)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 16.4476 s, 6.4 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-ffff9256c7dc2000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.296665
Iter 1/10: OSS cache speed: 0.263096
Iter 1/10: ladvise speed: 0.235967
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.27414
Iter 2/10: OSS cache speed: 0.296085
Iter 2/10: ladvise speed: 0.264605
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.24227
Iter 3/10: OSS cache speed: 0.286021
Iter 3/10: ladvise speed: 0.252331
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.260482
Iter 4/10: OSS cache speed: 0.299121
Iter 4/10: ladvise speed: 0.286269
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.346019
Iter 5/10: OSS cache speed: 0.284275
Iter 5/10: ladvise speed: 0.276953
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.241793
Iter 6/10: OSS cache speed: 0.294634
Iter 6/10: ladvise speed: 0.342025
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.327438
Iter 7/10: OSS cache speed: 0.308881
Iter 7/10: ladvise speed: 0.330205
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.337511
Iter 8/10: OSS cache speed: 0.333004
Iter 8/10: ladvise speed: 0.275016
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.283971
Iter 9/10: OSS cache speed: 0.307333
Iter 9/10: ladvise speed: 0.296064
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.298082
Iter 10/10: OSS cache speed: 0.338958
Iter 10/10: ladvise speed: 0.259791
Average uncached read: .29
Average speedup with OSS cached read:  .30 = +3%
Average speedup with ladvise willread:  .28 = +-3%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0