== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:22:04 (1787145724)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 16.993 s, 6.2 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-ffff91ff91219800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.352785
Iter 1/10: OSS cache speed: 0.435598
Iter 1/10: ladvise speed: 0.320289
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.370486
Iter 2/10: OSS cache speed: 0.379661
Iter 2/10: ladvise speed: 0.376932
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.349656
Iter 3/10: OSS cache speed: 0.388643
Iter 3/10: ladvise speed: 0.363497
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.371708
Iter 4/10: OSS cache speed: 0.407482
Iter 4/10: ladvise speed: 0.376424
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.304076
Iter 5/10: OSS cache speed: 0.379624
Iter 5/10: ladvise speed: 0.380545
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.35924
Iter 6/10: OSS cache speed: 0.343802
Iter 6/10: ladvise speed: 0.408197
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.334616
Iter 7/10: OSS cache speed: 0.38949
Iter 7/10: ladvise speed: 0.327712
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.36897
Iter 8/10: OSS cache speed: 0.371015
Iter 8/10: ladvise speed: 0.383292
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.250605
Iter 9/10: OSS cache speed: 0.414323
Iter 9/10: ladvise speed: 0.463066
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.420055
Iter 10/10: OSS cache speed: 0.321781
Iter 10/10: ladvise speed: 0.361706
Average uncached read: .34
Average speedup with OSS cached read:  .38 = +11%
Average speedup with ladvise willread:  .37 = +8%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0