== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:50:22 (1787856622)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.7653 s, 8.2 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-ffff945b10a36800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.490723
Iter 1/10: OSS cache speed: 0.482897
Iter 1/10: ladvise speed: 0.457039
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.421714
Iter 2/10: OSS cache speed: 0.506884
Iter 2/10: ladvise speed: 0.428855
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.411651
Iter 3/10: OSS cache speed: 0.459995
Iter 3/10: ladvise speed: 0.452517
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.388715
Iter 4/10: OSS cache speed: 0.409717
Iter 4/10: ladvise speed: 0.425025
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.415611
Iter 5/10: OSS cache speed: 0.45832
Iter 5/10: ladvise speed: 0.433537
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.376206
Iter 6/10: OSS cache speed: 0.35163
Iter 6/10: ladvise speed: 0.438391
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.368851
Iter 7/10: OSS cache speed: 0.383902
Iter 7/10: ladvise speed: 0.425816
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.433099
Iter 8/10: OSS cache speed: 0.3721
Iter 8/10: ladvise speed: 0.47533
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.384355
Iter 9/10: OSS cache speed: 0.430923
Iter 9/10: ladvise speed: 0.534
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.483687
Iter 10/10: OSS cache speed: 0.529177
Iter 10/10: ladvise speed: 0.490395
Average uncached read: .41
Average speedup with OSS cached read:  .43 = +4%
Average speedup with ladvise willread:  .45 = +9%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0