== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:15:36 (1775873736)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.458 s, 9.2 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-ffff9342a0264800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.353777
Iter 1/10: OSS cache speed: 0.343242
Iter 1/10: ladvise speed: 0.350427
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.327399
Iter 2/10: OSS cache speed: 0.357033
Iter 2/10: ladvise speed: 0.349321
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.358188
Iter 3/10: OSS cache speed: 0.409344
Iter 3/10: ladvise speed: 0.431589
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.42715
Iter 4/10: OSS cache speed: 0.484968
Iter 4/10: ladvise speed: 0.48927
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.461913
Iter 5/10: OSS cache speed: 0.513535
Iter 5/10: ladvise speed: 0.554253
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.664408
Iter 6/10: OSS cache speed: 0.782884
Iter 6/10: ladvise speed: 0.809261
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.889503
Iter 7/10: OSS cache speed: 0.850674
Iter 7/10: ladvise speed: 0.730112
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.753529
Iter 8/10: OSS cache speed: 0.723458
Iter 8/10: ladvise speed: 0.858536
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.853712
Iter 9/10: OSS cache speed: 0.794879
Iter 9/10: ladvise speed: 0.804431
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.827511
Iter 10/10: OSS cache speed: 0.875098
Iter 10/10: ladvise speed: 1.02215
Average uncached read: .59
Average speedup with OSS cached read:  .61 = +3%
Average speedup with ladvise willread:  .63 = +6%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0