== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:33:59 (1786030439)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.6947 s, 7.1 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-ffff89c20341c800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.341173
Iter 1/10: OSS cache speed: 0.380651
Iter 1/10: ladvise speed: 0.481115
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.401037
Iter 2/10: OSS cache speed: 0.412832
Iter 2/10: ladvise speed: 0.433097
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.411162
Iter 3/10: OSS cache speed: 0.29481
Iter 3/10: ladvise speed: 0.361304
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.409906
Iter 4/10: OSS cache speed: 0.349749
Iter 4/10: ladvise speed: 0.405858
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.35339
Iter 5/10: OSS cache speed: 0.428256
Iter 5/10: ladvise speed: 0.309443
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.355938
Iter 6/10: OSS cache speed: 0.42748
Iter 6/10: ladvise speed: 0.373377
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.335755
Iter 7/10: OSS cache speed: 0.314371
Iter 7/10: ladvise speed: 0.38354
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.346699
Iter 8/10: OSS cache speed: 0.398874
Iter 8/10: ladvise speed: 0.414341
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.345076
Iter 9/10: OSS cache speed: 0.35449
Iter 9/10: ladvise speed: 0.324671
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.357355
Iter 10/10: OSS cache speed: 0.396324
Iter 10/10: ladvise speed: 0.376422
Average uncached read: .36
Average speedup with OSS cached read:  .37 = +2%
Average speedup with ladvise willread:  .38 = +5%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0