== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:35:22 (1789382122)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.0884 s, 8.7 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-ffff92a4c6756000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.324822
Iter 1/10: OSS cache speed: 0.380651
Iter 1/10: ladvise speed: 0.322037
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.298887
Iter 2/10: OSS cache speed: 0.359283
Iter 2/10: ladvise speed: 0.339498
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.337622
Iter 3/10: OSS cache speed: 0.346197
Iter 3/10: ladvise speed: 0.373646
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.262598
Iter 4/10: OSS cache speed: 0.286734
Iter 4/10: ladvise speed: 0.32897
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.363813
Iter 5/10: OSS cache speed: 0.331416
Iter 5/10: ladvise speed: 0.339411
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.342769
Iter 6/10: OSS cache speed: 0.349131
Iter 6/10: ladvise speed: 0.313045
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.303737
Iter 7/10: OSS cache speed: 0.277345
Iter 7/10: ladvise speed: 0.343787
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.352484
Iter 8/10: OSS cache speed: 0.322395
Iter 8/10: ladvise speed: 0.361863
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.370756
Iter 9/10: OSS cache speed: 0.344123
Iter 9/10: ladvise speed: 0.328909
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.322148
Iter 10/10: OSS cache speed: 0.346684
Iter 10/10: ladvise speed: 0.345102
Average uncached read: .32
Average speedup with OSS cached read:  .33 = +3%
Average speedup with ladvise willread:  .33 = +3%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0