== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:23:57 (1787865837)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.4525 s, 7.8 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-ffff8edc8804d000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.357828
Iter 1/10: OSS cache speed: 0.356658
Iter 1/10: ladvise speed: 0.318774
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.336998
Iter 2/10: OSS cache speed: 0.331757
Iter 2/10: ladvise speed: 0.329672
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.345242
Iter 3/10: OSS cache speed: 0.353192
Iter 3/10: ladvise speed: 0.342138
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.366439
Iter 4/10: OSS cache speed: 0.282526
Iter 4/10: ladvise speed: 0.357048
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.357107
Iter 5/10: OSS cache speed: 0.380635
Iter 5/10: ladvise speed: 0.291411
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.349587
Iter 6/10: OSS cache speed: 0.347385
Iter 6/10: ladvise speed: 0.368155
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.408278
Iter 7/10: OSS cache speed: 0.320133
Iter 7/10: ladvise speed: 0.367514
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.332993
Iter 8/10: OSS cache speed: 0.350172
Iter 8/10: ladvise speed: 0.362222
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.289603
Iter 9/10: OSS cache speed: 0.319598
Iter 9/10: ladvise speed: 0.33152
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.308748
Iter 10/10: OSS cache speed: 0.310585
Iter 10/10: ladvise speed: 0.267644
Average uncached read: .34
Average speedup with OSS cached read:  .33 = +-2%
Average speedup with ladvise willread:  .33 = +-2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0