== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:45:12 (1775868312)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.6445 s, 8.3 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-ffff954b60f6b000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.348733
Iter 1/10: OSS cache speed: 0.360289
Iter 1/10: ladvise speed: 0.282514
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.32148
Iter 2/10: OSS cache speed: 0.256932
Iter 2/10: ladvise speed: 0.359243
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.33214
Iter 3/10: OSS cache speed: 0.293172
Iter 3/10: ladvise speed: 0.324507
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.353445
Iter 4/10: OSS cache speed: 0.352223
Iter 4/10: ladvise speed: 0.368131
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.394263
Iter 5/10: OSS cache speed: 0.433329
Iter 5/10: ladvise speed: 0.448828
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.441429
Iter 6/10: OSS cache speed: 0.495892
Iter 6/10: ladvise speed: 0.404988
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.28915
Iter 7/10: OSS cache speed: 0.368745
Iter 7/10: ladvise speed: 0.368553
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.377913
Iter 8/10: OSS cache speed: 0.375086
Iter 8/10: ladvise speed: 0.382289
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.362477
Iter 9/10: OSS cache speed: 0.362163
Iter 9/10: ladvise speed: 0.383218
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.383037
Iter 10/10: OSS cache speed: 0.391936
Iter 10/10: ladvise speed: 0.399052
Average uncached read: .36
Average speedup with OSS cached read:  .36 = +0%
Average speedup with ladvise willread:  .37 = +2%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0