== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:57:03 (1782730623)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.2134 s, 7.9 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-ffff929d58fd5000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.37215
Iter 1/10: OSS cache speed: 0.337832
Iter 1/10: ladvise speed: 0.355854
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.356148
Iter 2/10: OSS cache speed: 0.399127
Iter 2/10: ladvise speed: 0.384238
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.350976
Iter 3/10: OSS cache speed: 0.444311
Iter 3/10: ladvise speed: 0.400854
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.355492
Iter 4/10: OSS cache speed: 0.380407
Iter 4/10: ladvise speed: 0.355798
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.381336
Iter 5/10: OSS cache speed: 0.37251
Iter 5/10: ladvise speed: 0.411142
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.367079
Iter 6/10: OSS cache speed: 0.405408
Iter 6/10: ladvise speed: 0.357874
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.322194
Iter 7/10: OSS cache speed: 0.360488
Iter 7/10: ladvise speed: 0.318667
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.391024
Iter 8/10: OSS cache speed: 0.353736
Iter 8/10: ladvise speed: 0.368064
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.357303
Iter 9/10: OSS cache speed: 0.40223
Iter 9/10: ladvise speed: 0.440458
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.399306
Iter 10/10: OSS cache speed: 0.338974
Iter 10/10: ladvise speed: 0.371035
Average uncached read: .36
Average speedup with OSS cached read:  .37 = +2%
Average speedup with ladvise willread:  .37 = +2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0