== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:26:22 (1787390782)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.7781 s, 6.6 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-ffff9ad249973800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.355432
Iter 1/10: OSS cache speed: 0.352317
Iter 1/10: ladvise speed: 0.432207
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.321501
Iter 2/10: OSS cache speed: 0.359804
Iter 2/10: ladvise speed: 0.323803
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.317725
Iter 3/10: OSS cache speed: 0.396295
Iter 3/10: ladvise speed: 0.317631
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.277103
Iter 4/10: OSS cache speed: 0.337584
Iter 4/10: ladvise speed: 0.29992
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.269363
Iter 5/10: OSS cache speed: 0.328041
Iter 5/10: ladvise speed: 0.334727
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.370156
Iter 6/10: OSS cache speed: 0.34109
Iter 6/10: ladvise speed: 0.299951
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.315212
Iter 7/10: OSS cache speed: 0.34311
Iter 7/10: ladvise speed: 0.361702
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.352915
Iter 8/10: OSS cache speed: 0.300303
Iter 8/10: ladvise speed: 0.387134
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.389867
Iter 9/10: OSS cache speed: 0.391982
Iter 9/10: ladvise speed: 0.381613
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.306992
Iter 10/10: OSS cache speed: 0.331862
Iter 10/10: ladvise speed: 0.376699
Average uncached read: .32
Average speedup with OSS cached read:  .34 = +6%
Average speedup with ladvise willread:  .35 = +9%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0