== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:48:50 (1789123730)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.0056 s, 8.1 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-ffffa09511711800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.392979
Iter 1/10: OSS cache speed: 0.433978
Iter 1/10: ladvise speed: 0.395991
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.382683
Iter 2/10: OSS cache speed: 0.322061
Iter 2/10: ladvise speed: 0.438399
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.367202
Iter 3/10: OSS cache speed: 0.401513
Iter 3/10: ladvise speed: 0.4017
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.333185
Iter 4/10: OSS cache speed: 0.399692
Iter 4/10: ladvise speed: 0.43178
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.343378
Iter 5/10: OSS cache speed: 0.382303
Iter 5/10: ladvise speed: 0.457262
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.375026
Iter 6/10: OSS cache speed: 0.423412
Iter 6/10: ladvise speed: 0.420495
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.352907
Iter 7/10: OSS cache speed: 0.343637
Iter 7/10: ladvise speed: 0.399014
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.372079
Iter 8/10: OSS cache speed: 0.314639
Iter 8/10: ladvise speed: 0.411654
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.352437
Iter 9/10: OSS cache speed: 0.388583
Iter 9/10: ladvise speed: 0.394636
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.313454
Iter 10/10: OSS cache speed: 0.324332
Iter 10/10: ladvise speed: 0.358423
Average uncached read: .35
Average speedup with OSS cached read:  .37 = +5%
Average speedup with ladvise willread:  .41 = +17%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0