== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:59:06 (1775195946)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.4219 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-ffffa09712f6d800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.348303
Iter 1/10: OSS cache speed: 0.374017
Iter 1/10: ladvise speed: 0.36964
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.372324
Iter 2/10: OSS cache speed: 0.382531
Iter 2/10: ladvise speed: 0.368187
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.307081
Iter 3/10: OSS cache speed: 0.29157
Iter 3/10: ladvise speed: 0.214609
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.310926
Iter 4/10: OSS cache speed: 0.335664
Iter 4/10: ladvise speed: 0.357516
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.317386
Iter 5/10: OSS cache speed: 0.324387
Iter 5/10: ladvise speed: 0.346549
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.308902
Iter 6/10: OSS cache speed: 0.394594
Iter 6/10: ladvise speed: 0.423417
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.33508
Iter 7/10: OSS cache speed: 0.370734
Iter 7/10: ladvise speed: 0.329521
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.366189
Iter 8/10: OSS cache speed: 0.399
Iter 8/10: ladvise speed: 0.366593
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.349883
Iter 9/10: OSS cache speed: 0.393735
Iter 9/10: ladvise speed: 0.404942
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.440679
Iter 10/10: OSS cache speed: 0.404949
Iter 10/10: ladvise speed: 0.373315
Average uncached read: .34
Average speedup with OSS cached read:  .36 = +5%
Average speedup with ladvise willread:  .35 = +2%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0