== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:25:39 (1787862339)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.8352 s, 9.7 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-ffff933e095f0000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.389164
Iter 1/10: OSS cache speed: 0.373659
Iter 1/10: ladvise speed: 0.497117
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.494719
Iter 2/10: OSS cache speed: 0.431184
Iter 2/10: ladvise speed: 0.493972
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.438414
Iter 3/10: OSS cache speed: 0.507806
Iter 3/10: ladvise speed: 0.47593
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.437573
Iter 4/10: OSS cache speed: 0.387348
Iter 4/10: ladvise speed: 0.416819
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.416767
Iter 5/10: OSS cache speed: 0.416777
Iter 5/10: ladvise speed: 0.423173
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.362486
Iter 6/10: OSS cache speed: 0.450006
Iter 6/10: ladvise speed: 0.358985
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.400825
Iter 7/10: OSS cache speed: 0.494647
Iter 7/10: ladvise speed: 0.383673
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.384417
Iter 8/10: OSS cache speed: 0.480473
Iter 8/10: ladvise speed: 0.40707
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.493362
Iter 9/10: OSS cache speed: 0.501049
Iter 9/10: ladvise speed: 0.469067
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.341374
Iter 10/10: OSS cache speed: 0.402221
Iter 10/10: ladvise speed: 0.495972
Average uncached read: .41
Average speedup with OSS cached read:  .44 = +7%
Average speedup with ladvise willread:  .44 = +7%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0