== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:25:03 (1790659503)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.0212 s, 8.7 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-ffff8ed4117a9000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.480845
Iter 1/10: OSS cache speed: 0.453563
Iter 1/10: ladvise speed: 0.344173
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.297399
Iter 2/10: OSS cache speed: 0.349379
Iter 2/10: ladvise speed: 0.435804
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.29515
Iter 3/10: OSS cache speed: 0.383007
Iter 3/10: ladvise speed: 0.399631
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.392449
Iter 4/10: OSS cache speed: 0.446332
Iter 4/10: ladvise speed: 0.415083
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.338885
Iter 5/10: OSS cache speed: 0.370358
Iter 5/10: ladvise speed: 0.407771
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.422
Iter 6/10: OSS cache speed: 0.397856
Iter 6/10: ladvise speed: 0.433949
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.380905
Iter 7/10: OSS cache speed: 0.345706
Iter 7/10: ladvise speed: 0.33248
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.359816
Iter 8/10: OSS cache speed: 0.336269
Iter 8/10: ladvise speed: 0.449399
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.385756
Iter 9/10: OSS cache speed: 0.486355
Iter 9/10: ladvise speed: 0.396708
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.319757
Iter 10/10: OSS cache speed: 0.362407
Iter 10/10: ladvise speed: 0.33112
Average uncached read: .36
Average speedup with OSS cached read:  .39 = +8%
Average speedup with ladvise willread:  .39 = +8%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0