== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:22:28 (1789132948)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.4346 s, 8.4 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-ffff8bc15089d800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.389975
Iter 1/10: OSS cache speed: 0.421565
Iter 1/10: ladvise speed: 0.455637
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.380357
Iter 2/10: OSS cache speed: 0.434811
Iter 2/10: ladvise speed: 0.422478
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.361652
Iter 3/10: OSS cache speed: 0.383486
Iter 3/10: ladvise speed: 0.349317
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.314965
Iter 4/10: OSS cache speed: 0.395481
Iter 4/10: ladvise speed: 0.399051
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.295792
Iter 5/10: OSS cache speed: 0.38307
Iter 5/10: ladvise speed: 0.438265
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.403806
Iter 6/10: OSS cache speed: 0.429054
Iter 6/10: ladvise speed: 0.384522
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.351261
Iter 7/10: OSS cache speed: 0.396825
Iter 7/10: ladvise speed: 0.415823
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.369694
Iter 8/10: OSS cache speed: 0.377355
Iter 8/10: ladvise speed: 0.404067
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.36505
Iter 9/10: OSS cache speed: 0.357946
Iter 9/10: ladvise speed: 0.365777
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.294498
Iter 10/10: OSS cache speed: 0.319796
Iter 10/10: ladvise speed: 0.386431
Average uncached read: .35
Average speedup with OSS cached read:  .38 = +8%
Average speedup with ladvise willread:  .40 = +14%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0