== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:00:18 (1790787618)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.9929 s, 9.5 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-ffff8a7450b73000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.353508
Iter 1/10: OSS cache speed: 0.333471
Iter 1/10: ladvise speed: 0.371607
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.376994
Iter 2/10: OSS cache speed: 0.358988
Iter 2/10: ladvise speed: 0.398047
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.392706
Iter 3/10: OSS cache speed: 0.357902
Iter 3/10: ladvise speed: 0.337085
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.346013
Iter 4/10: OSS cache speed: 0.366739
Iter 4/10: ladvise speed: 0.334956
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.334733
Iter 5/10: OSS cache speed: 0.334541
Iter 5/10: ladvise speed: 0.32488
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.325327
Iter 6/10: OSS cache speed: 0.333546
Iter 6/10: ladvise speed: 0.336199
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.375619
Iter 7/10: OSS cache speed: 0.332794
Iter 7/10: ladvise speed: 0.375341
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.341672
Iter 8/10: OSS cache speed: 0.34428
Iter 8/10: ladvise speed: 0.366049
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.371956
Iter 9/10: OSS cache speed: 0.370821
Iter 9/10: ladvise speed: 0.334041
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.330392
Iter 10/10: OSS cache speed: 0.386477
Iter 10/10: ladvise speed: 0.408271
Average uncached read: .35
Average speedup with OSS cached read:  .35 = +0%
Average speedup with ladvise willread:  .35 = +0%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0