== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:25:44 (1787563544)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.8271 s, 8.9 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-ffff92a747e25800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.333942
Iter 1/10: OSS cache speed: 0.404134
Iter 1/10: ladvise speed: 0.34139
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.394244
Iter 2/10: OSS cache speed: 0.365309
Iter 2/10: ladvise speed: 0.433394
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.465996
Iter 3/10: OSS cache speed: 0.430047
Iter 3/10: ladvise speed: 0.438988
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.439897
Iter 4/10: OSS cache speed: 0.47766
Iter 4/10: ladvise speed: 0.512299
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.412231
Iter 5/10: OSS cache speed: 0.468054
Iter 5/10: ladvise speed: 0.447567
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.421065
Iter 6/10: OSS cache speed: 0.404046
Iter 6/10: ladvise speed: 0.43166
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.425311
Iter 7/10: OSS cache speed: 0.433101
Iter 7/10: ladvise speed: 0.4199
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.436224
Iter 8/10: OSS cache speed: 0.453479
Iter 8/10: ladvise speed: 0.473223
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.455444
Iter 9/10: OSS cache speed: 0.470352
Iter 9/10: ladvise speed: 0.485832
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.432276
Iter 10/10: OSS cache speed: 0.368063
Iter 10/10: ladvise speed: 0.456133
Average uncached read: .42
Average speedup with OSS cached read:  .42 = +0%
Average speedup with ladvise willread:  .44 = +4%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0