== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:08:34 (1787864914)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.3539 s, 8.5 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-ffff8f0bc554d800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.325735
Iter 1/10: OSS cache speed: 0.409015
Iter 1/10: ladvise speed: 0.40142
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.384128
Iter 2/10: OSS cache speed: 0.404548
Iter 2/10: ladvise speed: 0.415986
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.350706
Iter 3/10: OSS cache speed: 0.435036
Iter 3/10: ladvise speed: 0.380316
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.301294
Iter 4/10: OSS cache speed: 0.447241
Iter 4/10: ladvise speed: 0.423934
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.383987
Iter 5/10: OSS cache speed: 0.392493
Iter 5/10: ladvise speed: 0.417367
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.298366
Iter 6/10: OSS cache speed: 0.346188
Iter 6/10: ladvise speed: 0.398093
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.34138
Iter 7/10: OSS cache speed: 0.383411
Iter 7/10: ladvise speed: 0.414391
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.333565
Iter 8/10: OSS cache speed: 0.385169
Iter 8/10: ladvise speed: 0.378225
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.331999
Iter 9/10: OSS cache speed: 0.410212
Iter 9/10: ladvise speed: 0.41439
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.394667
Iter 10/10: OSS cache speed: 0.334804
Iter 10/10: ladvise speed: 0.416536
Average uncached read: .34
Average speedup with OSS cached read:  .39 = +14%
Average speedup with ladvise willread:  .40 = +17%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0