== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:36:21 (1787708181)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.3779 s, 7.8 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-ffff9b9520234800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.405457
Iter 1/10: OSS cache speed: 0.398679
Iter 1/10: ladvise speed: 0.376832
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.390832
Iter 2/10: OSS cache speed: 0.380762
Iter 2/10: ladvise speed: 0.419957
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.427586
Iter 3/10: OSS cache speed: 0.39959
Iter 3/10: ladvise speed: 0.387176
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.390695
Iter 4/10: OSS cache speed: 0.427875
Iter 4/10: ladvise speed: 0.244486
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.370879
Iter 5/10: OSS cache speed: 0.435112
Iter 5/10: ladvise speed: 0.433251
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.326355
Iter 6/10: OSS cache speed: 0.384496
Iter 6/10: ladvise speed: 0.466767
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.401215
Iter 7/10: OSS cache speed: 0.422583
Iter 7/10: ladvise speed: 0.388982
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.293182
Iter 8/10: OSS cache speed: 0.398461
Iter 8/10: ladvise speed: 0.320993
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.412129
Iter 9/10: OSS cache speed: 0.380242
Iter 9/10: ladvise speed: 0.4814
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.426566
Iter 10/10: OSS cache speed: 0.425475
Iter 10/10: ladvise speed: 0.326886
Average uncached read: .38
Average speedup with OSS cached read:  .40 = +5%
Average speedup with ladvise willread:  .38 = +0%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0