== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:05:54 (1789520754)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.4704 s, 10.0 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-ffff9697e05d5800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.385131
Iter 1/10: OSS cache speed: 0.389029
Iter 1/10: ladvise speed: 0.382708
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.392594
Iter 2/10: OSS cache speed: 0.400338
Iter 2/10: ladvise speed: 0.399991
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.362306
Iter 3/10: OSS cache speed: 0.368355
Iter 3/10: ladvise speed: 0.338874
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.390302
Iter 4/10: OSS cache speed: 0.368819
Iter 4/10: ladvise speed: 0.378175
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.351902
Iter 5/10: OSS cache speed: 0.408168
Iter 5/10: ladvise speed: 0.397799
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.393278
Iter 6/10: OSS cache speed: 0.3878
Iter 6/10: ladvise speed: 0.41228
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.413875
Iter 7/10: OSS cache speed: 0.397769
Iter 7/10: ladvise speed: 0.411898
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.385757
Iter 8/10: OSS cache speed: 0.337896
Iter 8/10: ladvise speed: 0.434702
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.377379
Iter 9/10: OSS cache speed: 0.411743
Iter 9/10: ladvise speed: 0.391555
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.418324
Iter 10/10: OSS cache speed: 0.415316
Iter 10/10: ladvise speed: 0.394403
Average uncached read: .38
Average speedup with OSS cached read:  .38 = +0%
Average speedup with ladvise willread:  .39 = +2%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0