== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:12:09 (1788192729)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.2113 s, 10.3 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-ffff92f0861f3000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.40914
Iter 1/10: OSS cache speed: 0.419921
Iter 1/10: ladvise speed: 0.415093
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.316529
Iter 2/10: OSS cache speed: 0.404169
Iter 2/10: ladvise speed: 0.393276
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.445318
Iter 3/10: OSS cache speed: 0.353565
Iter 3/10: ladvise speed: 0.380308
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.358772
Iter 4/10: OSS cache speed: 0.389834
Iter 4/10: ladvise speed: 0.387578
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.415985
Iter 5/10: OSS cache speed: 0.378726
Iter 5/10: ladvise speed: 0.41431
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.448479
Iter 6/10: OSS cache speed: 0.39368
Iter 6/10: ladvise speed: 0.433937
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.409447
Iter 7/10: OSS cache speed: 0.403491
Iter 7/10: ladvise speed: 0.390216
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.389739
Iter 8/10: OSS cache speed: 0.363203
Iter 8/10: ladvise speed: 0.371995
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.366331
Iter 9/10: OSS cache speed: 0.379715
Iter 9/10: ladvise speed: 0.337118
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.324125
Iter 10/10: OSS cache speed: 0.334331
Iter 10/10: ladvise speed: 0.379498
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