== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:57:52 (1788929872)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 18.3293 s, 5.7 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-ffff9d9312146000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.344114
Iter 1/10: OSS cache speed: 0.349041
Iter 1/10: ladvise speed: 0.392212
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.370241
Iter 2/10: OSS cache speed: 0.404763
Iter 2/10: ladvise speed: 0.396752
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.413532
Iter 3/10: OSS cache speed: 0.420502
Iter 3/10: ladvise speed: 0.429558
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.469166
Iter 4/10: OSS cache speed: 0.412618
Iter 4/10: ladvise speed: 0.412172
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.345482
Iter 5/10: OSS cache speed: 0.402245
Iter 5/10: ladvise speed: 0.461404
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.408965
Iter 6/10: OSS cache speed: 0.486227
Iter 6/10: ladvise speed: 0.439553
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.364578
Iter 7/10: OSS cache speed: 0.419809
Iter 7/10: ladvise speed: 0.46031
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.381167
Iter 8/10: OSS cache speed: 0.484116
Iter 8/10: ladvise speed: 0.49947
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.353541
Iter 9/10: OSS cache speed: 0.414395
Iter 9/10: ladvise speed: 0.440759
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.426979
Iter 10/10: OSS cache speed: 0.420833
Iter 10/10: ladvise speed: 0.396192
Average uncached read: .38
Average speedup with OSS cached read:  .42 = +10%
Average speedup with ladvise willread:  .43 = +13%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0