== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:00:34 (1789585234)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 16.0897 s, 6.5 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-ffff8dd8cad51000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.357226
Iter 1/10: OSS cache speed: 0.314805
Iter 1/10: ladvise speed: 0.383145
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.348784
Iter 2/10: OSS cache speed: 0.400248
Iter 2/10: ladvise speed: 0.375947
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.403328
Iter 3/10: OSS cache speed: 0.436572
Iter 3/10: ladvise speed: 0.390388
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.332688
Iter 4/10: OSS cache speed: 0.366121
Iter 4/10: ladvise speed: 0.374406
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.341533
Iter 5/10: OSS cache speed: 0.361609
Iter 5/10: ladvise speed: 0.348267
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.346934
Iter 6/10: OSS cache speed: 0.31837
Iter 6/10: ladvise speed: 0.369519
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.325373
Iter 7/10: OSS cache speed: 0.360312
Iter 7/10: ladvise speed: 0.360737
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.335947
Iter 8/10: OSS cache speed: 0.378136
Iter 8/10: ladvise speed: 0.353796
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.383298
Iter 9/10: OSS cache speed: 0.35978
Iter 9/10: ladvise speed: 0.363719
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.336815
Iter 10/10: OSS cache speed: 0.377212
Iter 10/10: ladvise speed: 0.369875
Average uncached read: .35
Average speedup with OSS cached read:  .36 = +2%
Average speedup with ladvise willread:  .36 = +2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0