== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:33:51 (1786746831)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.6051 s, 9.9 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-ffff95f003e7e000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.388021
Iter 1/10: OSS cache speed: 0.3989
Iter 1/10: ladvise speed: 0.363588
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.370985
Iter 2/10: OSS cache speed: 0.42816
Iter 2/10: ladvise speed: 0.431142
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.409395
Iter 3/10: OSS cache speed: 0.451287
Iter 3/10: ladvise speed: 0.464315
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.428427
Iter 4/10: OSS cache speed: 0.452229
Iter 4/10: ladvise speed: 0.431633
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.401692
Iter 5/10: OSS cache speed: 0.455306
Iter 5/10: ladvise speed: 0.436887
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.41011
Iter 6/10: OSS cache speed: 0.430413
Iter 6/10: ladvise speed: 0.448495
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.376639
Iter 7/10: OSS cache speed: 0.381839
Iter 7/10: ladvise speed: 0.468649
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.409511
Iter 8/10: OSS cache speed: 0.419285
Iter 8/10: ladvise speed: 0.370136
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.346854
Iter 9/10: OSS cache speed: 0.382283
Iter 9/10: ladvise speed: 0.414636
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.328354
Iter 10/10: OSS cache speed: 0.382722
Iter 10/10: ladvise speed: 0.356763
Average uncached read: .38
Average speedup with OSS cached read:  .41 = +7%
Average speedup with ladvise willread:  .41 = +7%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0