== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:01:10 (1787367670)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.6179 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-ffff8b76d0ede800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.425595
Iter 1/10: OSS cache speed: 0.412482
Iter 1/10: ladvise speed: 0.388777
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.410414
Iter 2/10: OSS cache speed: 0.404819
Iter 2/10: ladvise speed: 0.395197
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.388549
Iter 3/10: OSS cache speed: 0.362227
Iter 3/10: ladvise speed: 0.420924
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.383467
Iter 4/10: OSS cache speed: 0.339745
Iter 4/10: ladvise speed: 0.40292
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.396427
Iter 5/10: OSS cache speed: 0.393685
Iter 5/10: ladvise speed: 0.395406
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.414801
Iter 6/10: OSS cache speed: 0.379163
Iter 6/10: ladvise speed: 0.40144
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.399279
Iter 7/10: OSS cache speed: 0.387153
Iter 7/10: ladvise speed: 0.370031
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.426615
Iter 8/10: OSS cache speed: 0.361674
Iter 8/10: ladvise speed: 0.387262
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.364241
Iter 9/10: OSS cache speed: 0.340186
Iter 9/10: ladvise speed: 0.38551
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.374916
Iter 10/10: OSS cache speed: 0.363013
Iter 10/10: ladvise speed: 0.387738
Average uncached read: .39
Average speedup with OSS cached read:  .37 = +-5%
Average speedup with ladvise willread:  .39 = +0%
Speedup with OSS cached read less than 20%,  got -5%. Skipping ladvise willread check.
fail_loc=0