== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:33:31 (1789126411)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.6393 s, 9.0 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-ffff94dd832eb800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.415736
Iter 1/10: OSS cache speed: 0.49247
Iter 1/10: ladvise speed: 0.474121
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.399549
Iter 2/10: OSS cache speed: 0.405289
Iter 2/10: ladvise speed: 0.423101
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.406298
Iter 3/10: OSS cache speed: 0.485654
Iter 3/10: ladvise speed: 0.404325
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.367325
Iter 4/10: OSS cache speed: 0.48571
Iter 4/10: ladvise speed: 0.429795
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.388977
Iter 5/10: OSS cache speed: 0.458929
Iter 5/10: ladvise speed: 0.454182
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.388253
Iter 6/10: OSS cache speed: 0.43619
Iter 6/10: ladvise speed: 0.429595
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.418783
Iter 7/10: OSS cache speed: 0.460843
Iter 7/10: ladvise speed: 0.475781
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.400263
Iter 8/10: OSS cache speed: 0.436493
Iter 8/10: ladvise speed: 0.425768
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.351621
Iter 9/10: OSS cache speed: 0.426002
Iter 9/10: ladvise speed: 0.370744
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.381793
Iter 10/10: OSS cache speed: 0.430336
Iter 10/10: ladvise speed: 0.421394
Average uncached read: .39
Average speedup with OSS cached read:  .45 = +15%
Average speedup with ladvise willread:  .43 = +10%
Speedup with OSS cached read less than 20%,  got 15%. Skipping ladvise willread check.
fail_loc=0