== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:43:23 (1769057003)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.7151 s, 7.6 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-ffff9ecbc840c000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.399892
Iter 1/10: OSS cache speed: 0.453101
Iter 1/10: ladvise speed: 0.460073
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.484394
Iter 2/10: OSS cache speed: 0.497346
Iter 2/10: ladvise speed: 0.459559
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.425138
Iter 3/10: OSS cache speed: 0.213057
Iter 3/10: ladvise speed: 0.283488
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.275248
Iter 4/10: OSS cache speed: 0.313529
Iter 4/10: ladvise speed: 0.268949
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.306532
Iter 5/10: OSS cache speed: 0.269754
Iter 5/10: ladvise speed: 0.275923
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.287651
Iter 6/10: OSS cache speed: 0.340974
Iter 6/10: ladvise speed: 0.31057
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.312173
Iter 7/10: OSS cache speed: 0.320384
Iter 7/10: ladvise speed: 0.294777
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.293953
Iter 8/10: OSS cache speed: 0.274251
Iter 8/10: ladvise speed: 0.308901
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.300386
Iter 9/10: OSS cache speed: 0.306562
Iter 9/10: ladvise speed: 0.311237
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.303613
Iter 10/10: OSS cache speed: 0.290713
Iter 10/10: ladvise speed: 0.283573
Average uncached read: .33
Average speedup with OSS cached read:  .32 = +-3%
Average speedup with ladvise willread:  .32 = +-3%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0