== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:55:03 (1786762503)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.4422 s, 7.3 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-ffff9a8cc617b800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.361593
Iter 1/10: OSS cache speed: 0.357108
Iter 1/10: ladvise speed: 0.353069
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.417916
Iter 2/10: OSS cache speed: 0.402129
Iter 2/10: ladvise speed: 0.379763
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.368631
Iter 3/10: OSS cache speed: 0.387045
Iter 3/10: ladvise speed: 0.392555
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.385539
Iter 4/10: OSS cache speed: 0.474164
Iter 4/10: ladvise speed: 0.397652
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.411795
Iter 5/10: OSS cache speed: 0.422989
Iter 5/10: ladvise speed: 0.439514
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.38473
Iter 6/10: OSS cache speed: 0.447769
Iter 6/10: ladvise speed: 0.438588
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.397898
Iter 7/10: OSS cache speed: 0.399595
Iter 7/10: ladvise speed: 0.342329
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.355764
Iter 8/10: OSS cache speed: 0.340142
Iter 8/10: ladvise speed: 0.391092
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.423365
Iter 9/10: OSS cache speed: 0.407604
Iter 9/10: ladvise speed: 0.336789
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.473976
Iter 10/10: OSS cache speed: 0.451565
Iter 10/10: ladvise speed: 0.382538
Average uncached read: .39
Average speedup with OSS cached read:  .40 = +2%
Average speedup with ladvise willread:  .38 = +-2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0