== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:37:48 (1787787468)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.7568 s, 8.9 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-ffff9b2411a7b000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.426212
Iter 1/10: OSS cache speed: 0.374077
Iter 1/10: ladvise speed: 0.387593
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.379483
Iter 2/10: OSS cache speed: 0.432514
Iter 2/10: ladvise speed: 0.452562
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.429623
Iter 3/10: OSS cache speed: 0.433351
Iter 3/10: ladvise speed: 0.328193
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.452124
Iter 4/10: OSS cache speed: 0.48464
Iter 4/10: ladvise speed: 0.464925
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.446836
Iter 5/10: OSS cache speed: 0.441041
Iter 5/10: ladvise speed: 0.37907
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.465765
Iter 6/10: OSS cache speed: 0.450815
Iter 6/10: ladvise speed: 0.472827
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.467428
Iter 7/10: OSS cache speed: 0.487582
Iter 7/10: ladvise speed: 0.405672
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.433291
Iter 8/10: OSS cache speed: 0.425163
Iter 8/10: ladvise speed: 0.479981
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.492097
Iter 9/10: OSS cache speed: 0.441863
Iter 9/10: ladvise speed: 0.504782
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.512201
Iter 10/10: OSS cache speed: 0.509686
Iter 10/10: ladvise speed: 0.490594
Average uncached read: .45
Average speedup with OSS cached read:  .44 = +-2%
Average speedup with ladvise willread:  .43 = +-4%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0