== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:26:54 (1787909214)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 18.749 s, 5.6 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-ffff8e29992ca800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.356613
Iter 1/10: OSS cache speed: 0.400291
Iter 1/10: ladvise speed: 0.349463
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.419165
Iter 2/10: OSS cache speed: 0.373936
Iter 2/10: ladvise speed: 0.414507
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.357174
Iter 3/10: OSS cache speed: 0.359791
Iter 3/10: ladvise speed: 0.384431
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.384653
Iter 4/10: OSS cache speed: 0.392976
Iter 4/10: ladvise speed: 0.39973
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.398834
Iter 5/10: OSS cache speed: 0.302479
Iter 5/10: ladvise speed: 0.401595
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.413907
Iter 6/10: OSS cache speed: 0.405196
Iter 6/10: ladvise speed: 0.426869
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.3813
Iter 7/10: OSS cache speed: 0.42437
Iter 7/10: ladvise speed: 0.310163
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.264816
Iter 8/10: OSS cache speed: 0.365708
Iter 8/10: ladvise speed: 0.295083
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.367265
Iter 9/10: OSS cache speed: 0.348912
Iter 9/10: ladvise speed: 0.374101
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.308447
Iter 10/10: OSS cache speed: 0.35534
Iter 10/10: ladvise speed: 0.433868
Average uncached read: .36
Average speedup with OSS cached read:  .37 = +2%
Average speedup with ladvise willread:  .37 = +2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0