== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:53:04 (1789066384)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.4256 s, 9.2 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-ffff8fec06a8c000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.333807
Iter 1/10: OSS cache speed: 0.331991
Iter 1/10: ladvise speed: 0.351898
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.336681
Iter 2/10: OSS cache speed: 0.328179
Iter 2/10: ladvise speed: 0.364562
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.386653
Iter 3/10: OSS cache speed: 0.374142
Iter 3/10: ladvise speed: 0.377736
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.39451
Iter 4/10: OSS cache speed: 0.391499
Iter 4/10: ladvise speed: 0.354974
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.367214
Iter 5/10: OSS cache speed: 0.37689
Iter 5/10: ladvise speed: 0.393617
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.395433
Iter 6/10: OSS cache speed: 0.447413
Iter 6/10: ladvise speed: 0.448568
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.424272
Iter 7/10: OSS cache speed: 0.418803
Iter 7/10: ladvise speed: 0.338718
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.330448
Iter 8/10: OSS cache speed: 0.393311
Iter 8/10: ladvise speed: 0.36761
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.407613
Iter 9/10: OSS cache speed: 0.369983
Iter 9/10: ladvise speed: 0.383834
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.33003
Iter 10/10: OSS cache speed: 0.372441
Iter 10/10: ladvise speed: 0.38667
Average uncached read: .37
Average speedup with OSS cached read:  .38 = +2%
Average speedup with ladvise willread:  .37 = +0%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0