== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:59:56 (1790773196)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.3244 s, 10.2 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-ffff9d78439d0000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.437762
Iter 1/10: OSS cache speed: 0.462926
Iter 1/10: ladvise speed: 0.44771
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.458203
Iter 2/10: OSS cache speed: 0.438503
Iter 2/10: ladvise speed: 0.405225
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.450566
Iter 3/10: OSS cache speed: 0.437301
Iter 3/10: ladvise speed: 0.486991
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.441385
Iter 4/10: OSS cache speed: 0.474991
Iter 4/10: ladvise speed: 0.49959
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.404578
Iter 5/10: OSS cache speed: 0.428022
Iter 5/10: ladvise speed: 0.402435
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.329307
Iter 6/10: OSS cache speed: 0.438377
Iter 6/10: ladvise speed: 0.342334
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.411291
Iter 7/10: OSS cache speed: 0.393455
Iter 7/10: ladvise speed: 0.430691
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.389369
Iter 8/10: OSS cache speed: 0.414008
Iter 8/10: ladvise speed: 0.370273
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.397981
Iter 9/10: OSS cache speed: 0.431524
Iter 9/10: ladvise speed: 0.365949
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.383744
Iter 10/10: OSS cache speed: 0.386229
Iter 10/10: ladvise speed: 0.403561
Average uncached read: .41
Average speedup with OSS cached read:  .43 = +4%
Average speedup with ladvise willread:  .41 = +0%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0