== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:23:37 (1788920617)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.7985 s, 6.6 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-ffff9fbf0afd0000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.336743
Iter 1/10: OSS cache speed: 0.359735
Iter 1/10: ladvise speed: 0.363661
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.385644
Iter 2/10: OSS cache speed: 0.493616
Iter 2/10: ladvise speed: 0.512319
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.385715
Iter 3/10: OSS cache speed: 0.392199
Iter 3/10: ladvise speed: 0.446134
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.459359
Iter 4/10: OSS cache speed: 0.575163
Iter 4/10: ladvise speed: 0.705468
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.644263
Iter 5/10: OSS cache speed: 0.243589
Iter 5/10: ladvise speed: 0.389998
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.444726
Iter 6/10: OSS cache speed: 0.462081
Iter 6/10: ladvise speed: 0.44675
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.385569
Iter 7/10: OSS cache speed: 0.438183
Iter 7/10: ladvise speed: 0.346377
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.264594
Iter 8/10: OSS cache speed: 0.393177
Iter 8/10: ladvise speed: 0.380373
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.333442
Iter 9/10: OSS cache speed: 0.365749
Iter 9/10: ladvise speed: 0.372371
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.293033
Iter 10/10: OSS cache speed: 0.332649
Iter 10/10: ladvise speed: 0.322218
Average uncached read: .39
Average speedup with OSS cached read:  .40 = +2%
Average speedup with ladvise willread:  .42 = +7%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0