== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:52:16 (1790103136)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.7846 s, 8.2 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-ffff89d84949f800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.446932
Iter 1/10: OSS cache speed: 0.434665
Iter 1/10: ladvise speed: 0.370975
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.402089
Iter 2/10: OSS cache speed: 0.391472
Iter 2/10: ladvise speed: 0.506339
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.506936
Iter 3/10: OSS cache speed: 0.459838
Iter 3/10: ladvise speed: 0.603977
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.609632
Iter 4/10: OSS cache speed: 0.610115
Iter 4/10: ladvise speed: 0.405479
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.297685
Iter 5/10: OSS cache speed: 0.388689
Iter 5/10: ladvise speed: 0.41978
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.34539
Iter 6/10: OSS cache speed: 0.349262
Iter 6/10: ladvise speed: 0.37666
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.421987
Iter 7/10: OSS cache speed: 0.463098
Iter 7/10: ladvise speed: 0.45694
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.442568
Iter 8/10: OSS cache speed: 0.371207
Iter 8/10: ladvise speed: 0.475616
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.396206
Iter 9/10: OSS cache speed: 0.445224
Iter 9/10: ladvise speed: 0.403873
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.386079
Iter 10/10: OSS cache speed: 0.402237
Iter 10/10: ladvise speed: 0.393975
Average uncached read: .42
Average speedup with OSS cached read:  .43 = +2%
Average speedup with ladvise willread:  .44 = +4%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0