== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:36:09 (1721406969)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.628048 s, 167 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=4
fail_loc=0x237
Asynchronous ladvise shouldn't wait
fail_loc=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 6.25179
Iter 1/10: OSS cache speed: 5.98067
Iter 1/10: ladvise speed: 6.66357
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 5.14269
Iter 2/10: OSS cache speed: 5.15627
Iter 2/10: ladvise speed: 5.17046
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 5.05071
Iter 3/10: OSS cache speed: 6.57778
Iter 3/10: ladvise speed: 7.12113
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 6.22162
Iter 4/10: OSS cache speed: 6.10041
Iter 4/10: ladvise speed: 6.23761
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 5.75245
Iter 5/10: OSS cache speed: 6.60303
Iter 5/10: ladvise speed: 6.66279
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 5.75995
Iter 6/10: OSS cache speed: 6.458
Iter 6/10: ladvise speed: 6.21626
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 6.29337
Iter 7/10: OSS cache speed: 7.36858
Iter 7/10: ladvise speed: 7.23601
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 5.82734
Iter 8/10: OSS cache speed: 6.01986
Iter 8/10: ladvise speed: 6.46694
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 5.89998
Iter 9/10: OSS cache speed: 6.18149
Iter 9/10: ladvise speed: 6.691
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 5.75725
Iter 10/10: OSS cache speed: 6.02762
Iter 10/10: ladvise speed: 6.25666
Average uncached read: 5.79
Average speedup with OSS cached read:  6.24 = +7.77%
Average speedup with ladvise willread:  6.47 = +11.74%
Speedup with OSS cached read less than 20%,  got 6.24%. Skipping ladvise willread check.