== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:49:59 (1771440599)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.72718 s, 18.3 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-ffff8a6687dee800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.09986
Iter 1/10: OSS cache speed: 2.30774
Iter 1/10: ladvise speed: 2.12312
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.87067
Iter 2/10: OSS cache speed: 2.05038
Iter 2/10: ladvise speed: 1.86336
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.0166
Iter 3/10: OSS cache speed: 1.91304
Iter 3/10: ladvise speed: 2.0633
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.77188
Iter 4/10: OSS cache speed: 1.81104
Iter 4/10: ladvise speed: 1.95654
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.15418
Iter 5/10: OSS cache speed: 2.23081
Iter 5/10: ladvise speed: 2.24407
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.09581
Iter 6/10: OSS cache speed: 2.34422
Iter 6/10: ladvise speed: 2.45979
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.29185
Iter 7/10: OSS cache speed: 2.32045
Iter 7/10: ladvise speed: 2.44179
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.08772
Iter 8/10: OSS cache speed: 2.21031
Iter 8/10: ladvise speed: 2.20769
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.0423
Iter 9/10: OSS cache speed: 2.09674
Iter 9/10: ladvise speed: 2.19787
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.07113
Iter 10/10: OSS cache speed: 2.35086
Iter 10/10: ladvise speed: 2.00826
Average uncached read: 2.05
Average speedup with OSS cached read:  2.16 = +5%
Average speedup with ladvise willread:  2.15 = +4%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0