== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:14:54 (1746072894)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 4.33349 s, 24.2 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-ffff8800b3de7000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.766405
Iter 1/10: OSS cache speed: 0.967439
Iter 1/10: ladvise speed: 1.07234
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.839026
Iter 2/10: OSS cache speed: 0.870639
Iter 2/10: ladvise speed: 0.847039
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.846331
Iter 3/10: OSS cache speed: 1.00578
Iter 3/10: ladvise speed: 1.02801
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.802756
Iter 4/10: OSS cache speed: 0.868243
Iter 4/10: ladvise speed: 1.00813
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.84234
Iter 5/10: OSS cache speed: 1.0074
Iter 5/10: ladvise speed: 1.15416
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.906754
Iter 6/10: OSS cache speed: 1.104
Iter 6/10: ladvise speed: 1.15291
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.00741
Iter 7/10: OSS cache speed: 1.07128
Iter 7/10: ladvise speed: 0.973134
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.04001
Iter 8/10: OSS cache speed: 1.14901
Iter 8/10: ladvise speed: 1.14345
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.19529
Iter 9/10: OSS cache speed: 1.47403
Iter 9/10: ladvise speed: 1.37261
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.825099
Iter 10/10: OSS cache speed: 1.15849
Iter 10/10: ladvise speed: 1.32776
Average uncached read: .90
Average speedup with OSS cached read:  1.06 = +17%
Average speedup with ladvise willread:  1.10 = +22%
Speedup with OSS cached read less than 20%,  got 17%. Skipping ladvise willread check.
fail_loc=0