== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:00:27 (1789138827)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.8452 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-ffff98f0c51c9000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.328605
Iter 1/10: OSS cache speed: 0.373062
Iter 1/10: ladvise speed: 0.430285
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.419612
Iter 2/10: OSS cache speed: 0.410788
Iter 2/10: ladvise speed: 0.444341
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.391253
Iter 3/10: OSS cache speed: 0.496995
Iter 3/10: ladvise speed: 0.362423
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.390772
Iter 4/10: OSS cache speed: 0.375217
Iter 4/10: ladvise speed: 0.394459
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.406079
Iter 5/10: OSS cache speed: 0.404415
Iter 5/10: ladvise speed: 0.395863
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.379904
Iter 6/10: OSS cache speed: 0.352814
Iter 6/10: ladvise speed: 0.396092
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.410611
Iter 7/10: OSS cache speed: 0.43466
Iter 7/10: ladvise speed: 0.309069
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.406375
Iter 8/10: OSS cache speed: 0.382587
Iter 8/10: ladvise speed: 0.417011
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.324962
Iter 9/10: OSS cache speed: 0.363184
Iter 9/10: ladvise speed: 0.327571
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.369437
Iter 10/10: OSS cache speed: 0.384385
Iter 10/10: ladvise speed: 0.371323
Average uncached read: .38
Average speedup with OSS cached read:  .39 = +2%
Average speedup with ladvise willread:  .38 = +0%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0