== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:12:53 (1786803173)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.2801 s, 7.9 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-ffff9cda02f19000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.444246
Iter 1/10: OSS cache speed: 0.3645
Iter 1/10: ladvise speed: 0.420726
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.334351
Iter 2/10: OSS cache speed: 0.381678
Iter 2/10: ladvise speed: 0.355291
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.336739
Iter 3/10: OSS cache speed: 0.361902
Iter 3/10: ladvise speed: 0.382536
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.371842
Iter 4/10: OSS cache speed: 0.372171
Iter 4/10: ladvise speed: 0.425523
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.341644
Iter 5/10: OSS cache speed: 0.411153
Iter 5/10: ladvise speed: 0.436083
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.419541
Iter 6/10: OSS cache speed: 0.385203
Iter 6/10: ladvise speed: 0.357921
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.324727
Iter 7/10: OSS cache speed: 0.394029
Iter 7/10: ladvise speed: 0.355969
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.400513
Iter 8/10: OSS cache speed: 0.383833
Iter 8/10: ladvise speed: 0.311455
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.387754
Iter 9/10: OSS cache speed: 0.409129
Iter 9/10: ladvise speed: 0.409589
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.316702
Iter 10/10: OSS cache speed: 0.393761
Iter 10/10: ladvise speed: 0.385647
Average uncached read: .36
Average speedup with OSS cached read:  .38 = +5%
Average speedup with ladvise willread:  .38 = +5%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0