== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:39:56 (1789018796)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.603 s, 9.9 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-ffff99c060efd000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.435307
Iter 1/10: OSS cache speed: 0.464558
Iter 1/10: ladvise speed: 0.484769
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.446458
Iter 2/10: OSS cache speed: 0.37731
Iter 2/10: ladvise speed: 0.402923
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.454331
Iter 3/10: OSS cache speed: 0.439277
Iter 3/10: ladvise speed: 0.379553
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.40222
Iter 4/10: OSS cache speed: 0.421372
Iter 4/10: ladvise speed: 0.436101
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.339872
Iter 5/10: OSS cache speed: 0.432586
Iter 5/10: ladvise speed: 0.39821
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.385272
Iter 6/10: OSS cache speed: 0.372767
Iter 6/10: ladvise speed: 0.357858
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.368481
Iter 7/10: OSS cache speed: 0.443825
Iter 7/10: ladvise speed: 0.416896
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.317767
Iter 8/10: OSS cache speed: 0.396411
Iter 8/10: ladvise speed: 0.319613
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.408076
Iter 9/10: OSS cache speed: 0.401796
Iter 9/10: ladvise speed: 0.340043
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.328345
Iter 10/10: OSS cache speed: 0.37526
Iter 10/10: ladvise speed: 0.384742
Average uncached read: .38
Average speedup with OSS cached read:  .41 = +7%
Average speedup with ladvise willread:  .39 = +2%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0