== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:33:46 (1788514426)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.2755 s, 8.5 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-ffff9c3584aee000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.379219
Iter 1/10: OSS cache speed: 0.47788
Iter 1/10: ladvise speed: 0.480485
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.351056
Iter 2/10: OSS cache speed: 0.438772
Iter 2/10: ladvise speed: 0.396356
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.397831
Iter 3/10: OSS cache speed: 0.376869
Iter 3/10: ladvise speed: 0.430892
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.424885
Iter 4/10: OSS cache speed: 0.475798
Iter 4/10: ladvise speed: 0.46333
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.436199
Iter 5/10: OSS cache speed: 0.406411
Iter 5/10: ladvise speed: 0.410601
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.332462
Iter 6/10: OSS cache speed: 0.40044
Iter 6/10: ladvise speed: 0.41642
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.377065
Iter 7/10: OSS cache speed: 0.371651
Iter 7/10: ladvise speed: 0.447441
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.382568
Iter 8/10: OSS cache speed: 0.381899
Iter 8/10: ladvise speed: 0.382763
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.34498
Iter 9/10: OSS cache speed: 0.392233
Iter 9/10: ladvise speed: 0.421332
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.365807
Iter 10/10: OSS cache speed: 0.400549
Iter 10/10: ladvise speed: 0.402829
Average uncached read: .37
Average speedup with OSS cached read:  .41 = +10%
Average speedup with ladvise willread:  .42 = +13%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0