== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:17:56 (1789499876)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.42 s, 7.8 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-ffff926c6018c000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.366128
Iter 1/10: OSS cache speed: 0.346785
Iter 1/10: ladvise speed: 0.438917
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.367445
Iter 2/10: OSS cache speed: 0.386363
Iter 2/10: ladvise speed: 0.402764
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.376265
Iter 3/10: OSS cache speed: 0.391096
Iter 3/10: ladvise speed: 0.40277
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.403066
Iter 4/10: OSS cache speed: 0.434784
Iter 4/10: ladvise speed: 0.427512
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.374157
Iter 5/10: OSS cache speed: 0.450412
Iter 5/10: ladvise speed: 0.439138
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.367102
Iter 6/10: OSS cache speed: 0.439974
Iter 6/10: ladvise speed: 0.403604
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.395113
Iter 7/10: OSS cache speed: 0.394615
Iter 7/10: ladvise speed: 0.349184
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.322097
Iter 8/10: OSS cache speed: 0.391229
Iter 8/10: ladvise speed: 0.35886
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.353374
Iter 9/10: OSS cache speed: 0.391419
Iter 9/10: ladvise speed: 0.431795
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.379876
Iter 10/10: OSS cache speed: 0.388235
Iter 10/10: ladvise speed: 0.441367
Average uncached read: .37
Average speedup with OSS cached read:  .40 = +8%
Average speedup with ladvise willread:  .40 = +8%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0