== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:39:09 (1790739549)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.2038 s, 8.6 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-ffff8ee309781800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.369376
Iter 1/10: OSS cache speed: 0.397468
Iter 1/10: ladvise speed: 0.402882
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.463853
Iter 2/10: OSS cache speed: 0.423428
Iter 2/10: ladvise speed: 0.412346
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.412649
Iter 3/10: OSS cache speed: 0.374367
Iter 3/10: ladvise speed: 0.531396
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.459002
Iter 4/10: OSS cache speed: 0.366872
Iter 4/10: ladvise speed: 0.462853
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.375003
Iter 5/10: OSS cache speed: 0.464266
Iter 5/10: ladvise speed: 0.357903
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.396788
Iter 6/10: OSS cache speed: 0.503887
Iter 6/10: ladvise speed: 0.436213
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.470418
Iter 7/10: OSS cache speed: 0.335758
Iter 7/10: ladvise speed: 0.33295
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.394261
Iter 8/10: OSS cache speed: 0.401487
Iter 8/10: ladvise speed: 0.401672
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.459954
Iter 9/10: OSS cache speed: 0.42824
Iter 9/10: ladvise speed: 0.533398
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.436228
Iter 10/10: OSS cache speed: 0.446408
Iter 10/10: ladvise speed: 0.463193
Average uncached read: .42
Average speedup with OSS cached read:  .41 = +-2%
Average speedup with ladvise willread:  .43 = +2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0