== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:01:25 (1772474485)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.77786 s, 13.5 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-ffff994e9973f800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.507536
Iter 1/10: OSS cache speed: 0.491401
Iter 1/10: ladvise speed: 0.508018
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.523358
Iter 2/10: OSS cache speed: 0.545412
Iter 2/10: ladvise speed: 0.528552
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.532031
Iter 3/10: OSS cache speed: 0.543363
Iter 3/10: ladvise speed: 0.593185
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.706096
Iter 4/10: OSS cache speed: 0.719654
Iter 4/10: ladvise speed: 0.722264
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.739952
Iter 5/10: OSS cache speed: 0.896213
Iter 5/10: ladvise speed: 0.831562
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.695384
Iter 6/10: OSS cache speed: 0.889162
Iter 6/10: ladvise speed: 0.767882
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.813357
Iter 7/10: OSS cache speed: 1.01269
Iter 7/10: ladvise speed: 1.37538
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.54751
Iter 8/10: OSS cache speed: 1.5629
Iter 8/10: ladvise speed: 1.4475
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.67694
Iter 9/10: OSS cache speed: 1.52945
Iter 9/10: ladvise speed: 1.47755
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.39252
Iter 10/10: OSS cache speed: 1.29954
Iter 10/10: ladvise speed: 1.71309
Average uncached read: .91
Average speedup with OSS cached read:  .94 = +3%
Average speedup with ladvise willread:  .99 = +8%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0