== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:19:09 (1788625149)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.8928 s, 8.1 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-ffff922e18e56000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.37851
Iter 1/10: OSS cache speed: 0.40468
Iter 1/10: ladvise speed: 0.399613
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.339361
Iter 2/10: OSS cache speed: 0.380159
Iter 2/10: ladvise speed: 0.377213
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.338371
Iter 3/10: OSS cache speed: 0.344197
Iter 3/10: ladvise speed: 0.346675
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.389416
Iter 4/10: OSS cache speed: 0.414267
Iter 4/10: ladvise speed: 0.426309
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.302081
Iter 5/10: OSS cache speed: 0.392807
Iter 5/10: ladvise speed: 0.355485
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.358182
Iter 6/10: OSS cache speed: 0.403229
Iter 6/10: ladvise speed: 0.416849
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.392762
Iter 7/10: OSS cache speed: 0.449111
Iter 7/10: ladvise speed: 0.427595
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.372161
Iter 8/10: OSS cache speed: 0.400945
Iter 8/10: ladvise speed: 0.414552
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.312789
Iter 9/10: OSS cache speed: 0.403166
Iter 9/10: ladvise speed: 0.446627
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.40158
Iter 10/10: OSS cache speed: 0.401968
Iter 10/10: ladvise speed: 0.416614
Average uncached read: .35
Average speedup with OSS cached read:  .39 = +11%
Average speedup with ladvise willread:  .40 = +14%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0