== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:47:53 (1786978073)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.5558 s, 7.2 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-ffff955cd8e94800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.311518
Iter 1/10: OSS cache speed: 0.38201
Iter 1/10: ladvise speed: 0.321995
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.374288
Iter 2/10: OSS cache speed: 0.384749
Iter 2/10: ladvise speed: 0.400424
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.399531
Iter 3/10: OSS cache speed: 0.427958
Iter 3/10: ladvise speed: 0.431888
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.319773
Iter 4/10: OSS cache speed: 0.385159
Iter 4/10: ladvise speed: 0.360563
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.355934
Iter 5/10: OSS cache speed: 0.393185
Iter 5/10: ladvise speed: 0.382763
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.367483
Iter 6/10: OSS cache speed: 0.356252
Iter 6/10: ladvise speed: 0.441104
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.441738
Iter 7/10: OSS cache speed: 0.405559
Iter 7/10: ladvise speed: 0.40515
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.398542
Iter 8/10: OSS cache speed: 0.396597
Iter 8/10: ladvise speed: 0.398107
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.389361
Iter 9/10: OSS cache speed: 0.386523
Iter 9/10: ladvise speed: 0.395175
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.31978
Iter 10/10: OSS cache speed: 0.367945
Iter 10/10: ladvise speed: 0.366627
Average uncached read: .36
Average speedup with OSS cached read:  .38 = +5%
Average speedup with ladvise willread:  .39 = +8%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0