== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:06:59 (1788746819)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.8623 s, 8.2 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-ffff95b845221800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.485022
Iter 1/10: OSS cache speed: 0.457276
Iter 1/10: ladvise speed: 0.523119
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.549276
Iter 2/10: OSS cache speed: 0.561687
Iter 2/10: ladvise speed: 0.301164
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.34024
Iter 3/10: OSS cache speed: 0.376013
Iter 3/10: ladvise speed: 0.338754
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.399157
Iter 4/10: OSS cache speed: 0.411729
Iter 4/10: ladvise speed: 0.335008
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.356561
Iter 5/10: OSS cache speed: 0.339786
Iter 5/10: ladvise speed: 0.418379
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.423445
Iter 6/10: OSS cache speed: 0.39252
Iter 6/10: ladvise speed: 0.408143
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.368729
Iter 7/10: OSS cache speed: 0.342421
Iter 7/10: ladvise speed: 0.354406
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.356589
Iter 8/10: OSS cache speed: 0.44376
Iter 8/10: ladvise speed: 0.434343
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.432469
Iter 9/10: OSS cache speed: 0.421717
Iter 9/10: ladvise speed: 0.399212
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.514402
Iter 10/10: OSS cache speed: 0.541108
Iter 10/10: ladvise speed: 0.551309
Average uncached read: .42
Average speedup with OSS cached read:  .42 = +0%
Average speedup with ladvise willread:  .40 = +-4%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0