== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:19:58 (1772471998)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.9957 s, 7.5 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-ffff91cf02d6c000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.334475
Iter 1/10: OSS cache speed: 0.332486
Iter 1/10: ladvise speed: 0.399695
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.386888
Iter 2/10: OSS cache speed: 0.366696
Iter 2/10: ladvise speed: 0.395029
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.299266
Iter 3/10: OSS cache speed: 0.345318
Iter 3/10: ladvise speed: 0.368736
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.340084
Iter 4/10: OSS cache speed: 0.398259
Iter 4/10: ladvise speed: 0.347323
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.34872
Iter 5/10: OSS cache speed: 0.35423
Iter 5/10: ladvise speed: 0.390662
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.296931
Iter 6/10: OSS cache speed: 0.284343
Iter 6/10: ladvise speed: 0.341998
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.325536
Iter 7/10: OSS cache speed: 0.336294
Iter 7/10: ladvise speed: 0.412783
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.458039
Iter 8/10: OSS cache speed: 0.549559
Iter 8/10: ladvise speed: 0.552546
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.518071
Iter 9/10: OSS cache speed: 0.58563
Iter 9/10: ladvise speed: 0.636225
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.598567
Iter 10/10: OSS cache speed: 0.641609
Iter 10/10: ladvise speed: 0.675857
Average uncached read: .39
Average speedup with OSS cached read:  .41 = +5%
Average speedup with ladvise willread:  .45 = +15%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0