== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:55:28 (1773734128)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.4442 s, 8.4 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-ffff8b4b08fd2800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.359272
Iter 1/10: OSS cache speed: 0.315549
Iter 1/10: ladvise speed: 0.350706
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.353988
Iter 2/10: OSS cache speed: 0.307868
Iter 2/10: ladvise speed: 0.25087
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.302363
Iter 3/10: OSS cache speed: 0.366682
Iter 3/10: ladvise speed: 0.328042
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.354436
Iter 4/10: OSS cache speed: 0.331007
Iter 4/10: ladvise speed: 0.310608
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.251023
Iter 5/10: OSS cache speed: 0.296683
Iter 5/10: ladvise speed: 0.379386
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.337501
Iter 6/10: OSS cache speed: 0.313026
Iter 6/10: ladvise speed: 0.304817
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.284443
Iter 7/10: OSS cache speed: 0.299462
Iter 7/10: ladvise speed: 0.31402
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.31057
Iter 8/10: OSS cache speed: 0.272549
Iter 8/10: ladvise speed: 0.276535
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.434723
Iter 9/10: OSS cache speed: 0.362257
Iter 9/10: ladvise speed: 0.354684
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.309725
Iter 10/10: OSS cache speed: 0.328612
Iter 10/10: ladvise speed: 0.3014
Average uncached read: .32
Average speedup with OSS cached read:  .31 = +-3%
Average speedup with ladvise willread:  .31 = +-3%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0