== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:41:47 (1775126507)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.9832 s, 6.6 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-ffff8c44e0b13000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.400974
Iter 1/10: OSS cache speed: 0.379434
Iter 1/10: ladvise speed: 0.396378
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.373235
Iter 2/10: OSS cache speed: 0.42436
Iter 2/10: ladvise speed: 0.351561
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.342806
Iter 3/10: OSS cache speed: 0.35211
Iter 3/10: ladvise speed: 0.384423
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.329009
Iter 4/10: OSS cache speed: 0.357636
Iter 4/10: ladvise speed: 0.360478
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.31958
Iter 5/10: OSS cache speed: 0.349235
Iter 5/10: ladvise speed: 0.366688
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.378615
Iter 6/10: OSS cache speed: 0.357868
Iter 6/10: ladvise speed: 0.363699
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.378453
Iter 7/10: OSS cache speed: 0.408538
Iter 7/10: ladvise speed: 0.421329
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.316513
Iter 8/10: OSS cache speed: 0.349296
Iter 8/10: ladvise speed: 0.361882
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.34994
Iter 9/10: OSS cache speed: 0.360413
Iter 9/10: ladvise speed: 0.348807
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.342861
Iter 10/10: OSS cache speed: 0.302105
Iter 10/10: ladvise speed: 0.334014
Average uncached read: .35
Average speedup with OSS cached read:  .36 = +2%
Average speedup with ladvise willread:  .36 = +2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0