== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:35:31 (1785936931)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 16.1936 s, 6.5 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-ffff9483110ff000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.216804
Iter 1/10: OSS cache speed: 0.231086
Iter 1/10: ladvise speed: 0.273337
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.367193
Iter 2/10: OSS cache speed: 0.243501
Iter 2/10: ladvise speed: 0.253658
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.277341
Iter 3/10: OSS cache speed: 0.321888
Iter 3/10: ladvise speed: 0.325375
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.268117
Iter 4/10: OSS cache speed: 0.286703
Iter 4/10: ladvise speed: 0.313473
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.279795
Iter 5/10: OSS cache speed: 0.325109
Iter 5/10: ladvise speed: 0.284299
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.41975
Iter 6/10: OSS cache speed: 0.3118
Iter 6/10: ladvise speed: 0.263651
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.214542
Iter 7/10: OSS cache speed: 0.298033
Iter 7/10: ladvise speed: 0.316747
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.36776
Iter 8/10: OSS cache speed: 0.42458
Iter 8/10: ladvise speed: 0.343297
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.377468
Iter 9/10: OSS cache speed: 0.402505
Iter 9/10: ladvise speed: 0.332811
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.287498
Iter 10/10: OSS cache speed: 0.263624
Iter 10/10: ladvise speed: 0.219067
Average uncached read: .30
Average speedup with OSS cached read:  .31 = +3%
Average speedup with ladvise willread:  .29 = +-3%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0