== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:25:52 (1789183552)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.9423 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-ffff9c8143a8e000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.378969
Iter 1/10: OSS cache speed: 0.455634
Iter 1/10: ladvise speed: 0.406926
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.324268
Iter 2/10: OSS cache speed: 0.389624
Iter 2/10: ladvise speed: 0.463687
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.406139
Iter 3/10: OSS cache speed: 0.431667
Iter 3/10: ladvise speed: 0.388397
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.406831
Iter 4/10: OSS cache speed: 0.448102
Iter 4/10: ladvise speed: 0.485661
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.446731
Iter 5/10: OSS cache speed: 0.462698
Iter 5/10: ladvise speed: 0.476039
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.485922
Iter 6/10: OSS cache speed: 0.466189
Iter 6/10: ladvise speed: 0.410412
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.412971
Iter 7/10: OSS cache speed: 0.513601
Iter 7/10: ladvise speed: 0.5682
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.429458
Iter 8/10: OSS cache speed: 0.471825
Iter 8/10: ladvise speed: 0.484196
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.330647
Iter 9/10: OSS cache speed: 0.406975
Iter 9/10: ladvise speed: 0.481997
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.367447
Iter 10/10: OSS cache speed: 0.458699
Iter 10/10: ladvise speed: 0.411828
Average uncached read: .39
Average speedup with OSS cached read:  .45 = +15%
Average speedup with ladvise willread:  .45 = +15%
Speedup with OSS cached read less than 20%,  got 15%. Skipping ladvise willread check.
fail_loc=0