== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:18:25 (1788542305)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.4747 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-ffff9b4984c86800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.321909
Iter 1/10: OSS cache speed: 0.34133
Iter 1/10: ladvise speed: 0.353418
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.334254
Iter 2/10: OSS cache speed: 0.407096
Iter 2/10: ladvise speed: 0.360617
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.39653
Iter 3/10: OSS cache speed: 0.375644
Iter 3/10: ladvise speed: 0.366552
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.376148
Iter 4/10: OSS cache speed: 0.371997
Iter 4/10: ladvise speed: 0.392601
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.343837
Iter 5/10: OSS cache speed: 0.410186
Iter 5/10: ladvise speed: 0.419683
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.436711
Iter 6/10: OSS cache speed: 0.39899
Iter 6/10: ladvise speed: 0.42049
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.422226
Iter 7/10: OSS cache speed: 0.411429
Iter 7/10: ladvise speed: 0.383564
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.404143
Iter 8/10: OSS cache speed: 0.36401
Iter 8/10: ladvise speed: 0.427522
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.370788
Iter 9/10: OSS cache speed: 0.375393
Iter 9/10: ladvise speed: 0.370794
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.384636
Iter 10/10: OSS cache speed: 0.413296
Iter 10/10: ladvise speed: 0.417248
Average uncached read: .37
Average speedup with OSS cached read:  .38 = +2%
Average speedup with ladvise willread:  .39 = +5%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0