== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:02:18 (1787389338)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.6461 s, 7.7 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-ffff905582ba2800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.359294
Iter 1/10: OSS cache speed: 0.358474
Iter 1/10: ladvise speed: 0.40978
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.394942
Iter 2/10: OSS cache speed: 0.39904
Iter 2/10: ladvise speed: 0.365135
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.366525
Iter 3/10: OSS cache speed: 0.411801
Iter 3/10: ladvise speed: 0.367517
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.322854
Iter 4/10: OSS cache speed: 0.342811
Iter 4/10: ladvise speed: 0.394666
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.328744
Iter 5/10: OSS cache speed: 0.346674
Iter 5/10: ladvise speed: 0.346472
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.356496
Iter 6/10: OSS cache speed: 0.34439
Iter 6/10: ladvise speed: 0.346126
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.304049
Iter 7/10: OSS cache speed: 0.389242
Iter 7/10: ladvise speed: 0.355122
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.298166
Iter 8/10: OSS cache speed: 0.33619
Iter 8/10: ladvise speed: 0.327962
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.364713
Iter 9/10: OSS cache speed: 0.391645
Iter 9/10: ladvise speed: 0.359118
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.339673
Iter 10/10: OSS cache speed: 0.398115
Iter 10/10: ladvise speed: 0.335287
Average uncached read: .34
Average speedup with OSS cached read:  .37 = +8%
Average speedup with ladvise willread:  .36 = +5%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0