== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:03:59 (1789178639)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.7141 s, 8.2 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-ffffa06ed0e11800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.382725
Iter 1/10: OSS cache speed: 0.449624
Iter 1/10: ladvise speed: 0.420661
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.346846
Iter 2/10: OSS cache speed: 0.35254
Iter 2/10: ladvise speed: 0.395323
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.323659
Iter 3/10: OSS cache speed: 0.411283
Iter 3/10: ladvise speed: 0.455704
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.37839
Iter 4/10: OSS cache speed: 0.463464
Iter 4/10: ladvise speed: 0.502065
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.428621
Iter 5/10: OSS cache speed: 0.490041
Iter 5/10: ladvise speed: 0.375589
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.449361
Iter 6/10: OSS cache speed: 0.488488
Iter 6/10: ladvise speed: 0.377855
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.43046
Iter 7/10: OSS cache speed: 0.433772
Iter 7/10: ladvise speed: 0.45227
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.416146
Iter 8/10: OSS cache speed: 0.412683
Iter 8/10: ladvise speed: 0.467756
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.427028
Iter 9/10: OSS cache speed: 0.406158
Iter 9/10: ladvise speed: 0.462908
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.431404
Iter 10/10: OSS cache speed: 0.404235
Iter 10/10: ladvise speed: 0.388305
Average uncached read: .40
Average speedup with OSS cached read:  .43 = +7%
Average speedup with ladvise willread:  .42 = +5%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0