== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:48:55 (1788562135)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.6684 s, 9.8 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-ffff964cc5115800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.388151
Iter 1/10: OSS cache speed: 0.382497
Iter 1/10: ladvise speed: 0.378482
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.417753
Iter 2/10: OSS cache speed: 0.474664
Iter 2/10: ladvise speed: 0.432912
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.406876
Iter 3/10: OSS cache speed: 0.382357
Iter 3/10: ladvise speed: 0.387365
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.317961
Iter 4/10: OSS cache speed: 0.422636
Iter 4/10: ladvise speed: 0.453493
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.304075
Iter 5/10: OSS cache speed: 0.358109
Iter 5/10: ladvise speed: 0.462347
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.325907
Iter 6/10: OSS cache speed: 0.305923
Iter 6/10: ladvise speed: 0.381211
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.352873
Iter 7/10: OSS cache speed: 0.431024
Iter 7/10: ladvise speed: 0.41253
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.289729
Iter 8/10: OSS cache speed: 0.345791
Iter 8/10: ladvise speed: 0.278883
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.27214
Iter 9/10: OSS cache speed: 0.352431
Iter 9/10: ladvise speed: 0.428937
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.355711
Iter 10/10: OSS cache speed: 0.427623
Iter 10/10: ladvise speed: 0.419449
Average uncached read: .34
Average speedup with OSS cached read:  .38 = +11%
Average speedup with ladvise willread:  .40 = +17%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0