== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:32:37 (1788755557)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.5144 s, 6.8 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-ffff9d7e099c0000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.295136
Iter 1/10: OSS cache speed: 0.396727
Iter 1/10: ladvise speed: 0.304204
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.292164
Iter 2/10: OSS cache speed: 0.343986
Iter 2/10: ladvise speed: 0.303279
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.296931
Iter 3/10: OSS cache speed: 0.323253
Iter 3/10: ladvise speed: 0.279026
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.279661
Iter 4/10: OSS cache speed: 0.275942
Iter 4/10: ladvise speed: 0.321006
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.271175
Iter 5/10: OSS cache speed: 0.352647
Iter 5/10: ladvise speed: 0.31647
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.327874
Iter 6/10: OSS cache speed: 0.337014
Iter 6/10: ladvise speed: 0.292163
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.344959
Iter 7/10: OSS cache speed: 0.336013
Iter 7/10: ladvise speed: 0.366472
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.36375
Iter 8/10: OSS cache speed: 0.386501
Iter 8/10: ladvise speed: 0.412553
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.360824
Iter 9/10: OSS cache speed: 0.309357
Iter 9/10: ladvise speed: 0.358047
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.332189
Iter 10/10: OSS cache speed: 0.334253
Iter 10/10: ladvise speed: 0.366314
Average uncached read: .31
Average speedup with OSS cached read:  .33 = +6%
Average speedup with ladvise willread:  .33 = +6%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0