== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:49:50 (1787744990)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.6862 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-ffff9bf402b51000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.358605
Iter 1/10: OSS cache speed: 0.336137
Iter 1/10: ladvise speed: 0.357912
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.268534
Iter 2/10: OSS cache speed: 0.296143
Iter 2/10: ladvise speed: 0.341638
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.292559
Iter 3/10: OSS cache speed: 0.303089
Iter 3/10: ladvise speed: 0.299711
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.304834
Iter 4/10: OSS cache speed: 0.344947
Iter 4/10: ladvise speed: 0.318121
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.298264
Iter 5/10: OSS cache speed: 0.349925
Iter 5/10: ladvise speed: 0.348728
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.284063
Iter 6/10: OSS cache speed: 0.348356
Iter 6/10: ladvise speed: 0.330484
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.287832
Iter 7/10: OSS cache speed: 0.271273
Iter 7/10: ladvise speed: 0.315683
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.324668
Iter 8/10: OSS cache speed: 0.296889
Iter 8/10: ladvise speed: 0.304467
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.302141
Iter 9/10: OSS cache speed: 0.37068
Iter 9/10: ladvise speed: 0.294394
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.290765
Iter 10/10: OSS cache speed: 0.326763
Iter 10/10: ladvise speed: 0.294106
Average uncached read: .30
Average speedup with OSS cached read:  .32 = +6%
Average speedup with ladvise willread:  .32 = +6%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0