== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:29:32 (1788654572)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 16.819 s, 6.2 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-ffff8bc998645000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.288528
Iter 1/10: OSS cache speed: 0.328055
Iter 1/10: ladvise speed: 0.353063
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.300324
Iter 2/10: OSS cache speed: 0.363006
Iter 2/10: ladvise speed: 0.392208
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.341203
Iter 3/10: OSS cache speed: 0.379924
Iter 3/10: ladvise speed: 0.331692
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.314496
Iter 4/10: OSS cache speed: 0.442818
Iter 4/10: ladvise speed: 0.380083
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.366021
Iter 5/10: OSS cache speed: 0.405127
Iter 5/10: ladvise speed: 0.382058
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.323999
Iter 6/10: OSS cache speed: 0.412552
Iter 6/10: ladvise speed: 0.437167
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.242154
Iter 7/10: OSS cache speed: 0.424121
Iter 7/10: ladvise speed: 0.360908
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.383797
Iter 8/10: OSS cache speed: 0.375855
Iter 8/10: ladvise speed: 0.406825
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.392836
Iter 9/10: OSS cache speed: 0.417784
Iter 9/10: ladvise speed: 0.387749
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.343831
Iter 10/10: OSS cache speed: 0.323401
Iter 10/10: ladvise speed: 0.423319
Average uncached read: .32
Average speedup with OSS cached read:  .38 = +18%
Average speedup with ladvise willread:  .38 = +18%
Speedup with OSS cached read less than 20%,  got 18%. Skipping ladvise willread check.
fail_loc=0