== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:04:07 (1789686247)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.05849 s, 11.6 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-ffff8b1818d2a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.33002
Iter 1/10: OSS cache speed: 0.310656
Iter 1/10: ladvise speed: 0.350286
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.274049
Iter 2/10: OSS cache speed: 0.33898
Iter 2/10: ladvise speed: 0.4106
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.402899
Iter 3/10: OSS cache speed: 0.450072
Iter 3/10: ladvise speed: 0.439105
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.44582
Iter 4/10: OSS cache speed: 0.475844
Iter 4/10: ladvise speed: 0.498006
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.395398
Iter 5/10: OSS cache speed: 0.281487
Iter 5/10: ladvise speed: 0.373109
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.38736
Iter 6/10: OSS cache speed: 0.412186
Iter 6/10: ladvise speed: 0.359615
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.366026
Iter 7/10: OSS cache speed: 0.365386
Iter 7/10: ladvise speed: 0.35618
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.346814
Iter 8/10: OSS cache speed: 0.329162
Iter 8/10: ladvise speed: 0.365883
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.335963
Iter 9/10: OSS cache speed: 0.361835
Iter 9/10: ladvise speed: 0.372504
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.37122
Iter 10/10: OSS cache speed: 0.3565
Iter 10/10: ladvise speed: 0.353949
Average uncached read: .36
Average speedup with OSS cached read:  .36 = +0%
Average speedup with ladvise willread:  .38 = +5%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0